BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:A Review of NEST Models\, and Their Application to Particle Identi fication DTSTART;VALUE=DATE-TIME:20241024T081500Z DTEND;VALUE=DATE-TIME:20241024T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4189@cern.ch DESCRIPTION:Speakers: Ekaterina Kozlova (NRNU MEPhI)\nNoble element detect ors (two-phase emission detectors\, liquid phase-only detectors\, etc.) ha ve many applications in modern research.\n\nFor example\, they are broadly used in dark matter registration\, non-standard neutrino interactions sea rches and even Standard Model processes observation (for example\, coheren t elastic neutrino-nucleus scattering (CEvNS) studies). Modeling signal ge neration from these complicated interactions requires precise simulations. The main problem of modeling such phenomena is that various theoretical p redictions are inconsistent with each other and compared to experimental d ata.\n\nIn this talk\, the current status of NEST: Noble Element Simulatio n Technique\, which is a simulation package based on reasonable empirical models informed by the world's best data on the subject\, will be discusse d.\n\nTalk will present on the methods used for modeling electronic recoil s\, nuclear recoils\, and quantification of the misidentification of the f ormer as the latter\, the primary means of determining the ability to disc riminate against residual backgrounds. NEST models results to data will be compared. Also existing work on argon will be discussed.\n\nhttps://indic o.particle.mephi.ru/event/436/contributions/4189/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4189/ END:VEVENT BEGIN:VEVENT SUMMARY:Validating position reconstruction algorithm with 241Am-9Be neutro n source in DEAP-3600 DTSTART;VALUE=DATE-TIME:20241025T150500Z DTEND;VALUE=DATE-TIME:20241025T151500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4232@cern.ch DESCRIPTION:Speakers: Aidar Ilyasov (NRNU "MEPhI"\, NRC "Kurchatov Institu te")\nThe DEAP-3600 experiment uses a modern coordinate reconstruction alg orithm that utilizes machine learning. This algorithm performed well compa red to likelihood-based approaches. Here we validate our neural network ba sed algorithm on data obtained using $^{241}$Am-$^{9}$Be radioactive sourc e. The results obtained confirm algorithm validity.\n\nhttps://indico.part icle.mephi.ru/event/436/contributions/4232/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4232/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparative study of wavelength shifters for scintillation tile re adout DTSTART;VALUE=DATE-TIME:20241025T145500Z DTEND;VALUE=DATE-TIME:20241025T150500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4217@cern.ch DESCRIPTION:Speakers: Filipp Dubinin (LPI RAS)\nTile scintillators are the wide used technology in HEP experiments. The technology implies wavelengt h shifters (WLS) to collect light from a tile and guide it toward a photom ultiplier and provides homogeneous readout from tiles with low dependence on tile shape and size. For this purpose\, WLSs must provide appropriate l ight transportation along with good light trapping efficiency and time per formance. \nHere we present results of comparative study of light collecti on and losses for four WLSs: Kyrarai Y11\, Saint Gobain BCF-92\, and two W LS of Tver works.\n\nhttps://indico.particle.mephi.ru/event/436/contributi ons/4217/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4217/ END:VEVENT BEGIN:VEVENT SUMMARY:Time-over-Threshold Method for the BM@N Highly-Granular Neutron De tector DTSTART;VALUE=DATE-TIME:20241025T100000Z DTEND;VALUE=DATE-TIME:20241025T101500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4231@cern.ch DESCRIPTION:Speakers: Nikolay Karpushkin (INR RAS)\nA highly-granular neut ron detector is currently being developed for the BM@N experiment at JINR\ , Dubna\, Russia\, aimed at measuring neutrons produced in nuclear collisi ons within the energy range of 1-4 AGeV. The detector consists of alternat ing layers of scintillators and absorbers\, with silicon photomultipliers used to capture light signals. Data readout is handled by a single-thresho ld multichannel TDC. This work presents an analytical approach to characte rizing the signals from plastic scintillator detectors read out by SiPMs\, which is fundamental to understanding the relationship between Time-over- Threshold (ToT) and signal amplitude. The analysis addresses slewing corre ctions essential for improving the detector's time resolution and the time calibration procedure.\n\nhttps://indico.particle.mephi.ru/event/436/cont ributions/4231/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4231/ END:VEVENT BEGIN:VEVENT SUMMARY:Highly Granular Time-of-Flight Neutron Detector HGND for the BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T072500Z DTEND;VALUE=DATE-TIME:20241025T074000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4203@cern.ch DESCRIPTION:Speakers: Sergey Morozov (INR/MEPhI)\nA new Highly Granular Ne utron Detector (HGND) is being developed and constructed in order to ident ify neutrons and to measure their energies from nucleus-nucleus collisions at the BM@N experiment (JINR). The HGND consists of alternating layers of copper absorber plates and matrices of scintillation cells with individua l light readout by silicon photomultipliers. The HGND will be used in the fixed target BM@N experiment in heavy-ion collisions with energies up to 4 GeV per nucleon.\n The ratios of direct and elliptic azimuthal neutron f low to the corresponding proton flow\, which can be measured with the magn etic spectrometer of the BM@N facility\, should be sensitive\, as shown in a number of models\, to the symmetry energy in the equation of state (Eo S) of high dense nuclear matter. The performance studies based on the resu lts of simulations of the new HGND detector at the BM@N experiment will be presented. The current status of the HGND construction will be discussed. \n\nhttps://indico.particle.mephi.ru/event/436/contributions/4203/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4203/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino scattering on superfluid helium with account for neutrino electromagnetic properties and collective effects DTSTART;VALUE=DATE-TIME:20241022T154500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4261@cern.ch DESCRIPTION:Speakers: Maxim Vyalkov (MSU Sarov\, NCPhM)\nSuperfluid He-4 c an serve as a tool for neutrino [1] and dark matter detection [2]. Low-ene rgy neutrino interaction with superfluid He-4 can take place in the form o f coherent elastic neutrino-atom scattering (CEvAS) [3] - a process that h as not been observed so far. The first experimental study of CEvAS is unde r preparation in the National Center for Physics and Mathematics in Sarov [4]. Using a high-intensity tritium neutrino source and a superfluid He-4 detector\, it will have a rich potential to test the neutrino physics of S tandard Model and beyond it at unprecedentedly low energies. For example\, one of the observable effects of beyond-Standard-Model physics in CEvAS c an be neutrino millicharge and magnetic moment [5]. In our work we develop a theoretical approach for studying neutrino interaction with a superflui d He-4 by taking into account single quasiparticle production in a superfl uid He-4 target upon tritium neutrino scattering. In particular\, we show that such collective effects drastically influence the neutrino scattering cross section at energy transfer of the order of 1 meV and less.\n\n[1] R .E. Lanou\, H.J. Maris\, and G.M. Seidel\, Detection of solar neutrinos in superfluid helium\, Phys. Rev. Lett. 58 (1987) 2498.\n\n[2] You\, Y.\, Sm olinsky\, J.\, Xue\, W.\, Matchev\, K.\, Saab\, T.\, Gunther\, K.\, and Le e\, Y. Signatures and detection prospects for sub-GeV dark matter with sup erfluid helium. JHEP 2023(7) (2023)  1-31.\n\n[3] M. Cadeddu\, F. Dordei\ , C. Giunti\, K. Kouzakov\, E. Picciau and A. Studenikin\, Potentialities of a low-energy detector based on 4He evaporation to observe atomic effe cts in coherent neutrino scattering and physics perspectives\, Phys. Rev. D 100 (2019) no.7\, 073014 [arXiv:1907.03302 [hep-ph]].\n\n[4] А.А. Yukh imchuk\, А.N. Golubkov\, I.P. Maximkin\, et al.\, Physics of hydrogen iso topes\, FIZMAT 1 (2023) 5 (in Russian).\n\n[5] G. Donchenko\, K. Kouzakov\ , and A. Studenikin\, Elastic neutrino-atom scattering as a probe of neutr ino millicharge and magnetic moment\, JETP Lett. 117 (2023) 879.\n\nhttps: //indico.particle.mephi.ru/event/436/contributions/4261/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4261/ END:VEVENT BEGIN:VEVENT SUMMARY:Pile-up background estimation in diboson production by the overlay Monte-Carlo method in pp collider experiment DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4423@cern.ch DESCRIPTION:Speakers: Valeria Zharova (NRNU MEPhI)\nIn case of diboson pro duction in pp collisions there is a non-negligible possibility that some e vents passing the final selection in data are actually from multiple overl apping hard-scatter processes occurring within the same bunch-crossing. Su ch events with combination of two processes associated with different prim ary vertices corresponds to so-called pile-up background. Its contribution should be considered in analysis of diboson production. \nThis study pres ents the overlay Monte-Carlo method for the estimation of pile-up backgrou nd. The proposed approach uses two separate samples to construct pile-up e vents at particle-level. Then the detector efficiency is used to obtain th e predicted number of such background events in the region of interest. \n According to the resulting estimate the impact of the pile-up background c an be either subtracted from the number of signal events or accounted as a n additional systematic uncertainty.\n\nhttps://indico.particle.mephi.ru/e vent/436/contributions/4423/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4423/ END:VEVENT BEGIN:VEVENT SUMMARY:Galactic center shadows: beyond the standard model DTSTART;VALUE=DATE-TIME:20241023T090000Z DTEND;VALUE=DATE-TIME:20241023T093000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4150@cern.ch DESCRIPTION:Speakers: Alexander Zakharov (BLTP JINR\, Dubna)\nZakharov et al. (2005a) predicted an opportunity to reconstruct a shadow in Sgr A$^*$ with ground based or space-ground interferometer acting in mm or sub-mm ba nd (the Millimetron was mentioned for such needs). The prediction was real ized in May 2022 since the Event Horizon Telescope (EHT) Collaboration pr esented results of a shadow reconstruction for our Galactic Center (earlie r the shadow around the supermassive black hole in M87 was reconstructed i n 2019). These reconstructions were based on EHT observations done in 20 17. For Reissner--Nordstr$\\ddot{\\text{o}}\\text{m}$ metric Zakharov et a l. (2005b) derived analytical expressions for shadow size as a function o f charge and later these results were generalized for a tidal charge case (Zakharov\, 2014). We discuss opportunities to evaluate parameters of a lternative theories of gravity with shadow size estimates done by the EHT Collaboration\, in particular\, a tidal charge could be estimated from th ese observations (Zakharov\, 2022). We also discuss opportunities to use Millimetron facilities for shadow reconstructions in M87$^*$ and Sgr A$^*$ . In our recent studies (Zakharov\, 2024) we discuss shadow formations for cases where naked singularities or wormholes substitute black holes in ga lactic centers.\n\n\nReferences \n\nZakharov A. F.\, Nucita A. A.\, De Pao lis F.\, Ingrosso G. (2005a) New Astron.\, 10\, 479\n\nZakharov A. F.\, De Paolis F.\, Ingrosso G.\, Nucita A. A. (2005b) A & A 442\, 795\n\nZakharo v A. F. (2014) Phys. Rev. D 90\, 062007\n\nZakharov A. F. (2022) Universe 8(3)\, 141\n\nZakharov A.F. (2024\, in press)\n\nhttps://indico.particle.m ephi.ru/event/436/contributions/4150/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4150/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the MPD experiment at NICA DTSTART;VALUE=DATE-TIME:20241022T094500Z DTEND;VALUE=DATE-TIME:20241022T102000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4078@cern.ch DESCRIPTION:Speakers: Peter Parfenov (JINR\, NRNU MEPhI)\nThe main heavy-i on experiment at Nuclotron-based Ion Collider fAcility (NICA) is the Multi -Purpose Detector (MPD). It covers the energy range from 2.4 to 3.5 GeV in fixed-target mode and from 4 to 11 GeV in collider mode. This allows us t o examine the region of the QCD phase diagram with a high baryon chemical potential\, where a first-order phase transition and the onset of the crit ical endpoint are predicted to occur. Preparations for data collection in the MPD experiment will be concluded in 2026. The study of hadron spectra and hypernucleus production\, collective flow\, correlations and fluctuati ons\, hyperon global polarization\, electromagnetic probes\, and open char m production are important contributions to the MPD physics program. In th is talk\, the project’s current status and recent results of the feasibi lity study will be presented.\n\nhttps://indico.particle.mephi.ru/event/43 6/contributions/4078/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4078/ END:VEVENT BEGIN:VEVENT SUMMARY:Constraints on neutron skin thickness and symmetry energy DTSTART;VALUE=DATE-TIME:20241024T081500Z DTEND;VALUE=DATE-TIME:20241024T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4418@cern.ch DESCRIPTION:Speakers: Nikolay Arsenyev (Bogoliubov Laboratory of Theoretic al Physic\, Joint Institute for Nuclear Research)\nThe structure of exotic neutron-rich nuclei is one of the main science drivers in contemporary nu clear physics research [1]. The new measurements of pygmy dipole (PDR) and giant dipole (GDR) resonances in neutron-rich nuclei have sparked advance ments in nuclear models. The quasiparticle random phase approximation\, ut ilizing the self-consistent mean-field derived from Skyrme effective inter actions\, is a widely used tool for describing the PDR and GDR. This appro ach made it possible to a successful description of the properties of low- lying states and the characteristics of giant multipole resonances in sphe rical nuclei [2\,3].\nDue to the anharmonicity of vibrations there is a co upling between simple particle-hole configurations and more complex states [4\,5]. As an illustration\, we study the properties of the low-lying dip ole states in the neutron-rich Ca and Ni isotopes [6\,7]. This reveals a n umber of characteristic features of the low-energy E1 modes. The effect of the low-energy E1 strength on the electric dipole polarizability is discu ssed [5]. The correlations between the electric dipole polarizability\, th e symmetry energy\, and neutron skin thickness are studied [8].\nThe resea rch was supported within the framework of the scientific program of the Na tional Center for Physics and Mathematics\, topic no. 6 “Nuclear and Rad iation Physics” (stage 2023-2025).\n\n[1] A. Zilges\, D.L. Balabanski\, J. Isaak\, and N. Pietralla\, Prog. Part. Nucl. Phys. 122\, 103903 (2022). \n[2] N. Paar\, D. Vretenar\, E. Khan\, and G. Colò\, Rep. Progr. Phys. 7 0\, 691 (2007).\n[3] E.G. Lanza\, L. Pellegri\, A. Vitturi\, and M.V. Andr és\, Prog. Part. Nucl. Phys. 129\, 104006 (2023).\n[4] V.G. Soloviev\, Th eory of Atomic Nuclei: Quasiparticles and Phonons. Bristol/Philadelphia 19 92.\n[5] A.P. Severyukhin\, N.N. Arsenyev\, and N. Pietralla\, Phys. Rev. C. 104\, 024310 (2021).\n[6] N.N. Arsenyev\, A.P. Severyukhin\, V.V. Voron ov\, and N.V. Giai\, Phys. Rev. C. 95\, 054312 (2017).\n[7] N.N. Arsenyev\ , A.P. Severyukhin\, V.V. Voronov\, and N.V. Giai\, Phys. Part. Nucl. 50\, 528 (2019).\n[8] N.N. Arsenyev\, and A.P. Severyukhin\, Moscow Univ. Phys . Bull. 79\, 200 (2024).\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4418/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4418/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing the nuclear matter equation of state with light nuclei DTSTART;VALUE=DATE-TIME:20241025T092500Z DTEND;VALUE=DATE-TIME:20241025T094000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4338@cern.ch DESCRIPTION:Speakers: Viktar Kireyeu (JINR)\nWe investigate the sensitivit y of the light nuclei and hypernuclei production to the strongly interacti ng nuclei matter equation-of-state (EoS) within the Parton-Hadron-Quantum- Molecular Dynamics (PHQMD) microscopic transport approach.\n\nPHQMD is an n-body microscopic transport approach based on Quantum Molecular Dynamics (QMD) propagation of baryonic degrees of freedom\, where clusters are form ed through potential interactions between nucleons and hyperons. The Minim um Spanning Tree (MST) algorithm is employed to identify bound clusters ba sed on the baryon correlations in the coordinate space. In addition to thi s\, a 'kinetic' mechanism for deuteron production is incorporated\, utiliz ing the catalytic hadronic reactions that account for all isospin channels . This approach enhances the deuteron production while considering its qua ntum nature through the finite-size excluded volume effect and projection of the relative momentum of the interacting pair of nucleons onto the deut eron wave function\, leading to a significant reduction of deuteron produc tion\, especially at target/projectile rapidities.\n\nWe find that static density-dependent and momentum-dependent interactions\, although yielding the same EoS for cold matter\, have markedly different effects on observab les in heavy-ion collisions. We analyze their impact on the flow coefficie nts\, the transverse momentum spectra and the fragment yields of different clusters as a function of rapidity. Our results\, compared to HADES and S TAR BES data\, show a significant sensitivity of the elliptic flow coeffic ient to the momentum-dependent potential.\n\nFurthermore\, we propose a me thod to experimentally distinguish between various deuteron production mec hanisms in heavy-ion collisions across the range of energies from SIS to R HIC.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4338/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4338/ END:VEVENT BEGIN:VEVENT SUMMARY:On fragment spectra\, Hubble law and polarization of emitted secon dary particles in a hydrodynamic model for describing high-energy heavy io n collisions DTSTART;VALUE=DATE-TIME:20241024T141500Z DTEND;VALUE=DATE-TIME:20241024T143500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4356@cern.ch DESCRIPTION:Speakers: Alexander Dyachenko (Petersburg State Transport Univ ersity)\nA.T. D’yachenko$^{1\,2}$\n\n*$^{1}$ B.P. Konstantinov Petersbur g Nuclear Physics Institute of National Research Center "Kurchatov Instit ute"\, Gatchina\, Russia*\n\n*$^{2}$ Emperor Alexander I Petersburg State Transport University\, St. Petersburg\, Russia*\n\nBased on the nonequilib rium hydrodynamic approach [1\,2]\, double differential cross sections for the spectra of light fragments emitted in the FRAGM (ITEP) experiment [3\ ,4] in collisions of carbon nuclei with a beryllium target at energies of 300 and 950 MeV/nucleon are described. To describe the fragment yield\, th e coalescence model [5\,6] was used taking into account the Goldhaber fact orization [7]\n\n In the nonequilibrium hydrodynamic approach at high ener gies of colliding heavy ions\, the Hubble law for the resulting fireball d uring its expansion was studied and in this approximation agreement with t he results of calculations using the PHSD model [8] was obtained. \n\nTaki ng the Hubble law as a basis\, in the next approximation within the framew ork of hydrodynamics\, the average vorticity was found and the polarizatio n of the emitted particles in collisions of gold nuclei at an energy of G eV/nucleon was estimated. For the impact parameter fm\, the polarization turned out to be about 5%\, which is in agreement with the experimental da ta of the STAR collaboration for hyperons and calculations using the PHS D model [8]. This may be of interest for future experiments at the NICA co llider \n\n1. A.T. D’yachenko\, I.A. Mitropolsky\, Phys. Atom. Nucl. **8 5\,** 1053 (2022).\n2. A.T.D’yachenko\, Phys.Atom. Nucl. **87**\,. 125 ( 2024). \n3. A.A. Kulikovskaya et al.\, Phys.Atom.Nucl. **85**\, 466 (2022) . \n4. В.M. Abramov et al. Phys.Atom.Nucl. **81**\, 330 (2018).\n5. A.T. D'yachenko\, Nucl. Phys. A **626**\, 273 (1997).\n6. A.T.D’yachenko\, I. A. Mitropolsky\, Bull. Russ. Acad. Sci.: Physics **81**\, 1521 (2017).\n7. A. S. Goldhaber\, Phys. Lett. B **53**\, 306 (1974). \n8. M. Baznat\, O.V . Teryaev\, A\, V. Zinchenko\, Phys. Part. Nucl. Lett. **20**\,.407 (2023) .\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4356/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4356/ END:VEVENT BEGIN:VEVENT SUMMARY:The charge losses in SiC and Si detectors at the registration of h eavy ions DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4246@cern.ch DESCRIPTION:Speakers: Yuri Gurov (Joint Institute for Nuclear Research)\ nThe results of measurements of charge losses at detection of heavy xenon ions with detectors based on boron carbide (SiC) and silicon (Si) are pres ented. It is shown that the measured values of charge losses (amplitude de fect) from the true energy of Xe ions for Si and SiC detectors are 20 and 40%\, respectively. These results are due to the significantly shorter lif etime of charge carriers created by the particle in SiC compared to silico n. When using SiC detectors\, this leads to a significantly greater recomb ination of electron-hole pairs in the region of the so-called “plasma fi lament”\, which is formed in the ion track.\n\nhttps://indico.particle.m ephi.ru/event/436/contributions/4246/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4246/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of the 213Po half-life results measured by double and t riple coincidences methods DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4172@cern.ch DESCRIPTION:Speakers: Valery Kuzminov (INR RAS)\, Vladimir Kazalov (BNO IN R RAS)\nMethod of measurement and result of processing of the 213Po α-act ive isotope half-life data measured in long-run continuous measurement wit h the underground low-background TAU-3 set-up are described. The set-up co nsists of two scintillation NaI(Tl) 150x150 mm detectors and double-layer (hlayer=1 mm) plastic scintillator detector (PCD) with d=18 mm. Source of the ...213Bi→213Po… decays placed between the PSD layers. The half-li fe calculated from a decay curve. The curve constructed from delay values between β- and α-pulses detected by the PSD. \nTwo methods used for the event selection. The PSD pulses coincided in 16 mcs time window selected i n the first case (double coincidences). Additional pulse of the NaI-SD det ected γ- quantum from the 213Bi decay used in the second case for a valid ation of the 213Po birth and decay (triple coincidences). The values T1/2= 3.6970±0.0005 mcs for the double coincidences and T1/2=3.6772±0.0005 (st atistic)±0.005 (system) mcs for the triple coincidences were obtained 213 Po half-life. Possible reasons of the result difference were discussed.\n\ nhttps://indico.particle.mephi.ru/event/436/contributions/4172/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4172/ END:VEVENT BEGIN:VEVENT SUMMARY:On the generalized parton distributions (GPDs) of spin-3/2 systems DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4404@cern.ch DESCRIPTION:Speakers: Yubing Dong (Institute of High Energy Physics\, The Chinese Academy of Sciences)\nWe give a decomposition of the vector curren t matrix element\, and present our analysis and study for the generalized parton distribution functions (GPDs) of spin-3/2 systems [1]. Sum rules of those GPDs and the structure functions of the systems are discussed. As a typical example\, we numerically calculate the electromagnetic and gravit ational form factors of the spin-3/2 baryons (like $\\Delta$\, $\\Omega$ o r other decuplet baryons) by employing a quark-diquark approach [2-4]. Lat tice calculation results are considered in order to constrain our model pa rameters. Our calculation gives a reasonable description for the electroma gnetic and mechanical properties of those spin-3/2 particles. In addition\ , the transversity of GPDs are also discussed [5].\n\n Reference s\n\n[1] Dongyan Fu\, Baodong Sun\, and Yubing Dong\, Phys. Rev. D106 (202 2)\, 116012\; \n arXiv: 2209.12161.\n\n[2] Dongyan Fu\, Baodong Sun\, a nd Yubing Dong\, Phys. Rev. D105 (2022)\, 096002\; \n arXiv: 2201.08059 .\n\n[3] Dongyan Fu\, Baodong Sun\, and Yubing Dong\, Phys. Rev. D107 (202 3)\, 116021\; \n arXiv: 2305.02680.\n\n[4] Dongyan Fu\, Jiaqin Wang\, a nd Yubing Dong\, Eur. Phys. J. C 84 (2024)\, 79\; \n arXiv: 2306.04869. \n\n[5] Dongyan Fu\, Yubing Dong\, and S. Kumano\, Phys. Rev. D109 (2024)\ , 096006\; \n arXiv: 2402.11561 .\n\nhttps://indico.particle.mephi.ru/ event/436/contributions/4404/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4404/ END:VEVENT BEGIN:VEVENT SUMMARY:Violation of scaling of  total charged-particle multiplicity norm alized by the number of nucleons-participants in central Xe-Xe and Pb-Pb c ollisions DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4340@cern.ch DESCRIPTION:Speakers: Svetlana Simak (LUHEP\, SPbSU)\nWe present a further development of the Modified Monte Carlo Glauber model (MGM) [1]\,[2]\, w hich takes into account at the given impact parameter of heavy nuclei inte raction\, for each nucleon\, the fraction (k) of energy loss\, arising du ring the consecutive inelastic nucleon-nucleon collisions due to multiple production of particles. The one-parameter model also takes into account\ , at each step of the consecutive binary collisions\, the corresponding d ecreases of the inelastic cross section value and of the charged particles yield. We updated the MGM code for the collisions of the deformed nuclei and for the possibility to reveal the contributions by different certain numbers of binary collisions to the total charged-particle multiplicity. \n This study was motivated by the results [3] on the first measurements o f the charged-particle multiplicity density and total charged-particle mu ltiplicity in Xe–Xe collisions at a centre-of-mass energy per nucleon –nucleon pair of $\\sqrt{s_{NN}} = 5.44$ TeV. The strong effect of vio lation of scaling of the total charged-particle multiplicity normalized by the number of nucleons-participants  was observed in [3] in the region of very central Xe–Xe and Pb-Pb collisions. **We show for both undeform ed and deformed nuclei\, that our one-parameter model successfully explain s the observed deviation of scaling with the number of nucleons-participa nts at the LHC energies.**\n\nThe authors acknowledge Saint-Petersburg Sta te University for a research project 95413904\n\n[1] Feofilov G.\, Ivanov A. // Journal of Physics G CS. 5. 2005. P. 230-237\n\n[2] Feofilov G.\, Se ryakov A. // AIP Conference Proceedings. 2016.1701.1. P. 07000\n\n[3] AlLI CE Collaboration\, //Physics Letters. B 790.2019. 35–48\n\nhttps://indic o.particle.mephi.ru/event/436/contributions/4340/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4340/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino oscillations and quantum decoherence DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4262@cern.ch DESCRIPTION:Speakers: Konstantin Stankevich (Moscow State University)\nThe phenomenon of neutrino oscillations emerges due to coherent superposition of neutrino mass states. An external environment can modify a neutrino ev olution in a way that the coherence will be violated. Such violation is ca lled quantum decoherence of neutrino mass states and leads to the suppress ion of flavor oscillations. In our previous paper [1] we presented a new t heoretical framework\, based on the quantum field theory of open systems a pplied to neutrinos. Within this framework we proposed and considered a ne w mechanism of the neutrino quantum decoherence engendered by the neutrino radiative decay in an electron background in an extreme astrophysical env ironment. In the present study we generalize our approach and investigate a novel mechanism for neutrino quantum decoherence\, which arises due to t he neutrino decay into a lighter neutrino state and a massless particle\, as well as the inverse process of absorption of a massless particle by neu trino. We have derived the new evolution equation for the neutrino evoluti on that accounts for these processes. We demonstrate that studying of neut rino quantum decoherence through this evolution equation provides a unique possibility to determine or constraint the neutrino decay width.\n\n[1] K . Stankevich\, A. Studenikin\, Neutrino quantum decoherence engendered by neutrino radiative decay\, Phys.Rev. D 101\, 056004 (2020).\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4262/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4262/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of electron flow in a pyroelectric accelerator DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4242@cern.ch DESCRIPTION:Speakers: Pavel Shapovalov (National Research Nuclear Universi ty "MEPhI")\, Andrey Oleinik (BelSU)\nBy periodically varying the temperat ure of a pyroelectric single crystal under vacuum conditions\, a compact c harged particle accelerator can be created [1]. In addition to the single crystal\, this also requires a grounded target\, which acts as the second electrode in the acceleration scheme. This type of accelerator can be desc ribed as quasi-electrostatic. In various modes\, this compact device can s erve as a monoenergetic source of non-relativistic electrons\, ions\, X-ra ys\, and even neutrons [2-4].\n \nThis paper discusses the phase character istics\, emittance\, and focusing of such an accelerator. The study was co nducted both experimentally and through numerical simulation. Issues relat ed to avalanche breakdown\, which are significant for practical applicatio ns\, and stability and reproducibility of electron beams are also discusse d.\n\nThe work of P.G. Shapovalov and A.N. Oleinik was financially support ed by a Program of the Ministry of Education and Science of the Russian Fe deration for higher education establishments\, Project No. FZWG-2020-0032 (2019-1569).\n \n**References**\n\n 1. L. E. Garn\, E. J. Sharp\, J. App. Phys. **83** (1982)\n 2. G. Rosenman\, D. Shur\, Ya. E. Krasik\, A. Dunaev sky\, J. App. Phys. **88** (2000)\n 3. J. A. Geuther\, Y. Danon\, J. App. Phys. **97** (2005)\n 4. J. D. Brownridge\, S. M. Shafroth\, App. Phys. Le tters **85** (2004)\n\nhttps://indico.particle.mephi.ru/event/436/contribu tions/4242/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4242/ END:VEVENT BEGIN:VEVENT SUMMARY:Characteristics Of SiC-and Si-detectors After Alpha Particle Irrad iation DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4234@cern.ch DESCRIPTION:Speakers: Sergey Evseev (DLNP JINR)\nThe results of a study of detectors made of silicon carbide (SiC) and silicon (Si) are presented. T he irradiation was carried out using exemplary spectrometric α-sources wi th energies $E = 4.8 - 7.7$ MeV. The thickness of the epitaxial layer of t he n-type SiC detectors was 25 and 50 microns\, with a contact diameter of 3.0 mm. The initial energy resolution of the detectors was \n\nhttps://in dico.particle.mephi.ru/event/436/contributions/4234/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4234/ END:VEVENT BEGIN:VEVENT SUMMARY:Evaluation of the Influence of the Beam Pipe on the Accuracy of So lving the Problem of Determining the Coordinates of Au-Au Interactions DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4233@cern.ch DESCRIPTION:Speakers: Mikhail Zharov (SPbSU)\nThe experimental setup for t he MPD collider at NICA\, currently under construction at JINR [1]\, is pl anned to study the fundamental properties of matter in heavy-ion collision s at energies up to 11 GeV/nucleon. \nThis work focuses on the problem of determining the initial coordinates of Au-Au interactions at a system of c enter-of-mass energy of 7 GeV/nucleon and the impact of different beam pip e configurations on the accuracy of this determination. The approach used is based on the works [2]\, [3]. The UrQMD 3.4 event generator [4] was use d for simulating interactions. The obtained results were then imported int o a program implemented with Geant4 via the chromo interface [5]. These re sults were used to train a neural network model for solving the problem of determining the initial coordinates of ions. \nFour scenarios were consid ered: with beam pipe wall thicknesses of 1.2\, 3\, 5\, and 8 mm\, and mate rials of carbon or iron. The detection areas were located 4 meters from th e interaction point and consisted of rings with a diameter of 600 mm. The accuracy of the coordinate determination was measured using the square roo t of the mean square error (MSE). \nWe found that using an beam pipe with a thickness of 1 - 3 mm does not significantly affect the result and allow ed us\, for example\, to achieve a precision for a carbon beam pipe with a thickness of 1.2 mm of √ 𝑀𝑆𝐸 ≈ 3.82 cm. \nFurther increasing the thickness of the beam pipe decreases the accuracy of the solution. Fo r an iron beam pipe with a thickness of 8 mm the inaccuracy increases to √ 𝑀𝑆𝐸 ≈ 6.30 cm. \nThe work was supported by a grant from Sai nt Petersburg State University ID 95413904\n\nReferences\n\n[1] Abraamyan K. U. et al. «The MPD detector at the NICA heavy-ion collider at\nJINR» // Nuclear Instruments and Methods in Physics Research Section A: Accelera tors\, Spectrometers\, Detectors and Associated Equipment\, 2011\, v. 628\ , No 1\, p. 99-102.\n\n[2] V. S. Sandul \, G. A. Feofilov F. F. Valiev. « Studying Capabilities of a Fast Monitor for Beam Collisions by Monte Carlo Simulations and Machine Learning Methods» // Phys. At. Nucl.\, v. 54 (20 23)\, p. 712-716.\n\n[3] K.A. Galaktionov\, V.A. Roudnev\, F.F. Valiev. « Artificial Neural Networks Application in Estimating the Impact Parameter in Heavy Ion Collisions Using the Microchannel Plate Detector Data: Physic s of Atomic Nuclei» // Phys. At. Nucl.\, v. 86\, i. 6 (2023)\, p. 1426- 1 432\n\n[4] Bleicher\, M. and others. «Relativistic hadron hadron collisio ns in the ultrarelativistic quan- tum molecular dynamics model» // J.Phys . G 25 (1999)\, p. 1859-1896\n\n[5] GitHub Repository\nUrl: https://github .com/impy-project/chromo\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4233/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4233/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark energy due to quantum corrections to effective potential DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4145@cern.ch DESCRIPTION:Speakers: Vladislav Filippov (Bogoliubov Laboratory of Theoret ical Physics\, Joint Institute for Nuclear Research\, Dubna\, Russia)\nInf lationary expansion is one of the most promising models allowing one to de scribe the properties of the early Universe and its later development. In the simplest realisation of the inflationary scenario\, it is generally as sumed that after the Universe leaves the inflationary stage and post-infla tionary reheating\, it remains at minimum potential with a value of $\\Lam bda \\sim 10^{-47}$ GeV$^{4}$ or $10^{-120}$ in Planck units.\n\nIn this w ork\, we show that quantum corrections to some cosmological models [1\,2] can lead to a significant modification of the behaviour of the initial pot ential and the appearance of a non-zero ground state energy of the Univers e which can be interpreted as a cosmological constant.\n\nWe apply the for malism of the effective potential to the simplest forms of $\\alpha$-attra ctors which can be represented by the so-called $T$-models and $E$-models [3]. However\, simpler models\, say\, such as arbitrary degree potentials\ , we have considered in [1].\n\nWe derived the generalised renormalisation group (RG) equations that sum up the whole sequence of leading logarithmi c contributions to the effective potential. As a result\, the accounting o f quantum corrections leads to a change of character and a lift of the eff ective potential [4\,5]. We interpreted this uplift as the appearance of t he cosmological constant $\\Lambda$ for the $T^{2}$ and $E^{2}$ models.\n\ nThus\, we have found out that the cosmological constant $\\Lambda$ may ex ist as a consequence of quantum corrections to the effective potential wi th some value of the scale transmutation parameter $\\mu$ even in non-reno rmalizable models of inflation. And the value of the cosmological constant $\\Lambda$ allows one to fix the parameter $\\mu$ which is a free paramet er in the non-renormalizable theory.\n\n[1] D. I. Kazakov\, R. M. Iakhibba ev\, and D. M. Tolkachev. Leading all-loop quantum contribution to the eff ective potential in general scalar field theory. JHEP\, 04:128\,2023.\n\n[ 2] D. I. Kazakov\, R. M. Iakhibbaev\, and D. M. Tolkachev. Leading all-loo p quantum contribution to the effective potential in the inflationary cosm ology. JCAP\, 09:049\,2023.\n\n[3] Renata Kallosh\, Andrei Linde\, and Die derik Roest. Superconformal Inflationary $\\alpha$ -Attractors. JHEP\, 11: 198\, 2013.\n\n[4] Tolkachev D. M.\, Kazakov D. I.\, Iakhibbaev R. M.\, an d Filippov V. A. Quantum corrections to effective potentials of simplest 𝛼-attractors. PoS\, ICPPCRubakov2023:022\,2024.\n\n[5] D. I. Kazakov\, R. M. Iakhibbaev\, D. M. Tolkachev\, and V. A. Filippov. Dark energy due t o quantum corrections to effective potential. *In preparation*.\n\nhttps:/ /indico.particle.mephi.ru/event/436/contributions/4145/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4145/ END:VEVENT BEGIN:VEVENT SUMMARY:The study of the time resolution of the 3D neutrino detector Super FGD DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4229@cern.ch DESCRIPTION:Speakers: Mariia Kolupanova (INR RAS)\nFor further investigati on of neutrino oscillations in the T2K\nexperiment\, a 3D segmented SuperF GD detector is constructed. It\nconsists of 2 million scintillation cubes of 1 cm3 size\, with wavelength-\nshifting (WLS) fibers along three orthog onal directions. Each fiber is read\nout by a Hamamatsu Multi-Pixel Photon Counter S133060-1325PE. The\ndetector main goals are to reduce systematic uncertainties and increase\nthe sensitivity of a search for CP-violations in the lepton sector.\nPreliminary results of time resolution using upstr eam and side fibers\nwere received with cosmic run after implementing time offset and time\nwalk calibration. It was obtained that the time resoluti on is $\\sigma\\simeq 1.17$ ns for\none fiber readout and a threshold of 4 0 photoelectrons. The main\ncalibration parameters\, the light yield\, and the attenuation length\nobtained during the detector commissioning with c osmics and in the T2K\nneutrino beam will be also presented in this report .\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4229/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4229/ END:VEVENT BEGIN:VEVENT SUMMARY:Supernova neutrino distribution: correlation of fit parameters wit h hydrodynamic spatial scales DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4109@cern.ch DESCRIPTION:Speakers: Igor Ognev (P. G. Demidov Yaroslavl State University )\nThe minimum analytical model describing the neutrino radiation at condi tions of core-collapse supernova\, is considered. We find that such model contains four parameters. Each of these parameters depends on the radial c oordinate and time. In addition\, the numerical values of individual param eters have a large spread of values and significantly depend on the hydrod ynamics of the explosion. Thus\, it is important not only for finding neut rino parameters within the one of the supernova explosion models\, but als o the their generalization for other explosion models. For this purpose\, we use results of the one-dimensional simulation of neutrino propagation\, performed self-consistently with hydrodynamics in Prometheus-Vertex code. Both neutrino parameters and characteristic hydrodynamic scales were obta ined for progenitor from 11.2 to 25 Solar masses at different times after a bounce. It is shown\, that in the outer part of the supernova the angula r distribution parameter of the neutrino correlates with the protoneutron star radius. In this region\, the energy parameters can be considered as c onstant in radial coordinate. Fourth parameter can be fixed by the superno va neutrino luminosity. Thus\, the proposed approach allows to obtain the radial dependence of the modeling parameters of neutrino radiation in vari ous explosion models. Moreover\, in the outer part the neutrino radiation is determined by four global parameters of the supernova: the protoneutron star radius\, the neutrino luminosity\, average neutrino energy and the w idth of the spectral distribution.\n\nThe work is supported by the Russian Science Foundation (Grant No.\n24-22-00417\, https://rscf.ru/project/24-2 2-00417/)\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4109 / LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4109/ END:VEVENT BEGIN:VEVENT SUMMARY:THE REVISION OF THE BETA PARTICLES AND ANTINEUTRINO SPECTRA FROM U -235\,PU-239 AND U-238 FISSION PRODUCTS BASED ON THE UPDATED MEASUREMENTS OF THE RATIO OF SPECTRA U-235/PU-239 DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4258@cern.ch DESCRIPTION:Speakers: Даниэль Попов ()\nBased on new measureme nts of the ratio of cumulative spectra of $\\beta$-particles ${}^{235}\\te xt{U} / {}^{239}\\text{Pu}$ performed at the Kurchatov Institute (KI)\, th e cumulative spectra of $\\beta$-particles and $\\bar{\\nu}_{e}$ fission p roducts of ${}^{235}\\text{U}$\, ${}^{239}\\text{Pu}$ and ${}^{238}\\text{ U}$ isotopes have been updated. The obtained spectra $\\bar{\\nu}_{e}$ ${ }^{235}\\text{U}$\, ${}^{239}\\text{Pu}$ and ${}^{238}\\text{U}$ KI are co mpared with similar spectra of the Huber-Mueller (HM) model\, and the spec tra of $\\beta-$ particles of KI are compared with the spectra of $\\beta- $ particles of ${}^{235}\\text{U}$\, ${}^{239}\\text{Pu}$\, measured at th e Institute Laue-Langevin (ILL)\, and the spectrum of $\\beta-$ particles ${}^{238}\\text{U}$ -- at the Technical University of Munich (TUM). The ca lculated inverse beta-decay yields are in good agreement with the reactor neutrino experiments data.\n\nhttps://indico.particle.mephi.ru/event/436/c ontributions/4258/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4258/ END:VEVENT BEGIN:VEVENT SUMMARY:Anomalous cosmic-ray correlations revisited with a complete full-s ky sample of BL Lac type objects DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4096@cern.ch DESCRIPTION:Speakers: Maria Kudenko (Lomonosov Moscow State University\, T he Institute for Nuclear Research of the Russian Academy of Sciences)\nCos mic rays with energies above $10^{19}$eV\, observed in 1999 - 2004 by the High Resolution Fly's Eye (HiRes) experiment in the stereoscopic mode [1]\ , were found to correlate with directions to distant BL Lac type objects ( BL Lacs\, which constitute a subclass of blazars\, are active galactic nuc lei with jets pointing to the observer)\, suggesting non-standard neutral particles travelling for cosmological distances without attenuation. This effect could not be tested by newer experiments because of their inferior angular resolution. The distribution in the sky of BL Lacs associated with cosmic rays was found to deviate from isotropy\, which might give a clue to the interpretation of the observed anomaly. However\, previous studies made use of a sample of BL Lacs which was anisotropic by itself\, thus com plicating these interpretations. In this work authors use a recently compi led isotropic complete sample of BL Lacs and the same HiRes data to confir m the presence of correlations and to strengthen the case for the local la rge-scale structure pattern in the distribution of the correlated events i n the sky.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/409 6/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4096/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDY OF THE STRUCTURE OF 12C AND 6Li NUCLEI IN THE ALPHA-CLUSTER MODEL BY HYPERSPHERICAL FUNCTIONS DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4173@cern.ch DESCRIPTION:Speakers: Anton Bazhin (JINR\, MEPHI)\nThe light nuclei 12C an d 6Li used as target and projectile nuclei in the many experimental studie s of the nuclear reactions\, including Flerov Laboratory of Nuclear Reacti on (JINR). The study of the structure of these nuclei is necessary for the oretical description of such reactions. Wave functions of the ground state of the 12C and 6Li nuclei in the alpha-cluster model are calculated using hyperspherical functions [1]. Cubic spline interpolation is applied for s olving hyperradial equations [1]. The alpha-alpha interaction in the 12C n ucleus is changed in comparison with well-known Ali-Bodmer potential [2]. As a result\, the energy of separation to alpha-particles and the charge d istributions were calculated and agreement with experimental data [3‒5] was obtained (Fig. 1). The alpha-cluster model may explain the strong obla te deformation of the 12C nucleus (with β2 = ‒0.59 [6]). In addition\, the shell model of the deformed nuclei is used to calculate the nucleon st ates in the 12C nucleus for comparison against alpha-cluster model.\n\n1. V.V. Samarin\, Eur. Phys. J. A\, 2022\, V. 58. 117.\n2. S. Ali\, A.R. Bodm er\, Nucl. Phys. 1966. V. 80. P. 99.\n3. I. Sick\, Phys. Lett. B. 1982. V. 116. P. 212.\n4. L.S. Cardman\, J.W. Lightbody Jr.\, S. Penner\, et al.\, Phys. Lett. B. 1980. V. 91. P. 203.\n5. W. Reuter\, C. Fricke\, K. Merle and H. Miska\, Phys. Rev. C. 1982. V. 26. P. 806.\n6. Chart of nucleus sha pe and size parameters\, http://cdfe.sinp.msu.ru/services/radchart/radmain .html.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4173/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4173/ END:VEVENT BEGIN:VEVENT SUMMARY:Production of Fluorine-18 and Its Applications in Nuclear Medicine Using PET Equipment DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4252@cern.ch DESCRIPTION:Speakers: Gabriela Alessandra Villacorta García (Universidad de El Salvador)\nThe physics of positrons becomes crucial when working wit h radioactive isotopes like Fluorine-18\, which has a proton-rich nucleus and\, therefore\, an excess of energy that is released by emitting positro ns and neutrinos. Fluorine-18 has important applications in medical diagno stics due to its similarity to the hydrogen molecules in the human body\, especially when combined with the drug fluorodeoxyglucose $^{18}FDG$. The diagnosis is performed using PET/CT equipment\, which detects the annihila tion photons produced by the interaction of positrons with electrons in th e patient's organs or tissues. The production of this isotope is carried o ut in particle accelerators\, such as the cyclotron. This study will focus on the production and use of Fluorine-18 in its form of $^{18}FDG$ as a r adiopharmaceutical tracer for subsequent studies with PET/CT equipment\, s pecifically the PET component.\n\nhttps://indico.particle.mephi.ru/event/4 36/contributions/4252/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4252/ END:VEVENT BEGIN:VEVENT SUMMARY:Sensitivity of the νGeN experiment to the antineutrino magnetic m oment and millicharge DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4279@cern.ch DESCRIPTION:Speakers: Georgii Ignatov ()\nThe νGeN experiment aims to stu dy coherent elastic neutrino-nucleus scattering and antineutrino electroma gnetic properties. The experimental setup is deployed at the Kalinin Nucle ar Power Plant. The data is collected with the help of a 1.4 kg high purit y germanium detector located at about 11 meters from the reactor core. Thi s poster presents the estimate of the sensitivity of the νGeN experiment to antineutrino magnetic moment and charge. The estimate is performed base d on the energy deposition spectrum corresponding to 69.2 days exposition time in the reactor OFF regime.\n\nhttps://indico.particle.mephi.ru/event/ 436/contributions/4279/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4279/ END:VEVENT BEGIN:VEVENT SUMMARY:Machine Learning for FARICH Reconstruction in the SPD experiment a t NICA DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4416@cern.ch DESCRIPTION:Speakers: Foma Shipilov (HSE University)\nA Focusing Aerogel R ICH detector (FARICH) detector is a valuable component of the particle ide ntification system in the SPD experiment\, improving the separation of pio ns and kaons in final open charmonia states (momenta below 5 GeV/c). High event rate resulting from a free-running (triggerless) data acquisition pi peline of the SPD necessitates the development of a rapid\, robust softwar e event reconstruction. In this contribution\, we develop a Convolutional Neural Network (CNN)-based approach to FARICH reconstruction inspired by m achine learning techniques from computer vision. The use of a flexible mod el trained in an end-to-end fashion allows for a more complete utilization of the input data\, achieving higher quality particle separation compared with traditional approaches.\n\nhttps://indico.particle.mephi.ru/event/43 6/contributions/4416/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4416/ END:VEVENT BEGIN:VEVENT SUMMARY:Polarization correlations of entangled and classical two-photon st ates DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4415@cern.ch DESCRIPTION:Speakers: Sultan Musin (INR RAS)\nTwo-photon maximally entangl ed states or so called Bell states are the most popular objects for the st udy of quantum entanglement\, which is the most fascinating feature of mic ro world. Most commonly\, the tests of the entanglement are performed by m easuring the polarization correlations of the corresponding photons. Such correlation has a specific behavior expressed by cosine function with some normalizing amplitude. Generally\, this behavior is assigned as a feature inherent to quantum systems. Nevertheless\, simple theoretical considerat ions and Monte Carlo simulation of classical systems reveal that similar c osine-like polarization correlations are observed also for separable photo ns with correlated polarizations. As the same time\, the amplitude of the correlation for classical systems is a factor of 2 smaller comparing to th at for quantum entangled two-photon states. These results stress the neces sity of the accurate measurement of the polarimeters efficiencies. It is e specially important for the study of the entangled annihilation photons th rough the Compton scattering\, since the analyzing power of corresponding Compton polarimeters is inherently small and results in low amplitude of p olarization correlations.\n\nhttps://indico.particle.mephi.ru/event/436/co ntributions/4415/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4415/ END:VEVENT BEGIN:VEVENT SUMMARY:APPLICATION OF UNIVERSALITY IN DEVELOPMENT OF CASCADE PROCESSES FO R STUDYING HIGH-ENERGY COSMIC PARTICLES IN SPACE EXPERIMENTS DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4410@cern.ch DESCRIPTION:Speakers: Sayora Ibraimova (Satbayev University\, Institute of Physics and Technology)\, Anastassiya Fedossimova (Institute of Physics a nd Technology)\nIn this paper\, we propose a method that makes it possible to use an ultrathin calorimeter for direct measurements of cosmic rays wi th energies of TeV and higher. The problems of determining the primary ene rgy with a thin calorimeter\, due to large fluctuations in shower developm ent\, the low statistics of analyzed events and the large size required fo r the calorimeter\, are considered in detail. A solution to these problems is proposed on the basis of a lessening fluctuation method. This method i s based on the assumption of the universality of the development of cascad es initiated by particles of the same energy and mass. For energy reconstr uction\, so‐called correlation curves are used. The main analyzed quanti ties are the size of the cascade and the rate of its development. The meth od was tested using a heterogeneous calorimeter consisting of 22 layers of tungsten absorber and silicon detector. Based on simulations\, it is show n that the primary energy can be determined on the ascending branch of the cascade curve. This fact solves the problems associated with the need to increase the calorimeter thickness with an increase in primary energy and with the limitation of the analyzed events. The proposed technique is univ ersal for different energies and different nuclei.\nThe study was carried out with the financial support of the Ministry of Education and Science of the Republic of Kazakhstan (grant No. AP22785312).\n\nhttps://indico.part icle.mephi.ru/event/436/contributions/4410/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4410/ END:VEVENT BEGIN:VEVENT SUMMARY:Sivers asymmetries of charged pions in muons semi inclusive deep i nelastic scattering off polarized protons in PYTHIA8+StringSpinner model DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4408@cern.ch DESCRIPTION:Speakers: Andrey Lobanov (SPbPU)\, Evgenii Muzyaev (Peter the Great St.Petersburg Polytechnic University)\nThe semi-inclusive deep inela stic scattering (SIDIS) of a lepton on a polarized proton provides a means of studying the internal structure of the proton. This scattering gives a n observable\, the Sivers asymmetry\, which can be measured for positive a nd negative pions productions within the scattering event. This measuremen t allows access to the Sivers parton distribution function (PDF).\n \nIn t his study\, we have devised a methodology for calculating the Sivers asymm etry using PYTHIA8 and modified in this report StringSpinner plugin for ch arged pions in the muon SIDIS on a polarized proton. To validate the devel oped method\, we present a comparison between the calculated Sivers asymme tries as a function of the Björken variable $x_{\\text{Bj}}$ and the expe rimental values obtained by the COMPASS experiment.\n\nWe acknowledge supp ort from Russian Ministry of Education and Science. State assignment for f undamental research (code FSEG-2024-0033)\n\nhttps://indico.particle.mephi .ru/event/436/contributions/4408/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4408/ END:VEVENT BEGIN:VEVENT SUMMARY:Estimate of radiation background using modelling for the SRC exper iment on HyperNIS DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4405@cern.ch DESCRIPTION:Speakers: Angelina Bochkova (JINR)\nBackground radiation estim ation is an important part of the process of planning and conducting exper iments in high energy physics. The aim of this work is not only to calcula te radiation doses for the safe conduct of the new short-range correlation s experiment using Geant4\, but also to compare with the results obtained using FLUKA.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 405/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4405/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of different centrality determination methods at the BM @N experiment DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4341@cern.ch DESCRIPTION:Speakers: Dim Idrisov ()\nThe centrality determination procedu re provides an estimate of the initial geometry in heavy ion collisions th rough a connection between the observable and the impact parameter. The mu ltiplicity of produced charged particles and the two-parameter Glauber mod el is usually used to determine the centrality. However\, there are diffic ulties in using this approach at NICA collider energies due to the large u ncertainty of the impact parameter at small multiplicity\, autocorrelation effect\, etc. \n New approach to determine the centrality based on B ayes' theorem and two-dimensional Gamma distribution is proposed. This met hod allows to obtain information about the impact parameter by using only the measured two-dimensional energy distribution of spectator nucleons and the multiplicity of produced charged particles. A new method to account f or the efficiency of the detector system and the pileup is also proposed. The performance of the proposed approach has been tested on simulation dat a from the DCM-QGSM-SMM model for Xe+CsI collisions at a beam energy of 3. 8A GeV. The GEANT4 software package was used for a realistic response of t he BM@N detector system.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4341/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4341/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of the NeuCBOT utility for evaluation of neutron yield s and spectra from (a\,n) reactions DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4287@cern.ch DESCRIPTION:Speakers: Ivan Goncharenko (MSU)\nConsideration of $\\left(\\a lpha\,n\\right)$ reactions is necessary for conducting precision experimen ts on detection and study of neutrinos and dark matter particles in modern ultra-low background installations. As a result\, computational tools suc h as NeuCBOT are emerging that facilitate the evaluation of the background caused by $\\left(\\alpha\,n\\right)$ reactions. The NeuCBOT utility orig inally uses the TENDL database\, obtained with the TALYS software package\ , to calculate the neutron yield and spectrum. However\, using this approa ch\, the output data seems to be overestimated and the spectra are likely to be distorted. \n\nThe NeuCBOT utility has been upgraded by adding an ab ility to use new input data obtained from the JENDL database. Its advantag e is that it contains evaluated experimental data. As a result an universa l algorithm for calculating the kinematics of $\\left(\\alpha\,n\\right)$ reactions and data processing for subsequent use in calculations within th e NeuCBOT utility were created. Neutron yields and neutron spectra for $\\ left(\\alpha\,n\\right)$ reactions based on JENDL data can be obtained now \, including cases for individual channels of $\\left(\\alpha\,n\\right)$ reactions when the final nucleus is in an excited or ground state. This ne w option is available for the following target nuclei: $^{6-7}$Li\, $^{9}$ Be\, $^{10-11}$B\, $^{12-13}$C\, $^{14-15}$N\, $^{17-18}$O\, $^{19}$F\, $^ {23}$Na.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4287/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4287/ END:VEVENT BEGIN:VEVENT SUMMARY:Charged pion\, kaon and proton spectra in Ar+Ar and p+p collisions at $\\sqrt{s_{NN}}$ = 11 and 27 GeV in UrQMD model DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4342@cern.ch DESCRIPTION:Speakers: Yulia Karpova ()\, Matvey Kondratev ()\nThe study of the momentum spectra of charged particles allows one to obtain informatio n about the thermodynamic characteristics of system arising from the colli sion of heavy ions. This research can improve the understanding of their i nteractions and dynamics in various physical processes.\n\nThe aim of this work is to study the momentum spectra of pions\, kaons\, and protons in A r+Ar and p+p at energy $\\sqrt{s_{NN}} = 11$ and 27 GeV\, respectively\, b y using the UrQMD (Ultrarelativistic Quantum Molecular Dynamics) model for the SPD experiment at NICA. The spectra are presented as a function of tr ansverse momentum and collision centrality. The extracted kinetic temperat ure for the protons\, pions and kaons was obtained using hydrodynamic Blas t-Wave approach based on Boltzmann statistics. Physics implications will b e discussed.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 342/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4342/ END:VEVENT BEGIN:VEVENT SUMMARY:Searching for bosonic dark matter with iDREAM neutrino detector at the Kalinin Nuclear Power Plant DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4288@cern.ch DESCRIPTION:Speakers: K. Kiselev (National Research Nuclear University «M EPhI»)\nBosonic dark matter search results with neutrino detector iDREAM at Kalinin Nuclear Power Plant are presented. Using accurate data on compo sition of the active core of VVER-1000 nuclear reactor and fission fractio ns of primary fissile isotopes\, the $\\gamma$-radiation energy spectrum i n the active core is calculated. Assuming that the dark bosons can be prod uced in the active core via $\\gamma$-scattering on electrons and can be d etected via an inverse process inside the iDREAM detector\, experimental b ounds on the coupling constant $g_X$ between the dark boson and Standard M odel charged current are derived.\n\nhttps://indico.particle.mephi.ru/even t/436/contributions/4288/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4288/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for Large Extra Dimensions in the DANSS experiment DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4285@cern.ch DESCRIPTION:Speakers: Natalia Skrobova (LPI RAS)\nThe DANSS detector is pl aced under the reactor core of Kalinin NPP (at distances 10.9–12.9 m) an d collects up to 5000 antineutrino events per day. One of the main goals o f the experiment is to scrutinize the sterile neutrino hypothesis. A large fraction of allowed parameter space was excluded by DANSS: for some value s of Δm$^2$\, the exclusion goes up to $\\sin^2(2\\theta)\n\nhttps://indi co.particle.mephi.ru/event/436/contributions/4285/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4285/ END:VEVENT BEGIN:VEVENT SUMMARY:Isotropic light source for calibration of liquid scintillator neut rino detectors DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4284@cern.ch DESCRIPTION:Speakers: Peter Rudakov (MSU Physics Faculty\, SINP MSU)\nThe isotropic light source for calibration of liquid scintillator neutrino det ectors has been developed. The Monte Carlo simulation was performed to opt imize its design. The satisfactory version of the source design was chosen . And the source was produced. It is currently being tested in the TAO det ector. Also\, the report covers the development of a primary particle gene rator which is able to launch large amount of photons in a single event. T he generator provides flexible management of primary photons properties in cluding their distribution type. In parallel\, the report includes the res ults of model testing and a description of observed effects.\n\nhttps://in dico.particle.mephi.ru/event/436/contributions/4284/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4284/ END:VEVENT BEGIN:VEVENT SUMMARY:Estimation of systematic uncertainties for the data analysis in th e near detector of the T2K neutrino experiment DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4274@cern.ch DESCRIPTION:Speakers: Daria Fedorova (INR RAS\, MIPT)\nThe Tokai-to-Kamiok a (T2K) [1] is a flagship long-baseline accelerator experiment located in Japan. T2K is designed to measure neutrino oscillation parameters and furt her probe CP violation in the lepton sector of the Standard Model. The nea r detector ND280 [1] is an essential part of the experimental facility. Th e detector studies various interaction channels\, the flavor content and e nergy spectrum of the un-oscillated neutrino beam. Its data are used to tu ne parameters of the cross-section and flux models\, thereby reducing syst ematic uncertainties and enhancing the precision of neutrino oscillation m easurements. ND280 is a complex apparatus consisting of several modules. T he structure leads to various sources of systematic uncertainties related to simulation and tracking of neutrino interaction products. The methods u sed to estimate the systematic errors and to propagate them through the st ages of the oscillation analysis will be presented in the poster.\n\n[1] A be K. et al. [T2K Collaboration]\, "The T2K experiment"\, Nuclear Instrume nts and Methods in Physics Research\, vol. 659\, 2011.\n\nhttps://indico.p article.mephi.ru/event/436/contributions/4274/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4274/ END:VEVENT BEGIN:VEVENT SUMMARY:Cosmological model for a distant observer of ALP domain wall DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4140@cern.ch DESCRIPTION:Speakers: Максим Краснов (Александров ич)\nWe consider axion-like particle (ALP) model to construct numerical spatially homogeneous anisotropic Kantowski-Sachs cosmological model. We p resent our first-step approximation on analysis of the background' dynamic s of domain wall\, induced by ALP scalar field. We consider limiting case far from the wall itself\, yet we found non-trivial behaviour of the space -time.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4140/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4140/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutron response function of CeBr3 detector for 1.25-5.75 MeV neut ron energy range. DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4191@cern.ch DESCRIPTION:Speakers: Mark Povolotskiy (FLNR JINR\, NRNU MEPHI)\nNeutron r esponse function of CeBr3 detector for \n\n1.25-5.75 MeV neutron energy r ange. \n\n Povolotskiy M.A.1\,2\, Sobolev Yu.G.1\, Stukalov S.S.1\, Bezbak h A.A.1\, \n\nPenionzhkevich Yu.E.1\,2\, Salakhutdinov G.Kh2\, Naumov P.Y u2 \n\n1 JINR\, Joint Institute for Nuclear Research\, 141980\, Dubna\, Ru ssia\; \n\n2 MEPhI\, National Research NuclearUniversity\,115409\, Moscow\ , Russia\; \n\nE-mail: mark.povolotskiy@gmail.com \n\nThe results of measu rements of neutron detection efficiency ε(En)\, En ≈ 1.25 ÷ 5.75 MeV f or \n\nscintillation CeBr3 detector of MULTI setup [1] are presented. The measurements of the energy dependence of efficiency ε(En) were carried o ut by tagged neutron method using 239Pu/9Be n-γ source. \n\nTrigger-dete ctor was used for registering γ-quanta Eγ = 4.44 MeV accompanied by ~60% of events of neutron emission from source 239Pu/9Be. Neutron energy value s was taken from the time of flight (TOF) measurements. \n\nThe ε(En) m easurements have shown that CeBr3 detector have a relatively high neutron detection efficiency which is weakly dependent on the energy values in the region En≈1.25÷5.75 MeV. For example\, efficiency is ε(En)≈24\,6% i n energy range En=1.25÷5.75 MeV at the threshold 60 keV for CeBr3 detecto r (5×5×5 сm3). It was found that efficiency have strong dependence on t hreshold values\, see Fig 1. The mean efficiency as a function of thresho ld values is presented in Fig 1. \n\nIn comparison stilbene detectors that are often used for neutron detection have good n-γ pulse shape separatio n\, but sharp energy dependence of the efficiency ε(En). \n\nThis resear ch was funded by the Russian Science Foundation\, project No. 24-22-00117. \n\n1. Zeinulla Z. et al. GAMMA-RAY SPECTROMETER ASSEMBLED FROM 9× CeBr3- NaI (Tl) PHOSWICH DETECTORS //Acta Physica Polonica B\, Proceedings Supple ment. – 2021. – Т. 14. – №. 4. – С. 755-760. \n\n2. Siváček I. et al. The MULTI spectrometer for measurement of β-decay process in ex otic nuclei //EPJ Web of Conferences. – EDP Sciences\, 2021. – Т. 253 . – С. 01003.\n\nhttps://indico.particle.mephi.ru/event/436/contributio ns/4191/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4191/ END:VEVENT BEGIN:VEVENT SUMMARY:Automation of calculations of angular distributions of differentia l cross sections of reactions DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4168@cern.ch DESCRIPTION:Speakers: Semyon Raidun (NRC Kurchatov institute)\nIn this pap er\, a set of programs is presented that allow obtaining angular distribut ions. For testing\, the reaction 10В(7Li\, 6Li)11В was used at an incide nt beam energy of 58 MeV. The experiment was done using the U-400 accelera tor beam of the FLNR JINR\, Dubna. One of the goals of the experiment was to study the excited states of the 11B nucleus. The obtained differential cross sections are planned to be described using the Distorted Wave Born A pproximation method (DWBA).\n\nhttps://indico.particle.mephi.ru/event/436/ contributions/4168/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4168/ END:VEVENT BEGIN:VEVENT SUMMARY:Studying of SuperFGD response using stopped cosmic muons DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4215@cern.ch DESCRIPTION:Speakers: Nikita Mashin ()\, Nataliya Skrobova ()\nThe SuperFG D (Super Fine-Grained Detector) is a part of ND280 near\n detector complex for T2K and Hyper-Kamiokande experiments. The\n SuperFGD is a fully activ e and highly granular scintillator neutrino\n detector. It consists of ∼ 2 million scintillation cubes\, which allow\n reconstruction of particles going in all directions. A good\n understanding of SuperFGD response is cr ucial for detailed Monte-Carlo\n simulations and further physics studies. This poster covers selection\n of atmospheric muons stopped inside the sen sitive volume of the\n detector including their decays. Muons were selecte d by applying\n geometrical constraints and searching for subsequent elect ron or\n positron. The reconstructed spectrum of the Michel e-/e+ is usefu l for\n energy scale determination. Bragg’s curve built using muon energ y\n release along its track is sensitive not only to energy scale but also \n to the nonlinear effects: Birks coefficient and Cherenkov radiation\n i ntensity. Reconstruction of Compton electrons following positron\n annihil ation allows to evaluate an effective low energy threshold.\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4215/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4215/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of calculation of the cosmological perturbation spectrum in the framework of Mukhanov’s gauge-invariant approach. DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4165@cern.ch DESCRIPTION:Speakers: Darya Kislyakova (Department of Theoretical and Comp utational Physics\, Southern Federal University)\nThe purpose of the prese nt work is calculation of the cosmological perturbation spectrum in a flat model with a scalar field in the slow-roll regime. Mukhanov’s gauge-inv ariant approach for calculating the spectrum of gravitational perturbation s is analyzed. In contrast to Mukhanov’s paper [1] we calculate perturba tion spectrums of gravitational and scalar fields separately. We use actio n of the system in the invariant form\, quadratic for perturbations. Obtai ned expression leads to the equations for gravitational and scalar perturb ations\, by using slow-roll approximation. To calculate the perturbation s pectrum\, we need to solve these equations. As shown the solutions are amb iguous and depends on chosen approximations\, so we are not able to obtain clear-cut solutions. So\, it is desirable to look for other approaches to solve the discussing problem.\n\n\n[1] Mukhanov V. F.\, Feldman H. A.\, B randenberger R. H. Theory of cosmological perturbations. // Phys. Rep. 19 92. Vol. 215. P. 203 – 233\n\nhttps://indico.particle.mephi.ru/event/43 6/contributions/4165/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4165/ END:VEVENT BEGIN:VEVENT SUMMARY:Electron String Ion Source (ESIS) Ion Trap Control System Developm ent DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4213@cern.ch DESCRIPTION:Speakers: Elizaveta Butenko (JINR)\nThe Electron String Ion So urce (ESIS) is type of electron beam ion source working in a reflex mode u nder specific conditions. The operation is based on step-by-step ionizatio n of the ions by hitting with electrons of an electron string. ESIS is a c omplex facility and ion trap control system is its important part. It affe cts ion beam formation process and transfer to NICA HILAC. The version\, w hich is under operation now is based on resistance divider. The new system is based on independent modules and could make operation process more fle xible. The paper describes development of the ESIS ion trap control system electronics\, its modifications and operation process.\n\nhttps://indico. particle.mephi.ru/event/436/contributions/4213/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4213/ END:VEVENT BEGIN:VEVENT SUMMARY:Portable muon telescope for measuring cosmic muon fluxes DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4188@cern.ch DESCRIPTION:Speakers: Sergei Kazartsev (JINR)\nThe monitoring of cosmic mu ons is an important and permanent task for low-background particle physics experiments at the surface and at shallow laboratory locations. Neverthel ess\, the monitoring itself at the current level of development of experim ental physics techniques is rather a methodical task\, so its automation s eems to be necessary. This paper presents such a system for the registrati on of cosmic muons on the basis of plastic scintillators. The telescope is a compact portable system of three detectors\, which allows to hold and c hange the zenith angle in automatic mode with the help of a built-in micro controller\, as well as to automate a series of measurements of the cosmic background. The results of laboratory measurements and measurements in th e conditions of a nearby nuclear power reactor are presented.\n\nhttps://i ndico.particle.mephi.ru/event/436/contributions/4188/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4188/ END:VEVENT BEGIN:VEVENT SUMMARY:Background rejection in ECal detector MPD experiment cosmic test d ata DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4187@cern.ch DESCRIPTION:Speakers: Gleb Fomenko (NRC «Kurchatov Institute»\, Russia 1 23182\, Moscow\; NRNU MEPhI\, Russia 115409\, Moscow)\nThe MPD detector at the NICA facility is under construction. One of the key subsystems of the MPD experiment is the electromagnetic calorimeter ECal. The ECal modules are calibrated using cosmic muons. Signal from SiPM of each tower is digit ized by the ADC in a 640 ns window. The purpose of the calibration procedu re is to establish a correct relation between the measured signal and real energy deposition of the muon in the tower material. But there are many p rocesses that can deteriorate this correlation. Among them are random cosm ic particles\, large noise pulses\, crosstalk in SiPM cells\, etc. In this contribution\, we present a simple and fast method for suppressing such b ackground. It is based on the analysis of the ratio of the signal integral to the maximal amplitude. For good events\, a good parametrization of the dependence of the ratio on the signal amplitude was found. The compatibil ity of the parametrizations evaluated for 768 towers of one half-sector is discussed. Selection criteria for background rejection and their efficiec ny as well as contribution of the crosstalk to the backgrouns are presente d and analyzed. The contribution of the crosstalk to the background was es timated.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4187/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4187/ END:VEVENT BEGIN:VEVENT SUMMARY:SOFTWARE PACKAGE FOR DATA COLLECTION USING CAEN BOARDS DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4211@cern.ch DESCRIPTION:Speakers: Maxim Dovbnenko (JINR)\nThe results of the developme nt of a DAQ (data acquisition) system for collecting and processing data f rom Flash ADC and TDC (time to digital converter) blocks by Caen are prese nted. A comparative analysis of the speed characteristics of data transmis sion over the Optical link and VMEbus bus of boards of different versions with different initial configurations of internal memory buffers\, as well as by type of connection to a personal computer\, was carried out. A vari ant of organizing data collection is shown\, both in single block mode and in multiple connection mode via the Caen v2718-v3718 controller using an interrupt mechanism. The approach of client-server interaction between the main DAQ system and the remote user interface is described. A brief overv iew of intermediate data caching\, methods and types of writing them to th e main storage medium is given. A brief overview of the implemented functi onality for processing accumulated spectra is given\, including calibratio n tools\, automatic detection of peaks in a given area and point-to-point spectrum investigation.\n\nhttps://indico.particle.mephi.ru/event/436/cont ributions/4211/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4211/ END:VEVENT BEGIN:VEVENT SUMMARY:The study of the dimuons production in the NA64 experiment. DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4412@cern.ch DESCRIPTION:Speakers: Natalya Gerassyova ()\nThe main goal of the NA64 exp eriment is searching for sub-GeV dark matter production mediated by a dark photon A' or light dark boson Z'. Dimuons are used to check the accuracy of the Monte-Carlo simulation of the NA64 setup based on the Geant4 packag e. They also represent a background source in the dark sector search.\n\nh ttps://indico.particle.mephi.ru/event/436/contributions/4412/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4412/ END:VEVENT BEGIN:VEVENT SUMMARY:Atmospheric neutrino detection efficiency estimation in the NOvA e xperiment. DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4271@cern.ch DESCRIPTION:Speakers: Aleksandra Ivanova (JINR\, ISU)\nThe NOvA experiment aims to study neutrino oscillation parameters using an accelerator comple x. Far detector big size and high segmentation structure as well as a flex ible system of software triggers and data acquisition allows to detect the atmospheric neutrinos and study their parameters in NOvA.\n\nThis work pr esents the developed technique of atmospheric neutrinos registration in th e far detector: the selection and reconstruction of triggers\, the calcula tion of their efficiency for background and signal events\, and finally th e expected energy spectrum of atmospheric neutrinos.\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4271/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4271/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for invisible decays of rho0 in NA64 DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4411@cern.ch DESCRIPTION:Speakers: Svetlana Gertsenberger (JINR)\nThe NA64 experiment a t the CERN SPS is designed to search for dark photons in events with missi ng energy. The most studied production mechanism is dark Bremsstrahlung th rough a vector mediator. Bremsstrahlung photons can convert to hard vector mesons in exclusive photoproduction processes\, which then decay to dark matter (DM). The vector meson decays invisibly to DM via mixing with the d ark photon. The possibility of rho0 invisible decay will be shown.\n\nhttp s://indico.particle.mephi.ru/event/436/contributions/4411/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4411/ END:VEVENT BEGIN:VEVENT SUMMARY:Amplitude analysis approach in the experimental studies of exotic hadrons DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4407@cern.ch DESCRIPTION:Speakers: Artem Vasyukov (Joint Institute for Nuclear Research )\nSearch and study of exotic hadrons - tetraquarks and pentaquarks - is o ne of topical problems in modern high energy physics. To determine spin-pa rity of these states\, test theoretical predictions of their spectra and r eveal the internal structure - high-precision measurements of their parame ters are required. Amplitude analysis is a recognized tool for solving thi s problem. In this report\, the details of amplitude analysis approaches t ogether with practical examples of their application will be presented.\n\ nhttps://indico.particle.mephi.ru/event/436/contributions/4407/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4407/ END:VEVENT BEGIN:VEVENT SUMMARY:Particle identification in MPD at NICA using machine learning DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4406@cern.ch DESCRIPTION:Speakers: Pavel Gordeev ()\nParticle identification is importa nt in almost any high-energy physics analysis\, but in some measurements s uch identification becomes crucial. Such analyses are the measurement of d irect photon spectra and correlations\, where the signal is comparable wit h possible contamination and the measurement of e+e- mass distribution as electrons are a tiny part of all tracks reconstructed in AA collision.\nIn this presentation we discuss improvements in particle identification in M PD detector at the future NICA facility that can be achieved by applying m achine learning approach for particle identification in MPD tracking syste m and electromagnetic calorimeter ECAL.\n\nhttps://indico.particle.mephi.r u/event/436/contributions/4406/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4406/ END:VEVENT BEGIN:VEVENT SUMMARY:Supernova neutrino distribution: data and their approximation appr oach DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4108@cern.ch DESCRIPTION:Speakers: Eugenia Koptyaeva ()\nTo obtain the neutrino paramet ers in core-collapse supernova we use the results of a one-dimensional sim ulation of neutrino propagation\, performed self-consistently with hydrody namics in Prometheus-Vertex code. As in most modern model of neutrino prop agation in supernova\, in this numerical code the moments approach is appl ied for calculation of neutrino transport. This method is based on the sep aration of neutrino energy range to bins and allows to get us only the int egral value of neutrino specific intensity in them. In this case\, the sim plest way to find the neutrino radiation parameters is to use total integr al energy moments. But this approach does not allow to obtain neutrino rad iation parameters for some analytical models\, for example\, for a popular Fermi-like approximation of the neutrino energy spectrum. Because of that \, we use method based on the minimization of the functional\, which deter minates the deviation of integral value of the model spectrum from the dat a performed with Prometheus-Vertex code. This approach of finding of neutr ino radiation parameters allows us to more accurately approximate the data \, and it can be used in case when the approach of energy moments are not applicable.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/41 08/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4108/ END:VEVENT BEGIN:VEVENT SUMMARY:“Search for sub-microsecond bursts of Cherenkov radio emission c aused by the interaction of high-energy neutrinos with lunar regolith” DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4107@cern.ch DESCRIPTION:Speakers: Sergei Shavkovich (PUShGU)\nG.A. Askaryan had shown in 1960s [1\,2] that the interaction of high-energy particles with the rat her dense dielectric medium should form the negative charged cascades mov ing with superluminal velocity in the medium. This Askaryan’s effect is laid on the basis of the radio-astronomical method for detecting ultra-hi gh-energy neutrinos\, proposed later by R.D.Dagkesamansky and I.M. Zhelezn ykh [3]. This report provides a brief overview of the application of this radio astronomy method to search for Cherenkov radio bursts from the Moon . Some results of the search for such radio bursts on the meter wave radi o telescope BSA FIAN are presented.\n\nhttps://indico.particle.mephi.ru/ev ent/436/contributions/4107/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4107/ END:VEVENT BEGIN:VEVENT SUMMARY:The GNA software for performing neutrino oscillation analysis DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4265@cern.ch DESCRIPTION:Speakers: Anna Stepanova (JINR)\nCurrently\, there is a wide v ariety of different neutrino oscillation experiments which collect data of neutrino interactions before and after their oscillations. To process and analyze these data it is necessary to have a reliable and highly efficien t computing software. GNA (Global Neutrino analysis) is a software develop ed at JINR to carry out neutrino oscillation analysis of various experimen ts such as reactor\, accelerator\, atmospheric\, and solar ones. It has be en actively developing to provide global fit of data taken from different types of experiments. This poster will show in details the features and be nefits of using the GNA software to perform neutrino oscillation analysis. \n\nhttps://indico.particle.mephi.ru/event/436/contributions/4265/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4265/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino spin and spin-flavor oscillations in non-dipolar magnetic fields of astrophysical objects DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4264@cern.ch DESCRIPTION:Speakers: Degang Wang ()\nAbstract:\nWithin the minimally exte nded Standard Model\, neutrinos possess non-zero anomalous magnetic moment s. As a result\, strong magnetic fields can induce spin and spin-flavor ne utrino oscillations\, which may affect neutrino fluxes from astrophysical sources. We study the neutrino evolution in realistic magnetic fields and moving matter of astrophysical objects such as supernova bursts and neutro n stars. For the first time\, we have derived an effective Hamiltonian for neutrinos propagating in non-dipolar magnetic fields\, and we have obtain ed appropriate probabilities for neutrino spin and spin-flavor oscillation s. The importance of the work is highlighted by the construction of new Me ga-Science neutrino experiments\, such as JUNO\, Hyper-Kamiokande\, Baikal GVD and others.\n\nhttps://indico.particle.mephi.ru/event/436/contributio ns/4264/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4264/ END:VEVENT BEGIN:VEVENT SUMMARY:On the possibility of using scintillation material Li2CaSiO4:Eu2+ in solid-state reactor antineutrino detectors. DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4259@cern.ch DESCRIPTION:Speakers: A. Rastimeshin (National Research Centre «Kurchatov Institute»\, National Research Nuclear University «MEPhI»)\nAt the pre sent time\, a scintillation material $^6$Li$_2$CaSiO$_4$:Eu$^{2+}$ (LCS) i s being developed at the NRC “Kurchatov Institute”. This material is d esigned for neutrons registration by capturing by the $^6$Li isotope. The work presents the possibility of using LCS for neutrons detection after th e inverse beta decay reaction ($\\bar{\\nu_e} + p \\rightarrow n+e^{+}$)\, which is widely used for antineutrinos registration in reactor experiment s. It is shown that when using LCS in combination with a plastic scintilla tor (EJ-200\, which acts as a target for antineutrinos and registers posit rons)\, selection by pulse shape allows the signals of two scintillators t o be separated\, which demonstrates the possibility of using this material in antineutrino experiments.\n\nhttps://indico.particle.mephi.ru/event/43 6/contributions/4259/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4259/ END:VEVENT BEGIN:VEVENT SUMMARY:Estimation of the efficiency of EAS registration by the imaging at mospheric cherenkov telescope depending on the position of the source in the field of view. DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4098@cern.ch DESCRIPTION:Speakers: Pavel Bezyazeekov (JINR)\nObservations of extensive air-showers is characterized by the combination of a relatively narrow fie ld of view of the telescope with an even narrower angle of propagation of Cherenkov light from the shower. \nWith increasing distance between telesc ope and shower axis a part of the observed image of the event goes beyond the field of view of the telescope\, which complicates the reconstruction of the primary particle parameters. \nIn the present study we discuss of t he distribution of the efficiency of \nof such events depending on positio n of observed source image in the field of view in mono and stereo modes.\ n\nhttps://indico.particle.mephi.ru/event/436/contributions/4098/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4098/ END:VEVENT BEGIN:VEVENT SUMMARY:Supernova Neutrino Search and Underground Physics at LVD DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4293@cern.ch DESCRIPTION:Speakers: Vsevolod Ashikhmin (INR RAS)\nThe Large Volume Detec tor located in the Gran Sasso Laboratory\, Italy\, has been operating in t he stellar core collapse neutrino search program since 1992. Based on 32 y ears of detector data\, an experimental constraint on the frequency of neu trino bursts from gravitational collapses of stars in the Galaxy has been obtained: less than 1 event in 13.9 years at a 90% confidence level. At an average depth of 3650 m w.e.\, the detector registers atmospheric muons w ith an average energy of 280 GeV in the angular range of 0 – 90. The det ector background in the low-energy range from 0.5 to 3 MeV is the natural radioactivity of the soil\, the iron structures of the detector\, and rado n decay products in the room air. Variations in gamma quanta and muons are continuously monitored as the detector background when searching for neut rinos from supernovae. The paper presents the latest results of the analys is of the experimental data from the LVD detector.\n\nhttps://indico.parti cle.mephi.ru/event/436/contributions/4293/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4293/ END:VEVENT BEGIN:VEVENT SUMMARY:Nucleon effective mass and the ground-state properties DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4177@cern.ch DESCRIPTION:Speakers: Dmitrij Smoliannikov (Joint Institute for Nuclear Re search)\nTheoretical and experimental investigations of neutron-rich nucle i represent one of the most fascinating and abundant sources of new inform ation about nuclear structure. The varied properties of atomic nuclei impo se significant requirements on theoretical approaches. One of the most eff ective microscopic methods for investigating ground-state properties is th e Hartree-Fock (HF) approach\, which utilizes a self-consistent mean-field based on the Skyrme energy density functional (EDF) [1]. The HF calculati ons with the Skyrme interactions provide a rather satisfactory description of the radii\, binding energy\, and single-particle (s.p.) energy of magi c nuclei. However\, the calculated density of the s.p. states near the Fer mi level is less than what has been observed experimentally.\n\nThe s.p. s tates around the Fermi energy are known to be strongly affected by the nuc leon effective mass profile at the surface. As shown in [2]\, the isoscala r correction term in the Skyrme EDF produce a surface-peaked effective mas s. These dynamical correlations demonstrate that the density of states inc reases as the effective mass gets enhanced at the surface of nuclei [2\,3] . The inclusion of the correction term in the Skyrme EDF leads to a declin e in the accuracy of the binding energy description. In this work\, we rea djust the parameters of the Skyrme interaction and isoscalar correction te rm in order to reach more accurate description of binding energies and den sity of the s.p. states near the Fermi level [4]. As an illustration\, we study impact of surface-peaked effective mass on the ground-state properti es of magic nuclei 40\,48Ca 132Sn\, and 208Pb.\n\nThe research was support ed within the framework of the scientific program of the National Center f or Physics and Mathematics\, topic no. 6 “Nuclear and Radiation Physics ” (stage 2023-2025).\n\n[1] M. Bender\, P.-H. Heenen\, and P.-G. Reinhar d\, Rev. Mod. Phys. 75\, 121(2003).\n\n[2] A.F. Fantina\, J. Margueron\, P . Donati\, and P.M. Pizzochero\, J. Phys. G: Nucl. Part. Phys. 38\, 025101 (2011).\n\n[3] A.P\, Severyukhin\, J. Margueron\, I.N. Borzov\, and N.V. Giai\, Phys. Rev. C. 91\, 034322 (2015).\n\n[4] D.Yu. Smolannikov\, N.N. A rsenyev\, A.P. Severyukhin\, in preparatio\n\nhttps://indico.particle.meph i.ru/event/436/contributions/4177/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4177/ END:VEVENT BEGIN:VEVENT SUMMARY:The Schrödinger equation for a spherically symmetric system\, its structure\, and the interpretation of its solutions. DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4152@cern.ch DESCRIPTION:Speakers: Roger Ayala Oña (Southern Federal University)\nThe Wheeler–DeWitt geometrodynamics\, which was the first attempt to develo p a quantum theory of gravity\, faces some problems\, such as the problem of time or the interpretation of the wave function. In this work\, as an a lternative to Wheeler–DeWitt quantum geometrodynamics\, we consider the extended phase space formalism. Within this framework\, one can derive the Schrödinger equation\, which describes the evolution of a physical objec t over time and incorporates gauge degrees of freedom. This work generaliz es the existing quantization method for models with a finite number of deg rees of freedom\, as proposed by Cheng\, and enables us to derive the Schr ödinger equation for systems described by field functions. As a result of our research\, the integro-differential Schrödinger equation for a centr ally symmetric model was obtained\, its structure was studied\, and its so lution was interpreted. Additionally\, the analytic solutions of the Wheel er-DeWitt equation and the Schrödinger equation were compared in the gaug e condition N=1/V\, corresponding to the Schwarzschild solution\, and in t he gauge condition N=1\, corresponding to the Tolman solution.\n\nhttps:// indico.particle.mephi.ru/event/436/contributions/4152/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4152/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the scintillation experiment of the TAIGA astrophysical complex DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4094@cern.ch DESCRIPTION:Speakers: Evgeniy Kravchenko (Novosibirsk State University/Bud ker Institute of Nuclear Physics)\nIn 2019\, as part of the development of the TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma Astronomy) astrophysical complex\, construction of the TAIGA-Muon scintillation faci lity began in addition to the existing Tunka-Grande system. The main objec tive of these systems is to study the energy spectrum and mass composition of cosmic rays in the energy range of $10^{15}–10^{18}$ eV\, as well as to search for gamma radiation in the same energy range. Original detector s have been developed for the TAIGA-Muon facility that use light guides wi th spectrum re-emitters to collect light on the PMT. Currently\, 5 out of 10 planned stations (clusters) have been deployed. Each station contains a ground part for detection of the charged component of the EAS and an unde rground part for the muon component registration.\nThe report\, firstly\, presents the objectives and status of the facility\, a description of the design of scintillation counters and clusters\, as well as the structure o f data collection\, time synchronization\, control and monitoring systems. The results of the study of EAS with an unusual spatiotemporal structure are presented. It is assumed that the nature of the pulses with a multipea k structure and multipulse signals observed in the Tunka-Grande detectors is associated with random coincidences from single atmospheric muons\, PMT afterpulses\, and features of the spatiotemporal structure of the EAS. Th e report also presents the results of a study of the joint operation of th e Tunka-Grande and TAIGA-HiSCORE setups in order to search for sub-PeV gam ma quanta. Estimates are made of the expected number of registered gamma q uanta from the Crab Nebula. The work was supported by the Russian Science Foundation\, project 23-72-00054.\n\nhttps://indico.particle.mephi.ru/even t/436/contributions/4094/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4094/ END:VEVENT BEGIN:VEVENT SUMMARY:APPLICATION OF THE CLARIFIED DATABASE OF PARAMETERS OF β− ACTIV E ATOMIC NUCLEI FOR ANTINEUTRINO SPECTRUM CALCULATION DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4292@cern.ch DESCRIPTION:Speakers: Svetlana Ingerman (INR RAS)\nThe paper presents a cl arified database of the parameters of beta-active nuclei\, which includes previously unknown and inaccurately estimated parameters. The parameters w ere obtained by using our developed method of converged sequence of calcul ated energy spectra to the resulting spectrum\, which is most close to the experimental one. Rovno experimental spectrum was taken as the experiment al one. Beta-active nuclei parameters used for calculating the resulting s pectrum were included in clarified database. The use of this data base all ows to get the best coincidence of calculated antineutrino spectrum with t he measured one at any nuclear reactor core content.\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4292/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4292/ END:VEVENT BEGIN:VEVENT SUMMARY:Separation of QCD and EWK processes of vector diboson production u sing machine learning algorithms with third-jet information. DTSTART;VALUE=DATE-TIME:20241025T070000Z DTEND;VALUE=DATE-TIME:20241025T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4359@cern.ch DESCRIPTION:Speakers: Dmitriy Zubov (NRNU MEPhI)\nRare processes which occ ur via the electroweak interactions play a very important role among the v ector boson production processes. Such processes are of interest both from the perspective of precision tests of the Standard Model\, in particular for the investigation of the mechanism of electroweak symmetry breaking\, and from the perspective of search for physics beyond the Standard Model v ia anomalous gauge boson couplings. One of the main difficulties in the st udy of EWK productions is the separation of signal events from the dominan t QCD background processes of vector boson production. A series of studies have shown an additional suppression power for the vector diboson QCD pro duction processes with respect to EWK using the third hadronic jet rapidit y. In this study\, we present a technique for applying the machine learnin g algorithms to separate the QCD and EWK processes of vector diboson produ ction using additional information about the third jet in the case of the process of $ZZ$ pair production and subsequent decay to the $\\ell\\ell\\n u\\nu$ final state.\n\nhttps://indico.particle.mephi.ru/event/436/contribu tions/4359/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4359/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of neutral triple gauge couplings sensitivity to new physics manifestations using augmented vertex function approach with $Z(\\nu\\bar {\\nu})\\gamma$ production DTSTART;VALUE=DATE-TIME:20241025T064500Z DTEND;VALUE=DATE-TIME:20241025T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4363@cern.ch DESCRIPTION:Speakers: Alena Chekhonina (NRNU MEPhI)\nThe most successful t heory describing elementary particles\, Standard Model (SM)\, can not expl ain some already observed phenomena\, so it needs an extension. Any new ob served manifestation of the new physics phenomenon brings the construction of a more general theory closer\, since it provides new necessary informa tion. The study reported in this talk contains an indirect model-independe nt way\, vertex function approach\, which is used for searching more physi cs phenomena beyond the SM. This approach allows one to parameterize neutr al triple gauge couplings (nTGC) which are prohibited in the SM. The $Z(\\ nu\\bar{\\nu})\\gamma$ production in pp collisions is used to study nTGC. Expected one-dimension limits on 12 vertex parameters are set under the co nditions of Run II and Run III of the ATLAS experiment (LHC). Four aforeme ntioned parameters have not been studied at the LHC experiments before. Tw o-dimensional correlation contours are also studied in this work. This ana lysis shows that in future the most strict limits may be set by using the $Z(\\nu\\bar{\\nu})\\gamma$ production. Moreover\, the problem of unitarit y violation is also considered in the work. Unitarity bounds have been cal culated for several coefficients\, and all the limits are found to be unit arized.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4363/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4363/ END:VEVENT BEGIN:VEVENT SUMMARY:Prospects of search for CP-violating effects of neutral triple gau ge couplings at the LHC DTSTART;VALUE=DATE-TIME:20241025T063000Z DTEND;VALUE=DATE-TIME:20241025T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4358@cern.ch DESCRIPTION:Speakers: Artur Semushin (NRNU MEPhI)\nThe main goal of modern experiments in high-energy-physics area is to find deviations from the St andard Model (SM)\, which describe data well but is expected to be extende d to a more general theory. Anomalous coupling approach provides a possibi lity to look for a wide range of new physics effects in different experime ntal signatures thanks for its model-independence. In this work the neutra l triple gauge couplings (nTGCs) are considered in $ZZ(\\ell\\ell\\nu\\nu) $ and $Z(\\ell\\ell)\\gamma$ channels\, and effective field theory is used to parameterize these couplings in the Lagrangian. NTGCs are triple inter actions between $Z$ bosons and photons\, and some of them violate CP. Ofte n constraints on CP-violating nTGCs are set basing on CP-conserving effect s\, and therefore CP violation is not probed in these studies. This work p resents a study of CP-sensitive variables in the aforementioned channels u sing special angular variables and matrix-element-based optimal observable s. Basing on these variables\, one- and two-dimensional expected limits on the nTGCs are set for the conditions of Run3 at LHC experiments. This stu dy shows the possibility to search for CP-violation using nTGC framework a nd special CP-sensitive variables. These variables also can be used in oth er channels and with different parameterizations of the Lagrangian.\n\nhtt ps://indico.particle.mephi.ru/event/436/contributions/4358/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4358/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing Neutral Triple Gauge Couplings via Zγ(ℓ+ℓ−γ) Produ ction at e+e− Colliders DTSTART;VALUE=DATE-TIME:20241025T061500Z DTEND;VALUE=DATE-TIME:20241025T063000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4364@cern.ch DESCRIPTION:Speakers: Danning Liu (TDLI\, SJTU)\nRef. arXiv:2404.15937 [he p-ph]\n\nNeutral triple gauge couplings (nTGCs) are absent in the Standard Model (SM) and at the dimension-6 level in the Standard Model Effective F ield Theory (SMEFT)\, arising first from dimension-8 operators. As such\, they provide a unique window for probing new physics beyond the SM. These dimension-8 operators can be mapped to nTGC form factors whose structure i s consistent with the spontaneously-broken electroweak gauge symmetry of t he SM. In this work\, we study the probes of nTGCs in the reaction $e^{+}e ^{−}$→Zγ with Z→ℓ$^{+}$ℓ$^{−}$(ℓ=e\,μ) at an e$^{+}$e$^{ −}$ collider. We perform a detector-level simulation and analysis of thi s reaction at the Circular Electron Positron Collider (CEPC) with collisio n energy $\\sqrt{s}$ = 240 GeV and an integrated luminosity of 20 ab$^{− 1}$. We present the sensitivity limits on probing the new physics scales o f dimension-8 nTGC operators via measurements of the corresponding nTGC fo rm factors.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/43 64/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4364/ END:VEVENT BEGIN:VEVENT SUMMARY:Spin physics studies with polarized deuteron and proton beams at Nuclotron DTSTART;VALUE=DATE-TIME:20241023T140000Z DTEND;VALUE=DATE-TIME:20241023T142000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4370@cern.ch DESCRIPTION:Speakers: Vladimir LADYGIN (VBLHEP\, JINR)\nNuclotron complex gives the unique opportunity to study spin effects using polarized deutero n and proton beams from new polarized ion source. Recent results on the s pin effects in deuteron-proton and proton-proton elastic scattering are d iscussed. The data on the deuteron analyzing powers Ay\, Ayy and Axx o btained at large transverse momenta in the energy range 400-1800 MeV demo nstrate the sensitivity to the short-range spin structure of the isoscalar nucleon-nucleon correlations. The data on the beam analyzing power in pr oton-proton quasi-elastic scattering can be used to improve the phase-sh ift analysis in the Nuclotron energy range of Nuclotron\n The perspectives of further progress in physics program as well as in the development of t he beam polarimetry and proton spin manipulation techniques are disscussed .\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4370/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4370/ END:VEVENT BEGIN:VEVENT SUMMARY:The effect of tidal deformations on the gravitational wave signal during neutron star mergers DTSTART;VALUE=DATE-TIME:20241023T144500Z DTEND;VALUE=DATE-TIME:20241023T150000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4151@cern.ch DESCRIPTION:Speakers: Irina KlopovaSaporovskaia ()\nThis work is devoted t o the analysis of the influence of tidal effects on the shape of the gravi tational signal from the fusion of neutron stars. The main part of the wo rk is divided into theoretical information\, analytical and numerical mode ls\, and practical implementation.\n\nThe theoretical section includes a d escription of the basic model for black holes and neutron stars\, as well as the methods used to add tidal effects. The basic model is based on the post-Newtonian approach\, which allows us to take into account the effects of interaction of compact objects without solving the Einstein equations. Within the framework of this model\, a differential equation arises descr ibing the evolution of the post-Newtonian parameter\, and it is further so lved in two different ways.\n\nThe practical part includes calculating the parameters of the model and solving the differential equation using maxim a code.\n\nThe discussion section of the results presents a comparison of numerical and analytical solutions. It turns out that the analytical solut ion allows you to look a little further in time and evaluate the behavior of the system at closer distances.\n\nThe conclusion summarizes the work p erformed\, indicating the fulfillment of the tasks set\, such as the analy sis of modern models\, calculation of coefficients for differential equati ons\, and comparison of the results obtained by different methods. In the future\, it is planned to continue work on calculating the shape of the gr avitational wave signal from merging black holes and adding tidal effects to the model for calculating the shape of gravitational waves.\n\nhttps:// indico.particle.mephi.ru/event/436/contributions/4151/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4151/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the BM@N experiment at NICA/Nuclotron DTSTART;VALUE=DATE-TIME:20241022T091000Z DTEND;VALUE=DATE-TIME:20241022T094500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4403@cern.ch DESCRIPTION:Speakers: Mikhail Kapishin (JINR)\nThe BM@N (Baryonic Matter a t Nuclotron) is the first fixed-target experiment performed at the NICA-Nu clotron accelerator complex. In central heavy nucleus-nucleus collision s at the Nuclotron beam energies\, baryon densities of 4-5 of the saturat ion density are reached. The primary goal of the experiment is to constra in parameters of the equation of state of high-density nuclear matter and search for the onset of the deconfinement phase transition. The main aspe cts of the physics program of the experiment and the relevant observables are discussed. \nPreviously\, the experiment recorded the first data in carbon-nucleus and argon-nucleus interactions at beam kinetic energies fro m 3.2 to 4.5 GeV per nucleon. In 2023 the physics run was performed wit h a xenon beam of 3.8 A GeV and 3.0 AGeV. The experiment recorded over 55 0 million Xe+CsI interactions in a full set of detectors. The experiment is currently on its way to studying relativistic interactions of heavy nuc lei up to Bi+Bi. \nFirst physics results of the experiment are presented on the yields of charged pi+\, K+\, proton\, deuteron and triton yields a nd their ratios in argon-nucleus interactions at a beam kinetic energy of 3.2 AGeV. Preliminary results on the production of Lambda\, K0s and the m easurement of direct collective flow of protons in Xe+CsI interactions are also discussed.\n\nhttps://indico.particle.mephi.ru/event/436/contributio ns/4403/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4403/ END:VEVENT BEGIN:VEVENT SUMMARY:A Monte Carlo study of the MPD performance for hyperon selection u sing machine learning techniques DTSTART;VALUE=DATE-TIME:20241025T094500Z DTEND;VALUE=DATE-TIME:20241025T100000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4395@cern.ch DESCRIPTION:Speakers: Dilyana Suvarieva ()\nStudy of the strangeness produ ction in heavy-ion collisions is one\nthe primary goals of the MPD experim ent at the NICA collider. To\ncollect sufficient statistics of (multi)stra nge particle decays\,\ntheir efficient selection from the high combinatori al background\nis required. Presumably\, solution of such a task can great ly benefit\nfrom multivariate analyses based on machine learning technique s.\nIn this work\, results of application of the machine learning approach es\,\nimplemented in the TMVA package of the ROOT framework\, are presente d\nfor Monte Carlo data event samples of heavy-ion collisions and compared with the results of the topological cuts selection method.\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4395/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4395/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance of the Fast Interaction Trigger(FIT) detector system f or global observables at ALICE in Run-3 DTSTART;VALUE=DATE-TIME:20241025T101500Z DTEND;VALUE=DATE-TIME:20241025T103000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4397@cern.ch DESCRIPTION:Speakers: Arthur Furs (INR RAS)\nThe primary purpose of the AL ICE experiment at the Large Hadron Collider (LHC) is to study the properti es of nuclear matter at extremely high temperatures and energy density pro duced by relativistic nucleus-nucleus collisions. During the Long Shutdown 2 (2019-2022)\, new detectors were incorporated into the ALICE setup\, in cluding a Fast Interaction Trigger (FIT). The FIT detector system consists of three sub-detectors based on different technologies: FDD\, FT0 and FV0 . In addition to online functionality\, the FIT data are used offline for multiplicity\, centrality\, collision time\, event-plane determination\, v ertex position\, and veto for diffractive and ultra-peripheral heavy-ion c ollisions. These global observables are essential for event characterizati on and the study of nuclear matter properties. This presentation will give a preliminary overview of FIT's performance in the extraction of global o bservables from pp and A-A collisions during the LHC Run 3.\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4397/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4397/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutral meson production results in pp\, p--Pb and Pb--Pb collisio ns in ALICE DTSTART;VALUE=DATE-TIME:20241025T100000Z DTEND;VALUE=DATE-TIME:20241025T101500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4396@cern.ch DESCRIPTION:Speakers: Dmitry Averyanov (NRC "Kurchatov Institute")\nIn hig h-energy hadronic collisions neutral meson spectra can be measured with hi gh precision in a wide range of transverse momenta\, providing valuable in put for the nucleon structure functions parametrization and for studying i n great detail the cold and hot matter effects.\n\nThe ALICE experiment at the LHC provides the possibility to measure photons in large acceptance E MCAL or precise PHOS calorimeters and to reconstruct photons converted in e+e- pairs and reconstructed in the central tracking system. Simultaneous measurement of neutral meson spectra with different methods provides good cross-check of the measurements and allows one to dramatically reduce unce rtainties.\n\nIn this talk we present recent results from ALICE on the neu tral meson measurements in pp\, p--Pb\, and Pb--Pb collisions at LHC energ ies based on the data collected in LHC Run 2 and the performance of ALICE in LHC Run 3.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/ 4396/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4396/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of phi meson production in the BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T091500Z DTEND;VALUE=DATE-TIME:20241025T093000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4399@cern.ch DESCRIPTION:Speakers: Ramin Barak ()\nThis work is devoted to the search f or phi mesons after collision of Xe beams with a CsI target at E = 3.8 AGe V at the BM@N experiment (JINR\, Dubna). Both MC and experimental data wer e considered and peaks in the invariant mass distribution corresponding to phi mesons were obtained. Analysis of reconstruction efficiency was perfo rmed. The future aim is to increase our understanding of the transition fr om baryonic matter to (quark-gluon plasma) QGP.\n\nhttps://indico.particle .mephi.ru/event/436/contributions/4399/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4399/ END:VEVENT BEGIN:VEVENT SUMMARY:Reconstruction of photons and neutral mesons in heavy-ion collisio ns with MPD at NICA DTSTART;VALUE=DATE-TIME:20241025T093000Z DTEND;VALUE=DATE-TIME:20241025T094500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4398@cern.ch DESCRIPTION:Speakers: Yonghong Wang (Shandong University)\nThe Multi-Purpo se Detector (MPD)\, currently under construction at the NICA complex at JI NR\, is designed to be the primary experiment for studying heavy-ion colli sions in the energy range of $\\sqrt{s_{NN}}$ =4−11 GeV. The MPD aims to explore the baryon-rich region of the QCD phase diagram to investigate th e possible existence of a first-order phase transition and a critical end- point. The measurement of direct photon and neutral meson production is a key part of the MPD physics program.\n\nWe will present results of physics feasibility studies for photon and neutral mesons ($\\pi^{0}$ and η) re construction with the MPD detector in Bi+Bi collisions at $\\sqrt{s_{NN}}$ = 9.2 GeV simulated using realistic event generators. Photon measurements are performed using two methods\, including the identification of photon clusters in the electromagnetic calorimeter (ECAL) and the reconstruction of photons in the tracking system as dielectron pairs produced through con versions in detector materials (PCM). Neutral meson signals are analyzed u sing the invariant mass method by combining photon pairs from ECAL-ECAL\, PCM-PCM\, and ECAL-PCM sources\, with the uncorrelated combinatorial backg round estimated through the event-mixing technique. The measured $\\pi^{0} $ and η transverse momentum spectra are compared to truly generated ones to estimate robustness of the developed reconstruction procedures.\n\nhttp s://indico.particle.mephi.ru/event/436/contributions/4398/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4398/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of neutron emission at large angles in Xe + CsI collisions a t 3.8 A GeV DTSTART;VALUE=DATE-TIME:20241025T090000Z DTEND;VALUE=DATE-TIME:20241025T091500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4402@cern.ch DESCRIPTION:Speakers: Nikita Lashmanov (JINR)\nNeutron energy spectra were measured in the energy range 2 – 200 MeV for emission angles of 95°\, 110° and 121° in collisions of 124Xe nuclei with a CsI target at a beam energy of 3.8 GeV/nucleon. The measurement was carried out with a compact TOF spectrometer in the last run of the BM@N experiment. The spectrometer characteristics and data analysis are discussed. The studied region of ang les corresponds to neutrons emitted during the decay of spectators of the target nuclei. The resulting neutron energy spectra are well described by phenomenological model of three moving sources. In the energy region below 15 MeV\, the angular distribution is isotropic. It indicates that the vel ocity of this neutron source is close to zero. The obtained neutron spectr a are compared with results of theoretical models.\n\nhttps://indico.parti cle.mephi.ru/event/436/contributions/4402/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4402/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of Λ-hyperon production in carbon-solid target collision s in the BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T084500Z DTEND;VALUE=DATE-TIME:20241025T090000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4401@cern.ch DESCRIPTION:Speakers: Ksenia Alishina (JINR VB LHEP)\nBM@N (Baryonic Matte r at Nuclotron) is the first fixed target experiment collecting data at th e NICA accelerator. The goal of BM@N physics program is a study of highly compressed nuclear matter in heavy ion beams. The Nuclotron provides heavy ion beams with energies from 2.3 to 4.5 AGeV\, which is suitable for stud ies of strange mesons and multi–strange hyperons produced in nucleus-nuc leus collisions close to the kinematic threshold.\nThe BM@N experiment col lected its initial data using a carbon beam with kinetic energies of 4.0 a nd 4.5 AGeV and a set of solid targets\, including Al\, C\, Cu\, and Pb. T his paper outlines the methodology for calculating cross sections and meas uring yields in the Λ→p+π- decay channel. Additionally\, the results i nclude estimates of the temperature inside the fireball\, obtained from th e inverse distributions of transverse momenta.\n\nhttps://indico.particle. mephi.ru/event/436/contributions/4401/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4401/ END:VEVENT BEGIN:VEVENT SUMMARY:Machine Learning-based Neutron Reconstruction in the HGND at the B M@N experiment DTSTART;VALUE=DATE-TIME:20241025T083000Z DTEND;VALUE=DATE-TIME:20241025T084500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4400@cern.ch DESCRIPTION:Speakers: Vladimir Bocharnikov (HSE University)\nThe Highly Gr anular Neutron Detector (HGND) is designed for the BM@N experiment to stud y neutron emission in heavy ion collisions at beam energies up to 4A GeV. This detector allows the identification of neutrons and the reconstruction of their energies using time-of-flight method\, facilitating the assessme nt of neutron yields and azimuthal flow. The challenging neutron energy ra nge of $0.5-4$ GeV and large background contributions require sophisticate d reconstruction algorithms. In this contribution\, we present a machine l earning-based approach to the neutron reconstruction problem and discuss p reliminary results of the proposed algorithm.\n\nhttps://indico.particle.m ephi.ru/event/436/contributions/4400/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4400/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of Bc+ decays at CMS DTSTART;VALUE=DATE-TIME:20241024T155000Z DTEND;VALUE=DATE-TIME:20241024T160500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4387@cern.ch DESCRIPTION:Speakers: Aleksandr Kolov (LPI RAS\, NRNU MEPhI)\nDecays of $B _c^+$ meson involving a charmonium resonance are studied. Both Run-2 and R un-3 pp collision data are used to improve the sensitivity and accuracy of the measurements.\n\nhttps://indico.particle.mephi.ru/event/436/contribut ions/4387/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4387/ END:VEVENT BEGIN:VEVENT SUMMARY:Spectroscopy of beauty strange baryons at CMS DTSTART;VALUE=DATE-TIME:20241024T153500Z DTEND;VALUE=DATE-TIME:20241024T155000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4386@cern.ch DESCRIPTION:Speakers: Kirill Ivanov (Moscow Institute of Physics and Techn ology)\nLatest CMS results on spectroscopy of beauty strange baryons are r eported\, including new decay modes and studies of excited states. The ana lyses use pp collision data at 13 TeV.\n\nhttps://indico.particle.mephi.ru /event/436/contributions/4386/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4386/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the phase difference between strong and electromagn etic amplitudes via the lineshape scan of the J/psi resonance DTSTART;VALUE=DATE-TIME:20241024T142000Z DTEND;VALUE=DATE-TIME:20241024T143500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4385@cern.ch DESCRIPTION:Speakers: Igor Boyko (JINR)\nThe J/psi charmonium state can de cay\nto the same final states through either\nstrong or electromagnetic me chanism.\nTheoretical models predict rather different\nvalues of the relat ive phase difference\nbetween the two amplitudes. The BESIII\nexperiment h as performed an energy scan\nof the process e+e- -> J/psi -> phi eta\nin t he vicinity of the J/psi peak.\nIn this talk we report the determination\n of the phase difference between strong\nand electromagnetic amplitudes fro m the\nlineshape scan of the J/psi resonance.\n\nhttps://indico.particle.m ephi.ru/event/436/contributions/4385/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4385/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the inclusive branching fractions for Bs decays int o D mesons DTSTART;VALUE=DATE-TIME:20241024T150500Z DTEND;VALUE=DATE-TIME:20241024T152000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4388@cern.ch DESCRIPTION:Speakers: Murad Yasaveev (HSE)\nWe report measurement of the $ B_s^0$ absolute branching fractions $Br(B_s^0 \\to D_s^{\\pm} X)$\, $Br(B_ s^0 \\to D^0/\\bar{D}^0 X)$\, and $Br(B_s^0 \\to D^{\\pm} X)$. The results are based on a sample of 121.4 fb$^{-1}$ collected at the $\\Upsilon(1086 0)$ resonance by the Belle detector at the KEKB asymmetric-energy $e^+ e^- $ collider. We perform full reconstruction of one $B_s^0$ meson in $e^+e^- \\to \\Upsilon(10860) \\to B_s^{*} \\bar{B}_s^{*}$ events and measure yie lds of $D_s^+$\, $D^0$\, and $D^+$ mesons in the rest of the event. We obt ain $Br(B_s^0 \\to D_s^{\\pm} X)$ = (68.6 $\\pm$ 7.2 $\\pm$ 4.0)%\, $Br(B_ s^0 \\to D^0/\\bar{D}^0 X)$ = (21.5 $\\pm$ 6.1 $\\pm$ 1.8)%\, and $Br(B_s^ 0 \\to D^{\\pm} X)$ = (12.6 $\\pm$ 4.6 $\\pm$ 1.3)%\, where the first unce rtainty is statistical and the second is systematic. The results for $Br(B _s^0 \\to D_s^{\\pm} X)$ and $Br(B_s^0 \\to D^0/\\bar{D}^0 X)$ are compati ble with previous Belle measurements\, the $Br(B_s^0 \\to D^{\\pm} X)$ is measured for the first time.\n\nhttps://indico.particle.mephi.ru/event/436 /contributions/4388/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4388/ END:VEVENT BEGIN:VEVENT SUMMARY:Hadronic decays of excited bottomonium states at Belle and Belle I I DTSTART;VALUE=DATE-TIME:20241024T152000Z DTEND;VALUE=DATE-TIME:20241024T153500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4384@cern.ch DESCRIPTION:Speakers: Evgeniy Kovalenko (BINP)\nThe Belle and Belle II exp eriments have collected a unique sample of data at centre-of-mass energies above the $\\Upsilon(\\text{4S})$ resonance. We present several results related to hadronic transitions between bottomonium states such as $\\Upsi lon(\\text{5S}) \\to \\Upsilon(\\text{1S\,2S})\\eta$\, $\\Upsilon(\\text{5 S\, 10753}) \\to \\Upsilon(\\text{1S\,2S})\\pi^+\\pi^-$\, $\\Upsilon(\\tex t{5S}) \\to h_b(\\text{1P\,2P})\\pi^+\\pi^-$\, and $h_b(\\text{1P\,2P}) \\ to \\Upsilon(1S)\\eta$.\n\nhttps://indico.particle.mephi.ru/event/436/cont ributions/4384/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4384/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of the hadronic cross sections via ISR at Belle II DTSTART;VALUE=DATE-TIME:20241024T145000Z DTEND;VALUE=DATE-TIME:20241024T150500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4383@cern.ch DESCRIPTION:Speakers: Boris Shwartz (Budker Institute of Nuclear Physics)\ nA study of the hadrons production in $e^+e^-$ annihilation at low energie s provides important information about interactions of light quarks and sp ectroscopy of their bound states. \nPrecise measurements of the total hadr onic cross section\, characterized by the ratio R\, is needed for the calc ulation of the contribution of the hadronic vacuum polarization to the muo n anomalous magnetic moment. It should be noted that at present the accura cy of the theoretical calculations of the muon (g-2) via the Standard Mode l is dominated by the precision of the hadronic contribution while an ambi guity in the theoretical results exists due to considerable difference bet ween experimental data from different experiments. This reports describes status and prospects of the hadronic cross sections measurements at Belle II experiment via ISR approach. A measurement of the $e^+e^− \\to \\pi^+ \\pi^−\\pi^0$ cross section in the energy range from 0.62 GeV to 3.5 GeV based on 191 fb$^{−1}$ of integrated luminosity is considered in detail s.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4383/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4383/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the energy dependence of the $e^+e^− \\rightarrow B\\bar{B}\, B\\bar{B}^*\,$ and $B^*\\bar{B}^*$ cross sections at Belle I I DTSTART;VALUE=DATE-TIME:20241024T143500Z DTEND;VALUE=DATE-TIME:20241024T145000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4382@cern.ch DESCRIPTION:Speakers: Sergey Privalov ()\nWe report measurements of the $e ^+e^− \\rightarrow B\\bar{B}\, B\\bar{B}^*\,$ and $B^*\\bar{B}^*$ cross sections at four energies\, 10653\, 10701\, 10746 and 10805 MeV\, using da ta collected by the Belle II experiment. We reconstruct one $B$ meson in a large number of hadronic final states and use its momentum to identify th e production process. In the first 2 − 5 MeV above $B\\bar{B}^*$ thresho ld\, the $e^+e^− \\rightarrow B^*\\bar{B}^*$ cross section increases rap idly. This may indicate the presence of a pole close to the threshold.\n\n https://indico.particle.mephi.ru/event/436/contributions/4382/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4382/ END:VEVENT BEGIN:VEVENT SUMMARY:Charmonia production in e+e- annihilation at center-of-mass energi es above 3.81 GeV DTSTART;VALUE=DATE-TIME:20241024T140000Z DTEND;VALUE=DATE-TIME:20241024T142000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4381@cern.ch DESCRIPTION:Speakers: Olga Bakina (Joint Institute for Nuclear Research)\n We present measurements of charmonia production cross sections in e+e- ann ihilation at center-of-mass energies from 3.81 GeV to 4.95 GeV at BESIII. The number of observed vector states in this energy region exceeds that of the predicted vector charmonium states. These features suggest that some of these supernumerary vector states are candidates of an exotic nature. T o clarify the nature of these states and to distinguish between the differ ent theoretical models\, precise measurements of the production cross sect ion and of the resonance parameters are essential.\n\nhttps://indico.parti cle.mephi.ru/event/436/contributions/4381/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4381/ END:VEVENT BEGIN:VEVENT SUMMARY:Open and hidden strangeness in central A+A collisions from SPS to LHC: ratios of transverse energy density at midrapidity for the identified hadrons with different strangeness content DTSTART;VALUE=DATE-TIME:20241024T081500Z DTEND;VALUE=DATE-TIME:20241024T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4373@cern.ch DESCRIPTION:Speakers: Olga Shaposhnikova ()\nWe continue studies of the ef fects previously observed in very central (0-5% class) relativistic heavy -ion collisions where we found that the ratios of the Bjorken energy densi ty fractions\, relevant to the identified hadrons\, practically are not de pending on the collision energy in all cases of open and hidden strangenes s [1]. In our new work\, we include into the analysis the additional HEP data on the yields of particles containing one\, two or three strange quar ks. This includes Λ barion and Kos meson \, Ξ and Ω hyperons yields me asured in Au-Au and Pb-Pb collisions at √sNN = 39 GeV\, 200GeV and 2.76 TeV. The particle HEP data spectra were approximated in each case by the Levy functions\, and in such way the relevant mean p_t was obtained and used in the calculations of the mean transverse energy density at midra pidity for the particle (i) of interest. The Blast Wave approximation for the spectra shape was also used to compare and to estimate the systemati c error of mean p_t and of the relevant mean (dEt/dy)i . Finally\, the ratios were obtained of mean (dEt/dy) ϕ /(dEt/dy)i -- for ϕ-mesons an d other particles\, registered at midrapidity in central A+A collisions. T he results are discussed. \nThe authors acknowledge Saint-Petersburg State University for a research project 95413904\nReferences: \n[1] O. Shaposhn ikova\, A. Marova and G. Feofilov\, Open and Hidden Strangeness with Kaons and ϕ-Mesons in Bjorken Energy Density Approach for Central Collisions f rom SPS to LHC\, Physics of Particles and Nuclei\, 2024\, Vol. 55\, No. 4\ , pp. 1134–1139. © Pleiades Publishing\, Ltd.\, 2024.\n\nhttps://indico .particle.mephi.ru/event/436/contributions/4373/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4373/ END:VEVENT BEGIN:VEVENT SUMMARY:Feasibility studies of open charm production in future ALICE-3 exp eriment at LHC-HL DTSTART;VALUE=DATE-TIME:20241024T080000Z DTEND;VALUE=DATE-TIME:20241024T081500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4378@cern.ch DESCRIPTION:Speakers: Mikhail Malaev (NRC Kurchatov Institute PNPI)\nStage 3 of ALICE experiment considers construction of fully new detector based on the novel silicon technologies. New apparatus will widen area of studie s of hot and dense QCD matter produced in relativistic heavy-ion collision s for ALICE collaboration. Besides this it will highly improve precision o f already obtained results also giving opportunity for differential studie s. And one of the goals of future ALICE-3 experiment is precise differenti al study of open charm production in wide range of transverse momentum. \n In this contribution\, we present results of feasibility studies for the r econstruction of D-mesons excited states in the decay channels with neutra l photons or mesons detected in the large acceptance electromagnetic calor imeter of future ALICE-3 experiment at LHC-HL. Effect of merged clusters i n electromagnetic calorimeter is discussed and estimations of reconstructe d efficiency\, signal to background ratio and required for precise measure ments statistics of heavy ions collisions are presented.\n\nhttps://indico .particle.mephi.ru/event/436/contributions/4378/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4378/ END:VEVENT BEGIN:VEVENT SUMMARY:The upper limit on the $K^+\\rightarrow\\pi^0\\pi^0\\pi^0e^+\\nu$ decay DTSTART;VALUE=DATE-TIME:20241024T074500Z DTEND;VALUE=DATE-TIME:20241024T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4380@cern.ch DESCRIPTION:Speakers: Alexei Kulik (Institute for Nuclear Research)\nA hig h statistics search for the $K^+\\rightarrow\\pi^0\\pi^0\\pi^0e^+\\nu$ dec ay is performed by the OKA collaboration. No signal\nis observed. Two othe r decays are also studied: $K^+\\rightarrow\\pi^0e^+\\nu$ for normalizatio n and $K^+\\rightarrow\\pi^0\\pi^0e^+\\nu$ for the\ncross-check. The upper limit set is $BR(K^+\\rightarrow\\pi^0\\pi^0\\pi^0e^+\\nu)\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4380/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4380/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of lepton flavour universality in Bc+ meson decays DTSTART;VALUE=DATE-TIME:20241024T071500Z DTEND;VALUE=DATE-TIME:20241024T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4377@cern.ch DESCRIPTION:Speakers: Aleksandr Sedelnikov ()\nCMS results on R(Jpsi) lept on flavor universality observable are reported using two channels of recon struction of the tau lepton. The measurements use 13 TeV pp collision data from the LHC Run 2.\n\nhttps://indico.particle.mephi.ru/event/436/contrib utions/4377/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4377/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for new physics in rare decays of heavy flavors at CMS DTSTART;VALUE=DATE-TIME:20241024T064500Z DTEND;VALUE=DATE-TIME:20241024T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4376@cern.ch DESCRIPTION:Speakers: Sergey Polikarpov (NRNU MEPhI and LPI RAS)\nIndirect searches for new physics are possible through studies of Flavor-changing- neutral-current (FCNC) transitions in heavy flavor decays. Several recent results based on 13 TeV (Run-2) and 13.6 TeV (Run-3) pp collisions at the CMS experiment are reported.\n\nhttps://indico.particle.mephi.ru/event/436 /contributions/4376/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4376/ END:VEVENT BEGIN:VEVENT SUMMARY:Resonant Charmonium Pair Production: A Comprehensive Review of The oretical and Experimental Advances DTSTART;VALUE=DATE-TIME:20241024T073000Z DTEND;VALUE=DATE-TIME:20241024T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4375@cern.ch DESCRIPTION:Speakers: Alisa Didenko (Joint Institute for Nuclear Research (JINR))\nThe narrow resonant-like structures were discovered by three main LHC collaborations (LHCb\, ATLAS\, CMS) in the di-Jpsi\, Jpsi-Psi2S invar iant mass spectra suggesting existence of the fully-heavy tetraquarks with a ccc(bar)c(bar) configuration. These new exotic resonances require detai led theoretical and experimental investigation. In this review\, the lates t experimental results and several theoretical approaches towards physics of new states are presented.\n\nhttps://indico.particle.mephi.ru/event/436 /contributions/4375/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4375/ END:VEVENT BEGIN:VEVENT SUMMARY:CP violation studies at CMS DTSTART;VALUE=DATE-TIME:20241024T070000Z DTEND;VALUE=DATE-TIME:20241024T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4374@cern.ch DESCRIPTION:Speakers: Alexander Tulupov ()\nCP violation plays a crucial r ole in our understanding of the universe’s matter-dominated nature. With out CP violation\, the Standard Model of particle physics cannot fully exp lain why the observable universe consists predominantly of matter\, as opp osed to an equal mix of matter and antimatter. The search for new sources of CP violation is essential for understanding the dynamics that could hav e led to this imbalance\, offering potential insights into physics beyond the Standard Model. This talk discusses the latest results from the CMS ex periment at $\\sqrt{s}=13\\ \\text{TeV}$\, focusing on CP violation in hea vy flavor physics.\n\nhttps://indico.particle.mephi.ru/event/436/contribut ions/4374/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4374/ END:VEVENT BEGIN:VEVENT SUMMARY:Feasibility studies of charmonia measurements at the ALICE experim ent at LHC DTSTART;VALUE=DATE-TIME:20241024T063000Z DTEND;VALUE=DATE-TIME:20241024T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4379@cern.ch DESCRIPTION:Speakers: Yeghishe Hambardzumyan (Moscow Institute of Physics and Technology)\nThe ALICE collaboration is committed towards strongly int eracting matter studies in proton-proton and heavy ion collisions at LHC\, one of the characteristic observables of which are systematic measurement s of quarkonia production with the future experiment of ALICE 3. Fast sim ulations for ALICE 3 showed that studies of charmonia states 1S ($J/\\psi \\to e^+e^-$) and 1P ($\\chi_{cJ} \\to J/\\psi \\gamma$ using a high-resol ution electromagnetic calorimeter are attainable. Charmonia reconstruction via $e^+e^-$ decay mode relies on electron identification using a trackin g system and an electromagnetic calorimeter. In the current report we demo nstrate performance of electron identification procedure on data of the AL ICE experiment collected during LHC Run 3 with pp collisions at $\\sqrt{s} =13.6$ TeV.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/43 79/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4379/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Dibaryons with small energy excitation on SPD detector in NICA collider - accuracies and counting rates DTSTART;VALUE=DATE-TIME:20241023T143500Z DTEND;VALUE=DATE-TIME:20241023T145000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4372@cern.ch DESCRIPTION:Speakers: Vladimir Kurbatov (JINR)\nIt is proposed to do a sea rch for the light dibaryons in the experiment with the future SPD detector on the NICA collider at JINR . It is proposed that the reaction d + d → d + X should be measured at the collider momentum 2.6 GeV /c with the reg istration of the deuteron and proton in a final state.The achievable accur acies are estimated in different configurations of the detector with allow ance to its gradual modifications up to completion. The counting rate of t he reaction is estimated at ≈ 2 s−1 and the accuracy of mass measureme nt in the first version of the detector at ≈ 4.7 MeV\n\nhttps://indico.p article.mephi.ru/event/436/contributions/4372/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4372/ END:VEVENT BEGIN:VEVENT SUMMARY:GAN for prediction of direct photons in longitudinally polarized p roton-proton collisions at energy √s = 27 GeV DTSTART;VALUE=DATE-TIME:20241023T150500Z DTEND;VALUE=DATE-TIME:20241023T152000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4369@cern.ch DESCRIPTION:Speakers: Andrey Lobanov (SPbPU)\nA study of direct photon pro duction in longitudinally polarized proton-proton collisions presents a va luable opportunity to investigate the contribution of gluons to the total proton spin. This contribution is described in terms of a gluon helical di stribution function\, $\\Delta g(x)$. An investigation of this function fo rms part of the experimental program scheduled for the SPD experiment. The extraction of $\\Delta g(x)$ is achieved through the measurement of doubl e longitudinal spin asymmetry (DLSA) in direct photon production.\n\nThe s tudy of direct photons presents certain challenges. Due to their relative rarity\, it is difficult to distinguish direct photons from those produced by other sources. Consequently\, it is challenging to obtain a substantia l sample size. One potential solution is the application of generative mac hine learning models\, such as generative adversarial networks (GANs). The model can be trained to predict the outcome of longitudinally polarized p roton-proton collisions without modeling the entire experiment in detail\, but only the relevant process.\n\nAs the SPD experiment is still under co nstruction\, a PYTHIA8 Monte Carlo generator with polarized NNPDFpol11 was selected for testing the potential of using GAN to predict the production of direct photons in longitudinally polarized proton-proton collisions.\n \nThe present report is devoted to an investigation of the capabilities of GAN in predicting the outcomes of direct photon production in both polari zed and unpolarized proton-proton collisions at a center-of-mass energy of $\\sqrt{s} = 27$ GeV.\n\nWe acknowledge support from Russian Ministry of Education and Science. State assignment for fundamental research (code FSE G-2024-0033)\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 369/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4369/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of direct photons production in d+d collisions at $\\sq rt{s_{NN}}=13.5$ GeV and $\\sqrt{s_{NN}}=27$ GeV DTSTART;VALUE=DATE-TIME:20241023T145000Z DTEND;VALUE=DATE-TIME:20241023T150500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4368@cern.ch DESCRIPTION:Speakers: Dmitry Shapaev (Peter the Great St.Petersburg Polyte chnic University (SPbPU))\nDirect photons produced in quark-gluon and quar k-antiquark interactions are planned to be studied in detail in the upcomi ng SPD experiment at the NICA collider. Direct photons serve as important probes for understanding the dynamics of interactions in high-energy nucle ar collisions.\n\nAn important aspect for understanding the production of direct photons are parton distribution functions (PDFs)\, which determine the probability of detecting quarks and gluons with given characteristics inside nucleons. PDFs can differ significantly for free and internuclear n ucleons. The differences between these functions can be investigated throu gh the invariant spectra and nuclear modification factors of direct photon s in deuteron-deuteron collisions.\n\nIn this paper\, we present calculati ons of the invariant spectra and nuclear modification factors of direct ph otons as a function of transverse momentum in the rapidity region $|y|\n\n https://indico.particle.mephi.ru/event/436/contributions/4368/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4368/ END:VEVENT BEGIN:VEVENT SUMMARY:K*-(892) meson production in 26.5 GeV/c K-minus-meson-N interactio ns at U-70 accelerator complex DTSTART;VALUE=DATE-TIME:20241023T155000Z DTEND;VALUE=DATE-TIME:20241023T160500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4367@cern.ch DESCRIPTION:Speakers: Nikita Klaugin ()\nWe report measurements of A-depen dence K$^*$-(892) mesons' production in interactions of 26.5 GeV/c K-minus -meson beam and nuclei (C\,Al\,Cu\,W) at SPASCHARM facility at U=70 accele rator complex (NRC "Kurchatov institute" - IHEP\, Protvino.\nA-dependence of K$^*$-(892) mesons is compared with our results on A-dependence of K0s- mesons and with other experimental measurements.\n\nhttps://indico.particl e.mephi.ru/event/436/contributions/4367/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4367/ END:VEVENT BEGIN:VEVENT SUMMARY:Polarization measurement of $\\Lambda$- and $\\bar{\\Lambda}$-hype rons formed by the interaction of $K^{-}$- and $\\pi^{-}$-mesons with nucl ei at the SPASCHARM facility at the U-70 accelerator DTSTART;VALUE=DATE-TIME:20241023T153500Z DTEND;VALUE=DATE-TIME:20241023T155000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4366@cern.ch DESCRIPTION:Speakers: Vyacheslav Moiseev (NRC «Kurchatov Institute» - IH EP)\nThe first results on the polarization of inclusively produced $\\Lamb da$-hyperons in the $K^{-}$- and $\\pi^{-}$-beams and $\\bar{\\Lambda}$-hy perons in the $\\pi^{-}$-beam with a momentum of 26.5 GeV/$c$ were obtaine d at the SPASCHARM facility at the U-70 accelerator complex in Protvino. F or the data on the $K^{-}$-meson beam\, a noticeable positive polarization is observed in the region of large values of the Feynman variable $x_F$ a nd the transverse momentum $p_T$\, which was measured for the first time o n nuclei. The polarization of $\\Lambda$- and $\\bar{\\Lambda}$-hyperons i n the $\\pi^{-}$-beam does not exceed several percent in most of the studi ed kinematic region\, with the exception of the region $p_T>1\\ \\text{GeV }/c$\, where the $\\Lambda$ polarization is $23\\pm 9$ %.\n\nhttps://indic o.particle.mephi.ru/event/436/contributions/4366/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4366/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the ANN spin correlation parameter in elastic pp an d p ̅p scattering reactions in the SPASCHARM experiment at U-70. DTSTART;VALUE=DATE-TIME:20241023T152000Z DTEND;VALUE=DATE-TIME:20241023T153500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4365@cern.ch DESCRIPTION:Speakers: Alexey Bogdanov (MEPhI)\nThe possibility of measurin g spin correlation parameter in elastic proton-proton and antiproton-proto n scattering in the SPASCHARM experiment at U-70 accelerator complex at Pr otvino is discussed. The measurements will be carried out using polarized beams and a polarized target of the experiment. A realistic simulation of the experiment was carried out and an evaluation of the accuracy of ANN me asurements of elastic pp and p p scattering at an energy of 16 GeV and the time required to measure this observable in both reactions was made.\n\nh ttps://indico.particle.mephi.ru/event/436/contributions/4365/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4365/ END:VEVENT BEGIN:VEVENT SUMMARY:Local Polarimetry with Beam-Beam Counters at the SPD Experiment DTSTART;VALUE=DATE-TIME:20241023T142000Z DTEND;VALUE=DATE-TIME:20241023T143500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4371@cern.ch DESCRIPTION:Speakers: Arkadiy Terekhin (JINR)\nThe Beam-Beam Counters (BBC ) are components of the Spin Physics Detector at the NICA collider. They a re designed to perform local polarimetry of the colliding polarized proton and deuteron beams and luminosity control in the beam interaction region. Here\, the MC simulation of the BBC operation for proton-proton collision s is presented. The simulations are performed using the SpdRoot framework and the center-of-mass energy of 27 GeV. The results presented include th e estimation of the magnetic field influence on the inclusive charged part icle production asymmetries and the BBC. The selection of the pp-elastic s cattering events in the BBC is also discussed.\n\nhttps://indico.particle. mephi.ru/event/436/contributions/4371/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4371/ END:VEVENT BEGIN:VEVENT SUMMARY:Anisotropic flow measurements of Λ hyperons: performance study fo r MPD and BM@N experiments at NICA energies. DTSTART;VALUE=DATE-TIME:20241025T101000Z DTEND;VALUE=DATE-TIME:20241025T102500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4352@cern.ch DESCRIPTION:Speakers: Valerii Troshin (JINR\, MEPhI)\nThe study of nuclear matter properties in the region of maximum baryonic density is one of the main goals of beam energy scanning programs in relativistic heavy ion col lisions with energies $\\sqrt{s}_{NN}=2.4-11$ GeV. Among the important ob servables in this study is the momentum anisotropy with respect to the rea ction plane\, characterized by anisotropic transverse flow coefficients.\n \nIn this work\, we discuss the first results of the BM@N Xe+CsI Run8 anal ysis and the efficacy of the invariant mass fitting method for measuring the anisotropic flow of Lambda hyperons with the MPD experiment at NICA.\n \nhttps://indico.particle.mephi.ru/event/436/contributions/4352/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4352/ END:VEVENT BEGIN:VEVENT SUMMARY:Modeling of charge particle correlations in nucleus-nucleus intera ctions at NICA and RHIC energies DTSTART;VALUE=DATE-TIME:20241025T095500Z DTEND;VALUE=DATE-TIME:20241025T101000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4351@cern.ch DESCRIPTION:Speakers: Aleksei Chernyshov (SINP MSU)\nA model analysis of c harge particle correlations in relativistic heavy-ion collisions was perfo rmed at energies that are planned to be available at NICA. The charge bala nce function (CBF) was chosen as a measure of charge correlations. The CBF represents conditional probability density of a charged particle to be ob served at certain relative to its antiparticle rapidity and azimuthal angl e given the antiparticle was observed elsewhere. The CBF widths are sensit ive to charge separation duration in the system. It was shown that measure d by STAR experiment at RHIC dependencies of CBF rapidity widths on centra lity of Au+Au collisions at center-of-mass energies 7.7 and 11.5 GeV per n ucleon pair can be reproduced with HYDJET++ model. In order to achieve ade quate description of the experimental results an event-by-event charge con servation mechanism was introduced to the Monte-Carlo model HYDJET++\, and finite values of isospin\, strangeness and baryon chemical potentials wer e taken into account.\n\nhttps://indico.particle.mephi.ru/event/436/contri butions/4351/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4351/ END:VEVENT BEGIN:VEVENT SUMMARY:Modeling of alignment phenomenon in relativistic heavy ion collisi ons DTSTART;VALUE=DATE-TIME:20241025T094000Z DTEND;VALUE=DATE-TIME:20241025T095500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4353@cern.ch DESCRIPTION:Speakers: Aleksei Nikolskii (JINR\, MSU)\nThe kinematic descri ption of the azimuthal correlation of photon and hadron families is discus sed. This correlation\, also known as the alignment\, was first observed b y the Pamir collaboration in emulsion experiments with cosmic rays. At the qualitative level the alignment demonstrates the deviation of points from a straight line on the plane of the emulsion film. In our approach the hy pothesis of the relation between the alignment of spots and the selection procedure of the highest-energy particles itself together with the transve rse momentum conservation is tested in the framework of the HYDJET++ model . Event-by-event the transverse momentum conversation has been taken into account in the form of missing transverse momentum. It is shown that the h igh degree of alignment can appear at the reasonable values of transverse momentum disbalance of selected most energetic particles. \n\n1) Pamir Col laboration\, A. Borisov et al.\, in Proceedings of 4th International Sympo sium on Very High Energy Cosmic Ray Interactions\, Beijing\, ed. by D. Li nkai (1986)\, p. 4.\n\n2) I.P. Lokhtin\, A.V. Nikolskii\, \, A.M. Snigire v\, arXiv: 2406.06114. \n\n3) I.P. Lokhtin\, A.V. Nikolskii\, \, A.M. Sn igirev\, Eur. Phys. J. C 83\, 324 (2023)\, arXiv: 2301.07975. \n\n4) R.A. Mukhamedshin\, Eur. Phys. J. C 82\, 155 (2022)\, arXiv: 2207.13558. \n\n5 ) I. P. Lokhtin et al.\, Comput. Phys. Commun. 180\, 779 (2009).\n\nhttps: //indico.particle.mephi.ru/event/436/contributions/4353/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4353/ END:VEVENT BEGIN:VEVENT SUMMARY:Estimation of the isotopic spin influence on femtoscopic correlati ons of identical pions in Au+Au collisions in the UrQMD model DTSTART;VALUE=DATE-TIME:20241025T083000Z DTEND;VALUE=DATE-TIME:20241025T084500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4354@cern.ch DESCRIPTION:Speakers: Anna Kraeva (National Research Nuclear University ME PhI)\nOne of the main aims of relativistic nuclear physics is the search f or signs of\nformation\, quantitative evaluation and description of nuclea r matter properties\nunder extreme conditions. The characteristic of the s ystem created as a result\nof heavy-ion collisions can be explored via spa tial and temporal parameters\nobtained using the method of correlation fem toscopy. At low energies\, the size\nof the particle emission region is af fected by the isotopic spin. Studies of isospin effects on the reaction dy namics can provide a clearer estimate of the temporal characteristics of t he particle emission processes.\n\nIn this report\, the results on the mea surements of femtoscopic correla-\ntions will be presented for identical p ions produced in Au+Au collisions at\n$\\sqrt{s}_{NN} = 3$ GeV using the U rQMD (Ultrarelativistic Quantum Molecular\nDynamics) model. The influence of the initial system isospin on the femto-\nscopic parameters is demonstr ated and the implementation for experiments is\ndiscussed.\n\nhttps://indi co.particle.mephi.ru/event/436/contributions/4354/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4354/ END:VEVENT BEGIN:VEVENT SUMMARY:Global polarization of Xi hyperons in Au+Au collisions in the STAR experimant DTSTART;VALUE=DATE-TIME:20241025T090500Z DTEND;VALUE=DATE-TIME:20241025T092500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4355@cern.ch DESCRIPTION:Speakers: Egor Alpatov (NRNU MEPhI)\nIn non-central heavy-ion collisions emitted particles' spin can be polarized along the initial glob al angular \nmomentum due to spin-orbit coupling. Global polarization of h yperons is measured utilizing parity \nviolating weak decay of hyperons an d is used to probe the vortical properties of the \nsystem. \nThe STAR exp eriment at RHIC measured the global polarization of $\\Lambda$\nhyperons i n Au+Au collisions at $\\sqrt{s_{NN}}$ = 3-200 GeV\, and similar measureme nts \nwere conducted at the LHC for Pb+Pb collisions at $\\sqrt{s_{NN}}$ = 2.76 and 5.02 TeV. Measurement of multistrange hyperons have been only li mited to top RHIC energy.\n\nIn this talk\, we will report results of $\\X i$ global polarization for Au+Au collisions at $\\sqrt{s_{NN}}$ = 14.6\, 1 9.6 and $27\\ \\text{GeV}$. While $\\Lambda$ global polarization was measu red in wide energy range the energy dependence of \nmultistrange hyperon g lobal polarization can provide new experimental input for understanding vo rtical properties of matter in heavy-ion collisions.\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4355/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4355/ END:VEVENT BEGIN:VEVENT SUMMARY:Magnetic and vortical impacts on the effective QCD phase diagram DTSTART;VALUE=DATE-TIME:20241025T084500Z DTEND;VALUE=DATE-TIME:20241025T090500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4357@cern.ch DESCRIPTION:Speakers: Luis Hernandez (Universidad Autonoma Metropolitana)\ nIn this talk\, we present a comprehensive analysis of chiral symmetry res toration using the Linear Sigma model coupled with quarks to illustrate th e effective QCD phase diagrams. Specifically\, we explore the temperature- baryon chemical potential plane\, incorporating magnetic field effects and investigating the impact of high vorticity on the QCD phase transition. O ur study aims to pinpoint the Critical End Point within these phase diagra ms. Additionally\, we discuss the potential implications of our findings f or relativistic heavy-ion collisions\, offering insights into the critical behavior and phase structure of QCD under extreme conditions.\n\nhttps:// indico.particle.mephi.ru/event/436/contributions/4357/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4357/ END:VEVENT BEGIN:VEVENT SUMMARY:The first results for directed flow of protons in Xe+Cs collisions at Ekin=3.8A GeV in the BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T074500Z DTEND;VALUE=DATE-TIME:20241025T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4350@cern.ch DESCRIPTION:Speakers: Mikhail Mamaev (NRNU MEPhI)\nHeavy ion collision at the energies of several A GeV is the only way to produce in laboratory hot and dense matter existing in massive astrophysical objects such as neutro n stars\, binary stellar collisions etc. In 2023 Baryonic Matter at Nuclot ron (BM@N) experiment collected the first physical data for Xe+CsI collisi ons at $E_{kin} = 3.8A$ GeV. Studying the observables from heavy ion colli sions can shed light on the properties of the matter created and establish its Equation of State (EOS). Collective motion of the produced in the col lision particles is one of such observables sensitive to the EOS of the pr oduced matter. We present the first results for directed flow of protons w ith respect to the spectator symmetry plane and compare the obtained resu lts with existing word data.\n\nhttps://indico.particle.mephi.ru/event/436 /contributions/4350/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4350/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of proton and light nuclei production in Ar-nucleus collisio ns in the BM@N experiment at NICA DTSTART;VALUE=DATE-TIME:20241025T073000Z DTEND;VALUE=DATE-TIME:20241025T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4349@cern.ch DESCRIPTION:Speakers: Vadim Kolesnikov (JINR)\nThe BM@N (Baryonic Matter a t Nuclotron) is a fixed-target detector for relativistic nuclear collision s at the NICA accelerator complex. The focus of the BM@N physics program i s the study of the production of hadrons and light (hyper)nuclei in nucleu s-nucleus interactions with energies up to 4A GeV. In this talk we present recent results on the production of protons\, deuterons\, and tritons in centrality selected argon-nucleus collisions at 3.2A GeV. Rapidity and tra nsverse momentum distributions of p\, d\, t over a large phase space regio n will be shown. System size dependence of particle yields and ratios in A r+A (A = C\, Al\, Cu\, Sn\, Pb) collisions will be discussed and tested ag ainst model predictions.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4349/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4349/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance for anisotropic flow measurement of inclusive photons and neutral pions in Bi+Bi collisions at 9.2 GeV with the MPD experiment DTSTART;VALUE=DATE-TIME:20241025T071500Z DTEND;VALUE=DATE-TIME:20241025T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4348@cern.ch DESCRIPTION:Speakers: Oleg Golosov (NRC "Kurchatov Institute"\, NRNU MEPhI )\nDirect photons produced in electromagnetic processes in heavy ion colli sions do not interact with other particles in the collision zone. Analysis of direct photon anisotropic flow could provide additional information on the conditions at the production time and on the development of collectiv e flow. Direct photon flow is extracted based on flow and spectra of inclu sive photons and of neutral pions\, the main source of decay photons. More over\, results for neutral pion spectra and flow are interesting themselve s as they allow to constrain properties of hot and dense nuclear matter th anks to the robust particle identification and wide coverage in transverse momentum.\n\nWe present the performance for measurement of anisotropic fl ow for inclusive photon and neutral pion with the MPD experiment.\n\nhttps ://indico.particle.mephi.ru/event/436/contributions/4348/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4348/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of φ(1020)\, ρ(770) and K*(892) resonance production in Bi +Bi collisions at √sNN = 9.2 GeV in the MPD detector at NICA collider DTSTART;VALUE=DATE-TIME:20241025T070000Z DTEND;VALUE=DATE-TIME:20241025T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4347@cern.ch DESCRIPTION:Speakers: Dmitry Ivanishchev (SPbPU\, NRC «Kurchatov Institut e» - PNPI)\nMeasurement of properties of short-lived resonances produced in heavy-ion collisions plays an important role in study of the hot and de nse medium produced in such collisions. Due to short lifetimes of resonanc es a significant part of them decays in the fireball. This makes resonance s a unique tool for studying the evolution of the colliding system and rel ated phenomena: excessive yield of baryons at intermediate momentum\, flav or dependence of the parton energy loss\, enhanced strangeness production\ , rescattering and regeneration in the hadron gas and others.\nThe study o f resonance production in heavy ion collisions is an important part of the physical program of the MPD experiment at NICA. We present results of fea sibility studies for measurement of φ(1020)\, ρ(770) and K*(892) mesons production in Bi + Bi collisions at √sNN = 9.2 GeV using the MPD detecto r at NICA collider. Results are obtained using full-scale Monte Carlo simu lations of heavy-ion collisions and the experimental setup.\nWe acknowledg e support from the Russian Ministry of Education and Science\, state assig nment for fundamental research (code FSEG-2024-0033).\n\nhttps://indico.pa rticle.mephi.ru/event/436/contributions/4347/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4347/ END:VEVENT BEGIN:VEVENT SUMMARY:K*(892) meson production in Au+Au at $\\sqrt{s_{NN}}$ = 200 GeV DTSTART;VALUE=DATE-TIME:20241025T064500Z DTEND;VALUE=DATE-TIME:20241025T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4346@cern.ch DESCRIPTION:Speakers: Sergei Antsupov (Peter the Great St.Petersburg Polyt echnic University\, Saint-Petersburg\, Russia)\nThe research on K*(892) me son production can lead to a new discoveries in properties of exotic state of matter called quark-gluon plasma (QGP) in which quarks and gluons are deconfined. Strangeness enhancement is one of the main observables of QGP which can be measured by studying the production of particles containing s trange quark(s). K*(892) meson is one of such particles. Production of K*( 892) can be described by it’s invariant $p_T$ spectra. Comparison of pro duction of K*(892) in heavy and in p+p collision systems can be shown by n uclear modification factors. Since QGP isn’t formed in p+p collisions at $\\sqrt{s_{NN}} = 200$ GeV strangeness enhancement can be observed throug h the nuclear modification factors.\n\nCurrent report is dedicated to meas urements of K*(892) mesons invariant $p_T$ spectra and nuclear modificatio n factors as functions of transverse momentum and centrality in Au+Au coll ision system at $\\sqrt{s_{NN}}= 200$ GeV.\nThe report can be considered a s a prototype of the research planned in the MPD experiment of the megapro ject NICA.\n\nWe acknowledge support from Russian Ministry of Education an d Science. State assignment for fundamental research (code FSEG-2024-0033) .\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4346/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4346/ END:VEVENT BEGIN:VEVENT SUMMARY:Elliptic flow of $\\pi^{0}$ in $^3$He+Au and U+U collisions DTSTART;VALUE=DATE-TIME:20241025T063000Z DTEND;VALUE=DATE-TIME:20241025T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4345@cern.ch DESCRIPTION:Speakers: Egor Bannikov (Peter the Great St.Petersburg Polytec hnic University (SPbPU))\nHadronic matter in heavy-ion collisions can reac h extreme energy densities and undergo a phase transition into quark-gluon plasma (QGP) consisting of asymptotically free partons. One of the main w ays to investigate QGP’s properties is to measure the azimuthal particle anisotropy in momentum space. This anisotropy can be characterized by the elliptic flow ($v_2$).\n\nThe elliptic flow for charged hadrons was measu red by PHENIX experiment at RHIC in small collision systems (p/d$/^3$He+Au ). In the most central collisions\, azimuthal anisotropy can be described by relativistic hydrodynamics\, as in heavy-ion collisions. However\, $v_2 $ of charged hadrons in more peripheral collisions cannot be interpreted o nly as flow\, but has significant nonflow contribution\, which also depend s on transverse momentum ($p_T$). Since the production of $\\pi^0$ mesons can be measured up to high values of $p_T$\, the measurement of the $v_2$ values for $\\pi^0$ in $^3$He+Au collisions is considered unique tool to s tudy the interplay between flow and nonflow effects in small systems.\n\nT he second part of this report is devoted to the measurement of $v_2$ value s for $\\pi^0$ mesons in U+U collision system – the largest system at RH IC. Since the $^{238}$U nucleus is highly deformed\, the study of collisio ns of uranium nuclei is especially interesting from the point of view of s tudying jet-quenching effect. In heavy-ion collisions nonzero values of $v _2$ at high $p_T$ can be associated with partonic energy loss. This makes the elliptic flow of $\\pi^0$ meson\, which is measurable up to high $p_T$ \, effective tool to study jet-quenching effect in U+U collisions.\n\nThus \, the current report is dedicated to the measurement of $\\pi^0$ mesons e lliptic flow in $^3$He+Au and U+U collisions at $\\sqrt{s_{NN}}$=200 GeV a nd $\\sqrt{s_{NN}}$=193 GeV\, respectively\, as a function of transverse m omentum and centrality.\n\nThe report can be considered as a prototype of the research planned in the MPD experiment of the megaproject NICA. \n\nWe acknowledge support from Russian Ministry of Education and Science. State assignment for fundamental research (code FSEG-2024-0033).\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4345/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4345/ END:VEVENT BEGIN:VEVENT SUMMARY:CALCULATING AZIMUTHAL FLOWS IN PB–PB AND XE–XE COLLISIONS WITH THE HYDJET++ MONTE CARLO GENERATOR AT THE LHC ENERGIES DTSTART;VALUE=DATE-TIME:20241025T060000Z DTEND;VALUE=DATE-TIME:20241025T061500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4344@cern.ch DESCRIPTION:Speakers: Danila Myagkov (MSU Faculty of Physics)\nNowadays\, research in the field of extreme states of matter is actively developing\, e.g. study of quark-gluon plasma. In this regard\, the comprehensive appl ication of various models that describe the phenomena occurring with matte r\, for example\, in relativistic collisions of heavy ions at the accelera tors\, is also developing. New methods of studying extreme conditions are being built\, and methods of working with them are being improved. One of these methods is the investigated study of nuclear collision using Monte C arlo generators.\n\nIn reality\, accelerators and detector complexes serve as a platform for such research. In our work\, we will focus mainly on th e results obtained by the CMS [1] collaboration working at the Large Hadro n Collider. Conducting research since 2010\, the CMS collaboration has alr eady published more than two hundreds scientific articles [2] on heavy io n physics. These articles discuss in detail various methods for calculatin g azimuthal fluxes of charged particles: the method of the true reaction p lane\, the second and fourth order cumulants\, two-particle correlations\, etc [3\,4]. This work will be devoted to the study of these methods and t heir implementation in the Monte Carlo generator HYDJET++ [5].\n\nHYDJET++ is a Monte Carlo model for generating relativistic collisions of heavy io ns. It includes a combination of two independent components: a soft hydrod ynamic part for low-energy particles and a hard part for jets and hadrons\ , taking into account the effect of their quenching due to energy losses i n a dense matter. Initially\, the azimuthal flows of charged particles in the HYDJET++ generator are calculated using the true reaction plane method [6]. In the current work\, we will demonstrate the results of integrating another methods into the HYDJET++ model.\n\nThe work considers methods fo r calculating azimuthal flows – elliptical v2 and triangular v3 – in c ollisions of lead and xenon ions. The reaction plane method involves findi ng the angle of the reaction plane and calculating harmonics relative to t his angle. The cumulant method\, accordingly\, implies the calculation of cumulants that take into account correlations between particles. With the help of these methods\, the calculation of flows is carried out\, and the results are compared with those similar in the work of the CMS collaborati on [3\,4].\n\nAs a result of the work\, the generation of relativistic col lisions of lead ions at an energy of √sNN = 5.36 TeV per nucleon pair in c.m.s. and xenon with an energy of √sNN = 5.44 TeV per nucleon pair in c.m.s. Elliptical v2 and triangular v3 flows were calculated using various methods. The methods were analyzed and the obtained results were compared with the results of the CMS experiment [3\,4]. This work will allow us to adjust the generator model in the future and identify areas in which the model does not perform well enough and future developing. \n\n1. S. Chatr chyan et al. (CMS Collaboration). The CMS experiment at the CERN LHC // J. Instrum. 2008. No. 3\, S08004.\n2. CMS Collaboration. CMS heavy-ion physi cs publications http://cms-results.web.cern.ch/cms-results/public-results/ publications/HIN/\n3. S. Pandey\, B. K. Singh. Anisotropic flow and correl ations between azimuthal anisotropy Fourier harmonics in Xe–Xe collision s at √sNN = 5.44 TeV under HYDJET++ framework // Journal of Physics G: Nuclear and Particle Physics\,2022 // arXiv:2107.01880. 2021.\n4. S. Pande y\, B.K. Singh. Transverse momentum spectra and suppression of charged had rons in deformed Xe–Xe collisions at √sNN = 5.44 TeV using HYDJET++ m odel // arXiv:2210.08527. 2022.\n5. I. P. Lokhtin\, L. V. Malinina\, S. V. Petrushanko\, A. M. Snigirev\, I. Arsene\, K. Tywoniuk. Heavy ion event g enerator HYDJET++ (HYDrodynamics plus JETs) // Comput. Phys. Commun. 2009. V. 180\, 779.\n6. Д. А. Мягков\, С. В. Петрушанко. Э ллиптический и триангулярный потоки зар яженных частиц в релятивистских столкно вениях ядер Xe и Pb в модели HYDJET++ и экспери менте CMS (LHC) // Учен. зап. физ. фак-та Моск. у н-та. 2023. № 3. 2330205.\n\nhttps://indico.particle.mephi.ru/event/4 36/contributions/4344/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4344/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the beam energy dependence of anisotropic flow using the scaling relations. DTSTART;VALUE=DATE-TIME:20241025T061500Z DTEND;VALUE=DATE-TIME:20241025T063000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4343@cern.ch DESCRIPTION:Speakers: Arkadiy Taranenko (NRNU MEPhI)\nAnisotropic flow mea surements of produced particles in relativistic heavy-ion collisions play an essential role in the studies of transport properties of the strongly i nteracting matter. In this work we provide the results of the most compreh ensive systematic study of the beam energy dependence of anisotropic flow based on existing data and discuss them using different scaling relations for azimuthal anisotropy.\n\nhttps://indico.particle.mephi.ru/event/436/co ntributions/4343/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4343/ END:VEVENT BEGIN:VEVENT SUMMARY:Methods for centrality determination of Xe+Cs(I) collisions at $E_ {kin}=3.8A$ GeV at BM@N DTSTART;VALUE=DATE-TIME:20241024T153500Z DTEND;VALUE=DATE-TIME:20241024T155000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4333@cern.ch DESCRIPTION:Speakers: Alexander Demanov ()\nThe centrality that describes the initial collision geometry is crucial for interpreting experimental da ta on heavy ion collisions.\nWe present the procedures of centrality dete rmination for the Baryonic Matter at Nuclotron (BM@N) experiment based on the multiplicities of produced particles. The validity of the procedures is assessed using the experimental data for Xe+Cs(I) collisions at beam k inetic energy of 3.8 A GeV.\n\nhttps://indico.particle.mephi.ru/event/436/ contributions/4333/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4333/ END:VEVENT BEGIN:VEVENT SUMMARY:Collective effects in string models: machine learning perspective DTSTART;VALUE=DATE-TIME:20241024T152000Z DTEND;VALUE=DATE-TIME:20241024T153500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4334@cern.ch DESCRIPTION:Speakers: Evgeny Andronov (Saint Petersburg State University)\ nThis work focuses on exploring the potential of machine learning methods in relativistic nuclear physics to differentiate between various physical theories\, and consequently\, gain a deeper understanding of the underlyin g physical processes in ultra-high-energy nuclear collisions.\nRecent find ings from modeling p+p and AA interactions within the color string fusion framework suggest that it may be possible to describe the experimental azi muthal asymmetry event-by-event in a unified way across different collidin g systems. This description becomes possible by considering two mechanisms of string interactions: 1) changes in the strength of the color field in the area where strings overlap in the transverse plane\, and 2) Lorentz bo osts applied to particles resulting from string motion due to mutual attra ction. We demonstrate that it is possible to train machine learning algori thms using pT-φ distributions from event-by-event data in order to distin guish between different sources of collective behaviour.\n\nThis work was supported by the Russian Science Foundation under grant no.23-72-01061.\n\ nhttps://indico.particle.mephi.ru/event/436/contributions/4334/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4334/ END:VEVENT BEGIN:VEVENT SUMMARY:Phase diagram of two and three color QCD with various imbalances DTSTART;VALUE=DATE-TIME:20241024T150500Z DTEND;VALUE=DATE-TIME:20241024T152000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4335@cern.ch DESCRIPTION:Speakers: Roman Zhokhov (IHEP Protvino\, IZMIRAN Troitsk)\nPha se diagram of two color and three color QCD are reviewed. The dualities of QCD phase diagram are discussed in both two and three color cases. It h as been shown that the phase diagram of two color QCD is quite helpful and it has a lot of common features with three color one\, and predictions re cently made in two color QCD was shown to hold qualitatively in real three color QCD. Showing that two color QCD is indeed great lab to study dense quark matter. The dualities has been shown in two color QCD. Duality betwe en chiral symmetry breaking and charged pion condensation phenomena has be en demonstrated from first principles in QCD itself. Also there will be d iscussed color superconductivity phenomenon and the influence of chiral im balance on its properties.\n\nDespite the fact that the thermodynamic pote ntial in three color case ($N_c=3$) does not have properties of all three dualities found in the two-color case\, it turned out that the phase portr ait qualitatively contains these dualities.\n\nhttps://indico.particle.mep hi.ru/event/436/contributions/4335/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4335/ END:VEVENT BEGIN:VEVENT SUMMARY:Self-similarity and Cumulative Hadron Production in Heavy Ion Col lisions at High Energies DTSTART;VALUE=DATE-TIME:20241024T145000Z DTEND;VALUE=DATE-TIME:20241024T150500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4336@cern.ch DESCRIPTION:Speakers: Mikhail Tokarev (Joint Institute for Nuclear researc h)\nSearch for signatures of phase transitions and determination of phase diagram of nuclear matter created in A+A collisions are in the heart of th e heavy ion programs performed present at RHIC\, LHC and future experiment s at NICA and FAIR.\nIn the paper the hypothesis of the self-similarity of hadron production in relativistic heavy-ion collisions to search for the phase transition in nuclear matter is discussed. Using the established fea tures of z-scaling is suggested to reveal the signatures of new physics in the cumulative region. Selection of the cumulative events is assumed to e nrich data sample by a new type of collisions characterized by higher ener gy density and more compressed matter. We expect that this would allow fin ding clearer signatures of phase transition\, location of a critical point and studying extreme conditions in heavy ion collisions. The change in th e parameters of the theory (a specific heat and fractal dimensions) near t he critical point is considered a signature of new physics. The results of data analysis of cumulative production in p+A and A+A collisions in colli der and fixed target mode are discussed.\n\n1. M.Tokarev and I.Zborovský\ , Phys. Part. Nucl. Lett.\, 7 (2010) 160.\n2. M.Tokarev\, I.Zborovský and A.A.Aparin\, Phys. Part. Nucl. Lett.\, 12 (2015) 324.\n3. M.Tokarev\, A.K echechyan\, and I.Zborovský\, Nucl. Phys.\, A 993 (2020) 121646).\n4. M.T okarev and I.Zborovský\, Nucl. Phys.\, A1025 (2022) 122492.\n\nhttps://in dico.particle.mephi.ru/event/436/contributions/4336/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4336/ END:VEVENT BEGIN:VEVENT SUMMARY:Direct Photon Production and Correlations in Pb-Pb Collisions at $ \\sqrt{s_{NN}} = 5.02$ TeV DTSTART;VALUE=DATE-TIME:20241024T143500Z DTEND;VALUE=DATE-TIME:20241024T145000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4337@cern.ch DESCRIPTION:Speakers: Vladislav Kuskov ()\nExperimental studies in the rec ent decades have provided strong evidence for the formation of hot and den se nuclear matter in heavy-ion collisions. Such matter is predicted by Qua ntum Chromodynamics (QCD) to be a quark-gluon plasma (QGP) consisting of d econfined quarks and gluons. Direct photons\, which are not originating fr om hadron decays\, are one of the key experimental observables of QGP. At low transverse momenta ($p_{\\mathrm{T}}$)\, an exponential spectrum of th ermal direct photons ($p_{\\rm{T}}\\le 2$ GeV/$c$) captures features of sp ace-time evolution of the QGP expansion and the hadronic gas. Additionally \, the thermal direct photon spectrum could be expanded down to lower $p_{ \\mathrm{T}}$ using correlations of soft photons. Hanbury Brown and Twiss (HBT) correlation of direct photons can shed light on the space-time prope rties of QGP. ALICE is capable to measure photons in wide range of $p_{\\m athrm{T}}$\, exploiting detectors the tracking system for measurements of photon conversion into $e^+e^-$ pairs. High-$p_{\\mathrm{T}}$ photons are measured with electromagnetic calorimeters EMCal and PHOS. In this talk\, the direct photon production and HBT correlations in Pb--Pb collisions at $\\sqrt{s_{NN}} = 5.02$ TeV with ALICE are reported.\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4337/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4337/ END:VEVENT BEGIN:VEVENT SUMMARY:Multiplicity-dependent properties of multipatcile production at hi gh energy in extended multipomeron exchange model DTSTART;VALUE=DATE-TIME:20241024T140000Z DTEND;VALUE=DATE-TIME:20241024T141500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4339@cern.ch DESCRIPTION:Speakers: Vladimir Kovalenko (Saint Petersburg State Universit y)\nA new generalization of the Multipomeron exchange model (MEM) [1-3] fo r pp collisions is proposed\, taking into account the effect of event-by-e vent string tension fluctuations [4]. It is shown that the new version of the MEM correctly reproduces the characteristic thermal behavior of $p_\\m athrm{T}$ spectra in a wide energy range. In addition\, the new generaliza tion of the MEM improves the description of multiplicity distributions by replacing the Poisson distribution from one string with the discrete Gauss ian distribution [5]. Calculations show that the new version of the MEM co rrectly reproduces the characteristic oscillating behavior of modified com binants in pp collisions over a wide energy range [5]. Simultaneously\, th e $p_\\mathrm{T}$-multiplicity correlation functions are shown to be satis factorily described together with the multiplicity-dependent $p_\\mathrm{T }$ spectrum [6]. Possible applications of the new model for describing the relativisti heavy-ion collisions and opportunities for experiments at the NICA collider (Dubna) are discussed.\n\nThe authors acknowledge Saint-Pet ersburg State University for a research project 95413904.\n\n1. Armesto\, N.\; Derkach\, D.A.\; Feofilov\, G.A. p(t)-multiplicity correlations in a multi-Pomeron-exchange model with string collective effects. Phys. Atom. N ucl. 2008\, 71\, 2087–2095. https://doi.org/10.1134/S1063778808120090\n\ n2. Bodnia\, E.\; Derkach\, D.\; Feofilov\, G.\; Kovalenko\, V.\; Puchkov\ , A. Multi-pomeron exchange model for pp and $p\\bar{p}$ collisions at ult ra-high energy. PoS QFTHEP2013 2013\, 60. https://doi.org/10.22323/1.183.0 060\n\n3. Kovalenko\, V.\; Feofilov\, G.\; Puchkov\, A.\; Valiev\, F. Mult ipomeron Model with Collective Effects for High-Energy Hadron Collisions. Universe 2022\, 8\, 246. https://doi.org/10.3390/universe8040246\n\n4. Bia las\, A. Fluctuations of the string tension and transverse mass distributi on. Phys. Lett. B. 1999\, 466\, 301–304. https://doi.org/10.1016/S0370-2 693%2899%2901159-4\n\n5. Vechernin\, V.\; Andronov\, E.\; Kovalenko\, V.\; Puchkov\, A. Multiplicity Distributions and Modified Combinants in the Mu ltipomeron Model of pp Interaction at High Energies. Universe 2024\, 10\, 56. https://doi.org/10.3390/universe10020056\n\n6. Acharya\, S. et al. Mul tiplicity dependence of charged-particle production in pp\, p-Pb\, Xe-Xe a nd Pb-Pb collisions at the LHC. Phys. Lett. B 2023\, 138110 https://doi.or g/10.1016/j.physletb.2023.138110\n\nhttps://indico.particle.mephi.ru/event /436/contributions/4339/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4339/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent progress in Asymptotic safety DTSTART;VALUE=DATE-TIME:20241024T151200Z DTEND;VALUE=DATE-TIME:20241024T152400Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4324@cern.ch DESCRIPTION:Speakers: Alfiia Mukhaeva ()\nFree and interacting fixed point s of the renormalisation group play an important role in particle and stat istical physics. High energy fixed points such as in asymptotic freedom or asymptotic safety are crucial for a fundamental definition\nof quantum fi eld theory. Low energy fixed points relate to (quantum) phase transitions and critical phenomena.\n\nIn this talk\, I explain how and why weakly int eracting fixed points arise in general 4d QFTs. This covers general theore ms\, necessary and sufficient conditions for existence\, and explicit exam ples. In addition\, I also review the last progress in calculation of beta functions\, anomalous dimensions up to four loop in the gauge and three l oop in the Yukawa and scalar couplings\, and some implications of our resu lts for conformal field theory and particle physics.\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4324/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4324/ END:VEVENT BEGIN:VEVENT SUMMARY:keV dark matter in the Minimal left-right symmetric model with TeV scale gauge bosons DTSTART;VALUE=DATE-TIME:20241024T150000Z DTEND;VALUE=DATE-TIME:20241024T151200Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4325@cern.ch DESCRIPTION:Speakers: Elena Fedotova (SINP MSU)\nThe possibility of the li ghtest sterile neutrino with a mass of about a few keV as warm dark matter (DM) in the framework of the Minimal left-right symmetric model (MLRM) ba sed on the SU(3)c*SU(2)L*SU(2)R*U(1) gauge group is considered. Only few p arameters of the model are free which makes it rather predictable and unam biguous. We thoroughly consider a parametrization in the lepton sector and obtain a general form for mixing matrices and mixing parameters. Cosmolog ical and astrophysical constraints on DM neutrino are analyzed. In the cas e of the mass of W_R of about 5 TeV\, the model phenomenology consistent w ith current experimental data is considered.\n\nhttps://indico.particle.me phi.ru/event/436/contributions/4325/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4325/ END:VEVENT BEGIN:VEVENT SUMMARY:Four-vector deformations and holographic principle DTSTART;VALUE=DATE-TIME:20241024T141200Z DTEND;VALUE=DATE-TIME:20241024T142400Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4330@cern.ch DESCRIPTION:Speakers: Timophey Petrov (MIPT)\nThe study of theories relat ed to experimental physics\, such as supersymmetric gauge theories (SUSY Q FT) and strongly correlated systems\, is very important for modern science . String theory\, particularly the AdS/CFT correspondence\, is a key tool for these studies. It allows us to develop methods to study and create gau ge field theories and understand non-Lagrangian operators through supergra vity solutions.\nThe Yang-Baxter deformation technique maps nonlinear tran sformations from supergravity solutions to gauge field theories using AdS/ CFT. This non-linear transformation\, based on hidden symmetries of superg ravity equations\, was initially limited to Abelian isometries. However\, it has been extended to non-Abelian isometries. This generalization provid es a way to find a new non-supersymmetric conformal manifold in gauge fiel d theories.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/43 30/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4330/ END:VEVENT BEGIN:VEVENT SUMMARY:Effective potentials in LLA for diverse non-renormalisable models in the large N limit DTSTART;VALUE=DATE-TIME:20241024T152400Z DTEND;VALUE=DATE-TIME:20241024T153600Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4323@cern.ch DESCRIPTION:Speakers: Ravil Iakhibbaev (JINR BLTP)\nThe study of the effec tive potential for non-renormalisable (super)symmetric models leads to rec urrence relations for the leading singularities. These relations can be tr ansformed into generalised renormalization-group (RG) equation which can b e analyzed in detail. In some special cases this equation can be solved ex actly.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4323/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4323/ END:VEVENT BEGIN:VEVENT SUMMARY:An Improved String Hadronization Model: ATROPOS DTSTART;VALUE=DATE-TIME:20241024T153600Z DTEND;VALUE=DATE-TIME:20241024T154800Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4322@cern.ch DESCRIPTION:Speakers: Roman Nikolaenko ()\nUp to this date the process of hadronization is considered to be a “black box” as its soft nature doe s not allow to build a consistent theory. Instead\, different models are u sed to describe the production of final-state hadrons\, among which string models are considered to be the most successful.\n\nThere are some unreso lved problems of the hadronization that existing models fail to prevail: t he inability to use the same model to describe the fragmentation of light and heavy quarks\, no angular momentum conservation\, only simplified stri ng dynamics and the use of initial conditions that do not satisfy the gaug e of the string theory.\n\nTo overcome these challenges\, a new model\, ca lled ATROPOS\, was developed. It is based on the Area Decay Law that steer s the fragmentation process\, and the open relativistic string dynamics is derived from (modified) Nambu-Goto action. To take into account the masse s of heavy quarks\, model uses the apparatus\, suggested by Barbashov and Nesterenko.\n\nA real highlight of the study is the investigation of the w ays to define the initial conditions that are used to calculate string mov ement. Interesting results are obtained by considering the restrictions im posed by Virasoro conditions and 4-momentum vector and angular momentum te nsor conservation. It is shown\, that a very non-trivial method to define initial state of the string must be used even for the simplest case of the zero-gluon string with free ends.\n\nThe first results of the hadronizati on simulation performed for e+e- events are presented and discussed. The i nfluence of the string angular momentum on the hadron production is consid ered.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4322/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4322/ END:VEVENT BEGIN:VEVENT SUMMARY:CP-violation and renormalization group effects in the Higgs alignm ent limit of the MSSM DTSTART;VALUE=DATE-TIME:20241024T144800Z DTEND;VALUE=DATE-TIME:20241024T150000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4326@cern.ch DESCRIPTION:Speakers: Elena Fedotova (SINP MSU)\nThe current experimental data of New-Physics searches have excluded the simplest scenarios of the m inimal supersymmetry (SUSY). At the same time\, the Minimal Supersymmetric Standard model (MSSM) in general remains a possible candidate as the Stan dard Model extension. We propose a phenomenological scenario with nonstand ard regime of softly broken SUSY-parameters ("regime of large A\, mu"). Fo r such a regime\, radiative corrections to the dimension-six operators tha t inevitably arise at the loop level of effective Higgs potential decompos ition become considerable. The Higgs alignment limit valid for the general Two-Higgs Doublet Model (THDM) with all possible CP-violating sources is investigated: it is shown that two different parametric scenarios\, I and II\, can be realized. The corresponding CP-violating effects are evaluated . It is found that the renormalization group improvement of radiative corr ections refines predictions for the mass of the SM-like Higgs boson by abo ut 2% for the Higgs alignment limit I and by about 9% for the Higgs alignm ent limit II.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/ 4326/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4326/ END:VEVENT BEGIN:VEVENT SUMMARY:Holographic model for color superconductivity in d-dimension DTSTART;VALUE=DATE-TIME:20241024T142400Z DTEND;VALUE=DATE-TIME:20241024T143600Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4329@cern.ch DESCRIPTION:Speakers: Nguyen Hoang Vu (BLTP JINR)\nWe extend the notion of color superconductivity for d-dimension AdS spacetime to find the conditi on of Nc to give the general diquarks condensate in d-1 dimension boundary which only use the Einstein Maxwell gravity in d-dimension. We find the relation between Nc and number of dimension of AdS spacetime.\n\nhttps://i ndico.particle.mephi.ru/event/436/contributions/4329/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4329/ END:VEVENT BEGIN:VEVENT SUMMARY:The EW- related uncertainties in the PT QCD variation of the runn ing heavy quarks masses DTSTART;VALUE=DATE-TIME:20241024T143600Z DTEND;VALUE=DATE-TIME:20241024T144800Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4327@cern.ch DESCRIPTION:Speakers: Andrei Kataev (INR RAS)\nIt is shown that the existi ng ambiguities in the theoretical in the\ndefinitions of Higgs vacuum ex pectation value result in the PT-related ambiguities \nof the electroweaek PT effects \, which correlate with PT QCD variation \nof running heavy quark masses scale-dependency The importance of taking these unfixed previ ously uncertainties in the theory predictions for the decays widths of Hig gs boson to \nheavy quark antiguark pairs is clarified\n\nhttps://indico.p article.mephi.ru/event/436/contributions/4327/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4327/ END:VEVENT BEGIN:VEVENT SUMMARY:Gribov copy effects in lattice gluodynamics DTSTART;VALUE=DATE-TIME:20241024T140000Z DTEND;VALUE=DATE-TIME:20241024T141200Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4331@cern.ch DESCRIPTION:Speakers: Vitaly Bornyakov (NRC “Kurchatov Institute” - IH EP\, Protvino)\nAfter a brief review of Gribov copy effects in Landau gaug e we present recent results of studies of these effects in the Maximal Abe lian gauge in lattice gluodynamics. In particular\, we show that one can find Gribov copies with nice decomposition of the static quark potential i nto monopole and monopoleless components.\n\nhttps://indico.particle.mephi .ru/event/436/contributions/4331/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4331/ END:VEVENT BEGIN:VEVENT SUMMARY:Mueller-Navelet dijet production in the High-Energy Factorization approach DTSTART;VALUE=DATE-TIME:20241025T073000Z DTEND;VALUE=DATE-TIME:20241025T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4315@cern.ch DESCRIPTION:Speakers: A. Chernyshev (Lomonosov Moscow State University)\nT he production of Mueller-Navelet dijets is studied within the framework of the\nHigh-Energy Factorization approach [1\,2\,3]. Such processes are con sidered to be\nsensitive to the effects of BFKL resummation [4]. In the Re f.[5] it was shown\nthat experimental data for dijets with large rapidity gaps can't be described\nusing NLO DGLAP based Monte-Carlo generators. In the study\, we predict cross\nsections for the production of dijets using the Reggeon-Reggeon-Particle-Particle effective vertices obtained within the formalism of the L.N. Lipatov's Effective Field Theory [6]. Calculatio ns are performed using two different unintegrated PDF sets [7\,8].\n\n[1] J. Collins and R. Ellis. Nucl.Phys.B 360 (1991) 3-30\;\n\n[2] S. Catani an d F. Hautmann. Nucl.Phys.B 427 (1994) 475-524\;\n\n[3] L.V. Gribov\, E.M. Levin\, M.G. Ryskin. Phys.Rept. 100 (1983) 1-150\;\n\n[4] A. Mueller and H . Navelet. Nucl.Phys.B 282 (1987) 727-744\;\n\n[5] CMS Collaboration. JHEP 03 (2022) 189\;\n\n[6] L.N. Lipatov. Nucl.Phys.B 452 (1995) 369-400\;\n\n [7] M. Nefedov and V. Saleev. Phys.Rev.D 102 (2020) 114018\;\n\n[8] J. Blu mlein. DESY-95-121.\n\nhttps://indico.particle.mephi.ru/event/436/contribu tions/4315/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4315/ END:VEVENT BEGIN:VEVENT SUMMARY:Manifestation of the neutrino magnetic moments in the high- energy neutrinos flavour ratios DTSTART;VALUE=DATE-TIME:20241025T074500Z DTEND;VALUE=DATE-TIME:20241025T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4314@cern.ch DESCRIPTION:Speakers: Artem Popov (Moscow State University)\nNeutrino prop agation in Galactic and extragalactic magnetic fields is considered. We ex tend an approach developed in [1] to describe neutrino flavour and spin os cillations on astrophysical baselines using wave packets. The evolution eq uations for the neutrino wave packets in uniform and non-uniform magnetic fields are derived. The analytical expressions for neutrino flavour and sp in oscillations probabilities accounting for damping due to the wave packe t separation are obtained for the case of a uniform magnetic field. It is shown that terms in the flavour oscillations probabilities that depend on the magnetic field strength are characterized by two coherence lengths. On e of the coherence lengths coincides with the coherence length for neutrin o oscillations in vacuum\, while the second one is proportional to the cub e of the average neutrino momentum $p_0^3$. The probabilities of flavour a nd spin oscillations are calculated numerically for neutrino interacting w ith the non-uniform Galactic magnetic field. It is shown that oscillations on certain frequencies are suppressed on the Galactic scale due to the ne utrino wave packets separation. The flavour compositions of high-energy ne utrino flux coming from the Galactic centre and ultra-high energy neutrino s from an extragalactic source are calculated accounting for neutrino inte raction with the magnetic field and decoherence due to the wave packet sep aration. It is shown that for neutrino magnetic moments $\\sim 10^{-13} \\ mu_B$ and larger these flavour compositions significantly differ from ones predicted by the vacuum neutrino oscillations scenario.\n\nBased on:\n\n1 ) A.Popov\, A.Studenikin\, "High-energy neutrinos flavour composition as a probe of neutrino magnetic moments"\, arXiv: https://arxiv.org/abs/2404.0 2027.\n\n2) A.Popov\, A.Studenikin\, Manifestations of nonzero Majorana CP -violating phases in oscillations of supernova neutrinos\, Phys.Rev.D 103 (2021) 11\, 115027.\n\n3) A.Popov\, A.Studenikin\, Neutrino eigenstates an d flavour\, spin and spin-flavour oscillations in a constant magnetic fiel d\, Eur.Phys.J.C 79 (2019) 2\, 144.\n\nhttps://indico.particle.mephi.ru/ev ent/436/contributions/4314/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4314/ END:VEVENT BEGIN:VEVENT SUMMARY:Small-$p_T^{}$ production of $J/\\psi$ mesons within Soft Gluon Re summation Approach DTSTART;VALUE=DATE-TIME:20241025T071500Z DTEND;VALUE=DATE-TIME:20241025T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4316@cern.ch DESCRIPTION:Speakers: Kirill Shilyaev (Samara University)\nPrompt heavy qu arkonium production is well described within the collinear parton model in the next-to-leading order of perturbaive QCD at kinematical region of $p_ T^{} \\gg M$ where $M$ is a mass of a quarkonium state. But the region of small $p_T^{}$ is still being researched and the factorisation approach wh ich is valid here is TMD-factorisation (transverse-momentum dependent). We studied $J/\\psi$ production in collision of protons at $\\sqrt{s} = 200\ , 27$ and $19.4$ GeV. Certainly\, we used Nonrelativistic QCD (NRQCD) as a standard hadronisation model for charmonium production\, and we extracted nonperturbative matrix elements for octet color states of the NRQCD from a set of experimental data on prompt $J/\\psi$ production because color si nglet model can't be considered as sufficient for experimental data descri ption.\n\nThe TMD approach is a general factorisation model for $p_T^{} \\ ll M$ region [1]. One of the realisations of the TMD-factorisation is a so called Soft Gluon Resummation approach [2] where soft gluon emission by p artons is considered\, evolution of the TMD parton distribution functions is controlled by the Collins -- Soper equations [3] though the TMD distrib ution is partly reduced to the collinear one. We perform our study at the LO$+$LL approximation for now. We describe data from PHENIX Collaboration at $\\sqrt{s} = 200$ GeV and from NA3 Collaboration at $\\sqrt{s} = 19.4$ GeV and do predictions for future SPD NICA experiments at $\\sqrt{s} = 2 7$ GeV. We considered both gluons and quarks as initial partons\, we also estimated a contribution of $P$-wave charmonium production and calculated polarised $J/\\psi$ production as an angular coefficient $\\lambda$. The I nverse-Error Weighting Scheme [4] is used as an approach for matching of c ollinear and TMD factorisations.\n\nReferences:\n\n[1] J. C. Collins. Foun dations of Perturbative QCD\, Cambridge Univ. Press\, Cambridge (2011).\n\ n[2] J. Bor and D. Boer. TMD evolution study of the $\\cos 2\\phi$ azimuth al asymmetry in unpolarized $J/\\psi$ production at EIC\, Phys. Rev. D 106 \, 1 (2022).\n\n[3] J. C. Collins\, D. E. Soper\, and G. Sterman. Transver se momentum distribution in Drell-Yan pair and $W$ and $Z$ boson productio n\, Nuclear Physics B 250 (1-4)\, 199--224 (1985).\n\n[4] M. G. Echevarria \, T. Kasemets\, J.-P. Lansberg\, C. Pisano\, A. Signori. Matching factori zation theorems with an inverse-error weighting\, Phys. Lett. B 781\, 161- -168 (2018).\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 316/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4316/ END:VEVENT BEGIN:VEVENT SUMMARY:Exact calculation of photon polarization observables in Bethe-Heit ler process DTSTART;VALUE=DATE-TIME:20241025T064500Z DTEND;VALUE=DATE-TIME:20241025T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4318@cern.ch DESCRIPTION:Speakers: Yury Bystritskiy (JINR)\nThe effects of polarization transfer from the initial electron to the bremsstrahlung photon in the el ectron–nucleus scattering (Bethe-Heitler process) are considered. The ca lculation is done without the assumption of smallness of the electron mass nor the limitation to small photon emission angles. Detailed comparison w ith a series of preceding papers is done. The results are applicable to th e modelling of the polarized cross sections at low energies and beyond\, e ven at a few MeV.\n\nhttps://indico.particle.mephi.ru/event/436/contributi ons/4318/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4318/ END:VEVENT BEGIN:VEVENT SUMMARY:Associated $J/\\psi$ and photon production in the Parton Reggeizat ion Approach at high energy DTSTART;VALUE=DATE-TIME:20241025T070000Z DTEND;VALUE=DATE-TIME:20241025T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4317@cern.ch DESCRIPTION:Speakers: Lev Alimov (Samara University)\nThe study of the ass ociated production of $J/\\psi$-mesons and\nphotons is very impotent to ve rify perturbative quantum\nchromodynamics\, factorization approaches\, hea vy quark to heavy\nquarkonium hadronization models and to extracting the P arton\nDistribution Function (PDF) of gluon in a proton from experimental\ ndata. In this paper\, we study the associated production of\n$J/\\psi$-me sons and photons at the energies of the Large Hadron\nCollider using the P arton Reggeization Approach (PRA) [1]\, which is\nbased on Lipatov's effec tive field theory [2] and the modified\nKimber-Martin-Ryskin model for uni ntegrated PDFs [3\, 4]. We use two\ndifferent heavy-quark to heavy quarkon ium hadronization models: the\nnon-relativistic quantum chromodynamics (NR QCD) [5] and the improved\ncolor evaporation model (ICEM) [6].\n\nWe have found that the PRA based predictions for production cross\nsections are hi gher than next-to-leading order collinear parton\nmodel results. We have s hown that contributions of the direct\nproduction processes via the color- octet intermediate states in the\nNRQCD are suppressed relatively to the p rocess via the color-singlet\nintermediate state\, so the Color Singlet Mo del (CSM) can be used for\npredictions at the $p_{TJ/\\psi}\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4317/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4317/ END:VEVENT BEGIN:VEVENT SUMMARY:Inverse gluon emission in dilepton production at CMS LHC DTSTART;VALUE=DATE-TIME:20241025T063000Z DTEND;VALUE=DATE-TIME:20241025T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4319@cern.ch DESCRIPTION:Speakers: Vladimir Zykunov (JINR)\nInverse gluon emission in t he dilepton production process in hadron collisions for Large Hadron Colli der (LHC) experimental program aimed at exploring the Drell-Yan process ar e estimated in details. Numerical analysis of inverse emission effects to observable quantities (cross sections and forward-backward asymmetry) is p erformed in a wide kinematical region including the CMS LHC experiment in Run3/HL regime which corresponds to ultra-high energies and dilepton invar iant masses. Effective technics for analysis of different radiative contri butions influence on forward-backward asymmetry using two additive relativ e corrections is suggested.\n\nhttps://indico.particle.mephi.ru/event/436/ contributions/4319/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4319/ END:VEVENT BEGIN:VEVENT SUMMARY:Multiplicity fluctuations in the string model in pp collisions at LHC energies DTSTART;VALUE=DATE-TIME:20241025T060000Z DTEND;VALUE=DATE-TIME:20241025T061500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4321@cern.ch DESCRIPTION:Speakers: Svetlana Belokurova (Saint Petersburg State Universi ty)\nThe fluctuation of the number of charged particles in a given rapidit y interval of observation was studied. Analytical expressions and the Mont e Carlo modeling in the framework of a quark-gluon string model were used to calculate scaled and robust variance of the multiplicity in the case wi th string fusion and without it. The used distribution of primary strings in the transverse plane is consistent with the Regge approach. The string fusion effects were taken into account by implementing of a lattice (grid) in the impact parameter plane. \nThe value of the scaled and robust varia nce of the multiplicity for pp collisions is calculated at three initial e nergies: 0.9\, 2.76 and 7 TeV\, both with and without taking into account the processes of string fusion. The results were compared with the data ob tained by ALICE collaborations at CERN. The results of these analytical ca lculations coincide with the results of MC simulations\, this testifies to the correctness of the MC algorithm used. It is shown that for pp collisi ons at LHC energies\, the fluctuations of the particle number from a given string cluster are\, due to the presence of short-range correlations betw een particles\, significantly larger than the Poisson ones.\n\nThe authors acknowledge Saint-Petersburg State University for a research project 9541 3904\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4321/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4321/ END:VEVENT BEGIN:VEVENT SUMMARY:Quark counting rules for the production of cumulative pions with l arge transverse momenta DTSTART;VALUE=DATE-TIME:20241025T061500Z DTEND;VALUE=DATE-TIME:20241025T063000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4320@cern.ch DESCRIPTION:Speakers: Semyon Yurchenko (Saint Petersburg State University\ , Laboratory of ulta-high energy physics)\nThis work focuses on the calcul ation of quark counting rules for the inclusive production of pions at lar ge transverse momenta in the cumulative region—a kinematic domain forbid den for single nucleon-nucleon interactions. This region\, which cannot be accessed through single nucleon-nucleon interactions\, becomes relevant i n nuclear collisions and can be observed using the MPD and SPD detectors a t the NICA complex. Unlike high-energy colliders like RHIC and LHC\, where this phenomenon cannot be studied due to kinematic limitations\, the inte rmediate energy collisions at NICA provide a distinctive opportunity to in vestigate these cumulative effects in detail.\n\nThe concept of the flucto n\, a cluster of cold\, dense quark-gluon matter with high baryon density\ , plays a central role in this context. From a modern perspective\, flucto ns are seen as temporary\, highly localized concentrations of quarks and g luons within the colliding nuclei\, and their presence enables the product ion of cumulative particles during the collision. If a flucton is present during nucleon collisions\, it can trigger the production of particles tha t exhibit unusual kinematic properties\, including those with large transv erse momenta at mid-rapidities.\n\nBuilding on the earlier work of V. V. V echernin and M. A. Braun [1-4]\, who developed a microscopic quark-parton model for particle production in the fragmentation region of one of the co lliding nuclei\, we extend this framework to the new kinematic region char acterized by high transverse momentum. In this extended region\, we observ e a shift in the proton-to-pion yield ratio when compared to cumulative pa rticle production in the traditional fragmentation region. This is largely due to the different underlying mechanisms of particle formation: while c umulative protons are predominantly formed through the coherent recombinat ion of three quarks from a flucton\, cumulative pions are primarily produc ed via the fragmentation of a single quark [3\, 4\, 9]. We compare the ob tained theoretical results with the results of our preliminary estimates o f particle yields in this region based on a more phenomenological approach [5-7].\n\nMoreover\, our work reveals the potential for studying flucton- flucton interactions—a rare and intriguing process—in the new cumulati ve region at mid-rapidities. Unlike the fragmentation region\, where such interactions are impossible to observe\, this region opens up the possibil ity for detailed experimental investigation. Notably\, this process can be explored in detail using dd (deuteron-deuteron) collisions at the NICA SP D\, where both deuterons may exist as flucton states at the moment of coll ision. In this scenario\, the absence of additional nucleon-nucleon intera ctions reduces background\, simplifying the detection of cumulative partic les in correlation with those originating from flucton fragmentation [8]. The higher collision rate at SPD compared to MPD also enhances the likelih ood of observing rare cumulative events\, making SPD a particularly valuab le tool for these studies.\n\nThe work was supported by the Russian Scienc e Foundation grant 23-12-00042.\n\n1. M.A. Braun\, V.V. Vechernin\, Nucl. Phys. B 427\, 614-640 (1994).\n2. M.A. Braun\, V.V. Vechernin\, Phys. Atom . Nucl. 63\, 1831-1834 (2000).\n3. M.A. Braun\, V.V. Vechernin\, Theor. Ma th. Phys. 139\, 766-786 (2004).\n4. V.V. Vechernin\, AIP Conf. Proc. 1707\ , 060020 (2016).\n5. V.V. Vechernin\, Phys. Part. Nuclei 52\, 604-608 (202 1).\n6. V.I. Zherebchevsky\, V.P. Kondratiev\, V.V. Vechernin\, S.N. Igolk in\,\nNuclear Inst. and Methods in Physics Research A 985\, 164668 (2021). \n7. V.V. Vechernin\, Phys. Part. Nuclei 53\, 433-440 (2022).\n8. V. Veche rnin\, S. Belokurova\, S. Yurchenko\, Symmetry 16\, 79 (2024). \n9. V.V. Vechernin\, Phys. Part. Nuclei 54\, 528-535 (2023).\n\nhttps://indico.part icle.mephi.ru/event/436/contributions/4320/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4320/ END:VEVENT BEGIN:VEVENT SUMMARY:Semileptonic decays of charm mesons into orbitally and radially ex cited strange and light mesons DTSTART;VALUE=DATE-TIME:20241025T101500Z DTEND;VALUE=DATE-TIME:20241025T103000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4313@cern.ch DESCRIPTION:Speakers: Ivan Sukhanov (Federal Research Center "Computer Sci ence and Control"\, Russian Academy of Sciences\; Faculty of Physics\, M.V .Lomonosov Moscow State University)\nThe form factors parameterizing weak D and Ds transitions to orbitally and radially excited light mesons are ca lculated in the framework of the relativistic quark model based on the qua sipotential approach. Special attention is paid to the systematic account of the relativistic effects including transformation of the final meson wa ve function from rest to moving reference frame and contributions of inter mediate negative-energy states. Form factors are expressed through the ove rlap integrals of the meson wave functions\, which are taken from previous studies of meson spectroscopy. The form factors are calculated in the who le range of the transferred momentum q2. A convenient parameterization of form factors is given\, which accurately reproduces numerical results. On the basis of these form factors and helicity formalism\, differential and total semileptonic decay rates of D and Ds mesons to excited strange and l ight mesons as well as different asymmetries and polarization parameters a re calculated. A detailed comparison of obtained results with other theore tical calculations and available experimental data is given.\n\nhttps://in dico.particle.mephi.ru/event/436/contributions/4313/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4313/ END:VEVENT BEGIN:VEVENT SUMMARY:Double Assisted Schwinger effect DTSTART;VALUE=DATE-TIME:20241025T100000Z DTEND;VALUE=DATE-TIME:20241025T101500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4312@cern.ch DESCRIPTION:Speakers: Petr Satunin (INR RAS)\nWe study electron-positron p air creation by strong electric field (the Schwinger effect)\, assisted by an electromagnetic plane wave of a weaker amplitude and keV energy range\ , and an additional high-energy (MeV) photon\, by semiclassical worldline instanton approach. We show that the rate of the process is greater that i n the absence of one of these three components. We compare the field confi guration with similar ones disscussed in the literature\, and discuss the possibility of experimental observation of the effect\n\nhttps://indico.pa rticle.mephi.ru/event/436/contributions/4312/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4312/ END:VEVENT BEGIN:VEVENT SUMMARY:Particle production in intensive plane wave background DTSTART;VALUE=DATE-TIME:20241025T094500Z DTEND;VALUE=DATE-TIME:20241025T100000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4311@cern.ch DESCRIPTION:Speakers: Ekaterina Dmitrieva (INR RAS)\nWe study the stabilit y of an intensive plane wave of a massless (or small mass) field due to th e production of massive particles (a process which is perturbatively forbi dden)\, in a toy model of two scalar fields. We apply two methods: first\ , we solve the Heisenberg equation for quantum amplitudes of produced mass ive field in case of arbitrary masses generalizing the solution of (see A. Arza PRD 105 (2022) 3\, 036004) applied to the case of small masses\; and making the Lorentz boost (in case of nonzero mass) from the intense plane wave to intense oscillating condensate. The stability of the latter reduc es to the stability of the Mathieu equation which is a well-known task. Co mparing the results we argue that the generalized Arza solution is related to the case of narrow parametric resonance.\n\nhttps://indico.particle.me phi.ru/event/436/contributions/4311/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4311/ END:VEVENT BEGIN:VEVENT SUMMARY:Generalization of Heitler model for electromagnetic cascade DTSTART;VALUE=DATE-TIME:20241025T093000Z DTEND;VALUE=DATE-TIME:20241025T094500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4310@cern.ch DESCRIPTION:Speakers: Yuri Selivanov ()\nWe consider a generalized Heitler model for QED cascade. An exact formula for the final number of leptons i s obtained by solving the kinetic equations. We demonstrate that in such a model the final number of leptons does not depend on photon and lepton fr ee paths. We derive approximate formulas for the main characteristics of c ascades at high energy\, including the final number of leptons and the cas cade depth. We show that in general the final number of leptons is asympto tically proportional to the energy of seed particle. It is also demonstrat ed how the original Heitler model is reproduced as a special case.\n\nhttp s://indico.particle.mephi.ru/event/436/contributions/4310/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4310/ END:VEVENT BEGIN:VEVENT SUMMARY:Interacting color strings approach to describe puzzling long-range azimuthal correlations in p+p data DTSTART;VALUE=DATE-TIME:20241025T083000Z DTEND;VALUE=DATE-TIME:20241025T084500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4306@cern.ch DESCRIPTION:Speakers: Daria Prokhorova (Saint Petersburg State University) \nIn non-central A+A collisions\, the measured azimuthal flow of particles is well understood in the paradigm of quark-gluon plasma formation. Namel y\, the initial spatial anisotropies in the intersection region of the ove rlap of two nuclei are transferred under large pressure gradients by the a lmost perfect liquid consisting of strongly coupled quarks and gluons to t he momentum asymmetries of final hadrons. In turn\, the same explanation i s not straightforwardly applicable to the surprising evidence of azimuthal anisotropies recently observed in high-multiplicity p+p collisions at LHC as the produced matter may not be thermalized in such a small droplet. In this report\, the new model that does not involve the hydrodynamic phase of the system evolution but can describe the long-range azimuthal correlat ions will be presented. It is based on the formation in a p+p inelastic in teraction a number of colour (quark-gluon) strings that are finite in rapi dity. We consider string attraction and fusion as well as interactions of produced particles with string medium. Results on two-particle angular cor relations and flow harmonics will be presented.\n\nThe authors acknowledge Saint-Petersburg State University for a research project 95413904.\n\nhtt ps://indico.particle.mephi.ru/event/436/contributions/4306/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4306/ END:VEVENT BEGIN:VEVENT SUMMARY:Double spin correlations in the reaction dd→ pnpn and elastic proton-nucleon scattering at large angles DTSTART;VALUE=DATE-TIME:20241025T084500Z DTEND;VALUE=DATE-TIME:20241025T090000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4307@cern.ch DESCRIPTION:Speakers: Yuriy Uzikov (Joiny Institute for Nuclear Researches )\nElastic pp scattering at the invariant mass of the pp-system $\\sqrt{s _{pp}}= 3 - 5$\nGeV and large c.m.s. angles ($\\theta_{cm}=90^\\circ$) d emonstrates a\nvery large double-spin correlation [1]. These kinematical region corresponds to very high momentum trasfer |t|\n where quark countin g rules are valid and color transparency is expected to be observed. On t he other hand\,\n these energies correspond to the thresholds for strangen ess (~ 3 GeV) and charm (~5 GeV) production in pp collisions\, respectiv ely. As was shown in [2]\, the observed strong correlations (cross-section ratio of 4 : 1 for parallel and antiparallel spins of colliding protons) are compatible with the assumption of the formation of uudss̄uud and uudc c̄uud octoquark resonances in the s channel. Moreover\, on the basis of t his assumption\, the authors of Ref. [2] also explained qualitatively an u nusual behavior of the color transparency in reactions of the A(p\, 2p)B t ype and oscillations in the differential cross section\n dσ/dt for elasti c pp scattering in the region of manifestation of quark counting rules. Ho wever\, the last two effects have a different explanation within the nucle ar-filtering model [3]. In this connection one should note that hard dynam ics in elastic pp and pn-scattering may be markedly different\, because t he pn-scattering includes the isoscalar channel in addition to the isovect or one. In view of this\, it is of importance to study the doubly polarize d channel of elastic pn scattering in the same energy range of 3-5 GeV. In principle\, this may be done at the SPD in the dd collisions [4]. We stud ied [5] double spin correlation of the reaction dd-> pnpn within the impu lse (double pole) approximation and found that at zero relative momenta of nucleons in both deuterons\, when the deuteron S-wave dominates\, the tra nsversal and longitudinal- correlation coincides with the similar double-s pin correlation in pp or pn- elastic large angle scattering. Effects of re scatterings and the D-wave contribution are under consideration.\n\n The r esearch is supported under the Scientific Program JINR – Republic of Ka zakstan.\n\n[1] D. G. Crabb\, R. C. Fernow\, P. H. Hansen\, et al. Phys. R ev. Lett. 41\, 1257 (1978).\n\n[2] S. J. Brodsky and G. de Teramond\, Phys . Rev. Lett. 60\, 1924 (1988).\n\n[3] J. P. Ralston and B. Pire\, Phys. Re v. Lett. 49\, 1605 (1982).\n\n[4] V. Abramov et al. Phys. Part. Nucl. 52\, 1044 (2021).\n\n[5] Yu. Uzikov\, A. Temerbayev\, Phys. Part. Nucl. 55\, N 4\, 895 (2024).\n\nhttps://indico.particle.mephi.ru/event/436/contribution s/4307/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4307/ END:VEVENT BEGIN:VEVENT SUMMARY:Cross channel properties of the photon generalized parton distribu tions DTSTART;VALUE=DATE-TIME:20241025T091500Z DTEND;VALUE=DATE-TIME:20241025T093000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4309@cern.ch DESCRIPTION:Speakers: Ilnur Gabdrakhmanov (JINR)\nGeneralized parton distr ibutions (GPD) are being extensively used to describe hard exclusive hadro n processes.\nTwist-2 photon GPDs has been previously derived by calculati on of the photon-photon electromagnetic scattering amplitude.\nThese distr ibutions may give contribution to the ultraperipheral light-by-light proce sses in heavy ion collisions recently observed at the LHC.\nNew method of analytic continuation of GPD for different kinematical regions applied on the photon GPDs and model distributions.\n\nhttps://indico.particle.mephi. ru/event/436/contributions/4309/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4309/ END:VEVENT BEGIN:VEVENT SUMMARY:Hypothetical Lorentz invariance violation and the muon content of extensive air showers DTSTART;VALUE=DATE-TIME:20241025T090000Z DTEND;VALUE=DATE-TIME:20241025T091500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4308@cern.ch DESCRIPTION:Speakers: Andrey Sharofeev (MSU & INR RAS)\nExtensive air show ers (EAS)\, produced by cosmic rays in the atmosphere\, serve as probes of particle interactions\, providing access to energies and kinematical regi mes beyond the reach of laboratory experiments. Measurements from multiple cosmic-ray detectors indicate a significant\, yet unexplained\, discrepan cy between the observed muon content in EAS and that predicted by state-of -the-art interaction models\, suggesting a need for refinements in our und erstanding of fundamental physics. Here we show that a tiny\, experimental ly allowed\, violation of the Lorentz invariance may result in the suppres sion of the number of electrons in EAS\, leaving the muon number intact an d explaining both the ''muon excess'' and its energy dependence. Future ex perimental tests of this scenario are outlined.\n\nhttps://indico.particle .mephi.ru/event/436/contributions/4308/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4308/ END:VEVENT BEGIN:VEVENT SUMMARY:Production of leptonic bound states in electron – positron annih ilation DTSTART;VALUE=DATE-TIME:20241024T081500Z DTEND;VALUE=DATE-TIME:20241024T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4300@cern.ch DESCRIPTION:Speakers: Fedor Martynenko (Samara University)\nThe cross sect ions for the production of single and paired dileptons in electron-positro n annihilation are calculated within the framework of quantum electrodynam ics. Both one-photon and two-photon mechanisms of electron-positron annihi lation with subsequent production of leptons are considered. The formation of both singlet and triplet states of dimuonium and ditauonium is studied . The production cross sections are constructed taking into account relati vistic corrections in the production amplitude and the wave function of th e bound state\, as well as the binding energy of leptons in the bound stat e.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4300/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4300/ END:VEVENT BEGIN:VEVENT SUMMARY:New splitting functions for inelastic bremsstrahlung from Pauli el ectromagnetic form factor DTSTART;VALUE=DATE-TIME:20241024T080000Z DTEND;VALUE=DATE-TIME:20241024T081500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4299@cern.ch DESCRIPTION:Speakers: Ekaterina Kriukova (INR RAS)\nWe revisit the product ion of vector portal mediators\, dark photons with masses 0.4-1.8 GeV\, vi a inelastic proton bremsstrahlung. For the first time\, we add the contrib ution associated with the Pauli electromagnetic proton form factor and obt ain new splitting functions according to the factorization procedure origi nally proposed by Altarelli and Parisi. We also demonstrate the significan ce of the found corrections numerically and update sensitivity estimates f or the T2K\, DUNE\, and SHiP experiments. The talk is based on arXiv prepr ints 2409.11089\, 2409.11386.\n\nhttps://indico.particle.mephi.ru/event/43 6/contributions/4299/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4299/ END:VEVENT BEGIN:VEVENT SUMMARY:Dynamical $O(4)$-symmetry in the light meson spectrum within the f ramework of the Regge approach DTSTART;VALUE=DATE-TIME:20241024T064500Z DTEND;VALUE=DATE-TIME:20241024T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4305@cern.ch DESCRIPTION:Speakers: Alisa Tsymbal (Saint Petersburg State University)\nL ight mesons tend to cluster near certain values of mass. It is interesting to notice that such a degeneracy can be described using dynamical $O(4)$- symmetry\, like in the hydrogen atom. The meson mass spectrum can be well approximated by linear Regge trajectories of the kind $M^2=a l+b n_r+c$\, where $l$ and $n_r$ are angular momentum and radial quantum number\, and $ a$\, $b$\, $c$ are coefficients. Such a spectrum arises naturally within t he hadron string models. Using 2024 data from the Particle Data Group\, a fit for $M^2(l\,n_r)$ was performed. Our analysis seems to confirm that $ a\\approx b$ in the light non-strange mesons\, i.e.\, their masses depend on the sum $l+n_r$ as prescribed by the hydrogen-like $O(4)$-symmetry. Usi ng the semiclassical approximation\, we discuss which kind of hadron strin g models are more favored by the experimental data.\n\nhttps://indico.part icle.mephi.ru/event/436/contributions/4305/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4305/ END:VEVENT BEGIN:VEVENT SUMMARY:Triply heavy tetraquark spectroscopy DTSTART;VALUE=DATE-TIME:20241024T071500Z DTEND;VALUE=DATE-TIME:20241024T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4303@cern.ch DESCRIPTION:Speakers: Elena Savchenko (Federal Research Center "Computer S cience and Control"\, Russian Academy of Sciences\; Faculty of Physics\, L omonosov Moscow State University)\nMasses of the triply heavy tetraquarks of all flavor compositions are calculated within the relativistic quark mo del\, based on the quasipotential approach and QCD. Tetraquark is treated as a bound state of the nonobservable non-pointlike diquark and antidiquar k. The relativistic quasipotential equation takes into account all relativ istic corrections (both spin--dependent and spin--independent) and the int ernal structure of the diquarks via the insertion of calculated diquark--g luon form-factors. The calculated masses of tetraquarks are compared with the strong fall--apart decay thresholds into pair of heavy and heavy--ligh t mesons. The states that lie slightly above or under such thresholds and thus could be observed as narrow resonances in other decay modes are deter mined.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4303/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4303/ END:VEVENT BEGIN:VEVENT SUMMARY:Gravitational axial anomaly\, cosmological constant and Unruh effe ct in curved spacetime DTSTART;VALUE=DATE-TIME:20241024T070000Z DTEND;VALUE=DATE-TIME:20241024T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4304@cern.ch DESCRIPTION:Speakers: Roman Khakimov (BLTP JINR)\nIn my talk I will review the hydrodynamical approach to the description of the gravitational chira l anomaly in spacetimes with a non-trivial Ricci tensor proportional to th e cosmological constant (so-called Einstein manifolds) and discuss an alte rnative derivation of the Unruh effect in curved spacetime as a non-trivia l consequence of the hydrodynamical description of the axial current.\n\nh ttps://indico.particle.mephi.ru/event/436/contributions/4304/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4304/ END:VEVENT BEGIN:VEVENT SUMMARY:Duality of gravity and hydrodynamics: quantum anomalies DTSTART;VALUE=DATE-TIME:20241024T073000Z DTEND;VALUE=DATE-TIME:20241024T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4302@cern.ch DESCRIPTION:Speakers: Georgy Prokhorov (JINR BLTP)\nWe show that there is a relationship between hydrodynamic effects in flat space and effects in a gravitational field. Moreover\, this connection is valid at the quantum l evel in the case of quantum anomalies. In particular\, we find in an accel erated and vortical medium a transport effect directly related to the grav itational chiral anomaly. The general theorem about this relationship is e xplicitly verified by comparing two independent calculations\, quantum-fie ld for the anomaly\, and quantum-statistical for the transport coefficient s\, for the case of massless fields with spins 1/2 and 3/2.\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4302/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4302/ END:VEVENT BEGIN:VEVENT SUMMARY:Extended Vector Meson Dominance Model for Electromagnetic Nucleon Form Factors DTSTART;VALUE=DATE-TIME:20241024T074500Z DTEND;VALUE=DATE-TIME:20241024T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4301@cern.ch DESCRIPTION:Speakers: Nikita Levashko ()\nA detailed analysis of the elect romagnetic form factors of nucleons could help in studying weak interactio ns with neutrinos due to the coincidence of the vector parts of the electr omagnetic and weak currents. There are several theoretical approaches to s tudy these form factors. In this talk the model of extended vector meson d ominance with families of $\\rho$ and $\\omega$ mesons with their radial e xcitations is discussed. The nucleon electromagnetic form factors in space - and time-like regions are studied taking into account new experimental d ata. A detailed description of the behavior of form factors\, as well as t he values ​​of the electric and magnetic radii of the nucleon and the Zemach radii are obtained. The model discussed is an upgrade of the model [1].\n\n[1] B. V. Martemyanov\, Amand Faessler\, and M. I. Krivoruchenko " Electromagnetic form factors of nucleons in the extended vector meson domi nance model"\, Phys. Rev. C 82\, 038201 (2010).\n\nhttps://indico.particle .mephi.ru/event/436/contributions/4301/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4301/ END:VEVENT BEGIN:VEVENT SUMMARY:First measurements of 239Pu fission fraction and long term reactor power monitoring using antineutrino spectrum DTSTART;VALUE=DATE-TIME:20241023T081500Z DTEND;VALUE=DATE-TIME:20241023T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4298@cern.ch DESCRIPTION:Speakers: Nataliya Skrobova ()\, Eduard Samigullin ()\nThe hig hly segmented DANSS anti-neutrino scintillation detector is located at the Kalinin NPP and collects up to 5000 antineutrino events per day. The reac tor power was measured using the inverse beta-decay (IBD) event rate durin g 7.5 years with an accuracy of 1.3% in 3 days and with the relative syste matic uncertainty of less than 0.8%. The report will present the measured dependence of the antineutrino spectrum on the composition of reactor fuel . The measured ratio of cross-sections 235U/239Pu will be presented. The 2 39Pu fission fraction was measured during 7 years of the reactor operation using a fit of the measured IBD positron spectrum with model predictions for different isotopes. Taking into account the absolute antineutrino coun ting rates\, the parameters of a hypothetical sterile neutrino region was extended above $\\Delta m^2$ > 5 eV$^2$\, where there are indications of the existence of a sterile neutrino in the BEST and Neutrino-4 experiments \n\nhttps://indico.particle.mephi.ru/event/436/contributions/4298/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4298/ END:VEVENT BEGIN:VEVENT SUMMARY:Electromagnetic properties of neutrinos DTSTART;VALUE=DATE-TIME:20241025T144500Z DTEND;VALUE=DATE-TIME:20241025T151000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4272@cern.ch DESCRIPTION:Speakers: Alexander Studenikin (Moscow State University)\nWe s tart with an introduction to the theory of neutrino electromagnetic proper ties [1]. Then we consider the most recent experimental constraints on neu trino magnetic µ and electric d moments\, millicharge q\, charge radii r ν2 and anapole aν moments from the terrestrial experiments (the bounds f rom MUNU\, TEXONO\, GEMMA\, Super-Kamiokande\, Borexino\, COHERENT\, XENON 1T\, CONUS and the most recent bounds from XENONnT [2] and LUX-ZEPELIN [3 ]) and also discuss results of the recent studies on possible manifestatio ns of neutrino electromagnetic properties in astrophysics [4-7]. \nThen we focus on the main manifestation of neutrino electromagnetic interactions\ , such as: 1) the radiative decay in vacuum\, in matter and in a magnetic field\, 2) the neutrino Cherenkov radiation\, 3) the plasmon decay to neut rino-antineutrino pair\, 4) the neutrino spin light in matter\, and 5) the neutrino spin and spin-flavour precession are discussed. Phenomenologic al consequences of neutrino electromagnetic interactions (including the sp in light of neutrino) in astrophysical environments are also reviewed. Th e best bounds from laboratory experiments and astrophysical observations o n neutrino electromagnetic properties are confronted with the predictions of theories beyond the Standard Model. \n\n[1] C.Guinti\, A.Studenikin\, N eutrino electromagnetic interactions: A window to new physics\, Rev. Mod. Phys. 87 (2015) 531. \n[2] A.Khan\, Light new physics and neutrino elect romagnetic interactions in XENONnT\, Phys. Lett. B 837 (2023) 137650. \n[3 ] M.Atzori Corona et al.\, New constraint on neutrino magnetic moment from LZ dark matter search results\, Phys. Rev. D 107 (2023) 053001.\n[4] C.G iunti\, K.Kouzakov\, Y.F.Li\, A.Lokhov\, A.Studenikin\, S.Zhou\, Annalen P hys. 528 (2016) 198.\n[5] K.Stankevich\, A.Studenikin\, Neutrino quantum d ecoherence engendered by neutrino radiative decay\, Phys. Rev. D 101 (2020 ) 5\, 056004. \n[6] A.Popov\, A.Studenikin\, Manifestations of nonzero Maj orana CP-violating phases in oscillations of supernova neutrinos\, Phys. R ev. D 103 (2021) 115027. \n[7] S.Jana and Y.Porto\, Resonances of supernov a neutrinos in twisting magnetic fields\, Phys. Rev. Lett. 132 (2024) 1010 05.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4272/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4272/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for two-neutrino double electron capture on Ar-36 with Dark Side-50 detector DTSTART;VALUE=DATE-TIME:20241025T140000Z DTEND;VALUE=DATE-TIME:20241025T141500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4286@cern.ch DESCRIPTION:Speakers: Olga Lychagina (JINR\, MSU)\nTwo-neutrino double ele ctron capture is a rare nuclear decay where two electrons are simultaneous ly captured from the atomic shells and two neutrinos are carried away.\n\n The measurements of the energies of the emitted particles and the half-lif e of the 2EC2$\\nu$ decay to the ground state are of great interest to nuc lear physics. The model predictions for 2EC2$\\nu$ half-life are based on the evaluation of form the main source of NME. The NME calculations are co mplicated and have large uncertainties. Therefore\, if retrieved from expe riment\, half-life values can serve as a test for nuclear theory. In the o ne model framework some constraints on the 2EC0$\\nu$ NME can be derived u sing supposed values of the 2EC2$\\nu$ NME\, so the estimation of 2EC2$\\n u$ half-life could help to study physics beyond the Standard Model.\n\nThi s process is being studied on $^{36}$Ar for the first time. We have perfor med a search for two-neutrino double electron capture in the $KK$ and $KL$ shells of $^{36}$Ar using exposition of about 12 ton-day of data from the DarkSide-50 dark matter detector. As a preliminary result of the analysis \, no significant excess above background was found\, which allowed us to estimate that the half-life limits with CL=90%. We have also evaluated the sensitivity of the DarkSide-20k experiment\, which will become operationa l in the next few years.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4286/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4286/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for processes beyond the Standard Model in the GERDA experi ment DTSTART;VALUE=DATE-TIME:20241025T133000Z DTEND;VALUE=DATE-TIME:20241025T134500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4277@cern.ch DESCRIPTION:Speakers: Anatoly Smolnikov (JINR)\nThe main goal of the GERDA experiment was to search for the neutrinoless double-beta decay of $^{76} $Ge. Beside this\, many other GERDA results of searching for various proce sses beyond the Standard Model were obtained. Among them\, a possible mani festation of the inclusive\, mode independent decays of a single neutron a nd proton and some specific modes of tri-nucleon decays in $^{76}$Ge were investigated\, as well as a possible decay of an electron via channel e$^- $→ ν$_e$ γ. A search for full energy depositions from bosonic keV-scal e dark matter candidates has been performed too. After 127.2 kg yr of tota l exposure\, a limit on the half-life of neutrinoless double-beta decay in $^{76}$Ge is set at $T_{1/2}$ > $1.8\\times 10^{26}$ yr \, which correspo nds to an upper limit on the effective Majorana neutrino mass *m*$_β$$_β $ $1.5\\times 10^{24}$ yr and for protons τ$_p$ > $1.3\\times 10^{24}$ yr at 90% C.I. This is the first limit obtained for $^{76}$Ge. The obtaine d limit on the sum of the decay widths of the four inclusive tri-nucleon d ecays corresponds to a lower lifetime limit of $1.2\\times 10^{26}$ yr. Th is result improves previous limits for tri-nucleon decays by one to three orders of magnitude. For the electron decay e$^-$→ ν$_e$ γ a lower lim it of τ$_e$ > $5.4\\times 10^{25}$ yr has been determined. The limits for the search of bosonic dark matter candidates pose the most stringent dire ct experimental results between 140 and 1021 keV. The brief description of the other results for several non-standard mechanisms of double-beta deca y is also included.\n\nhttps://indico.particle.mephi.ru/event/436/contribu tions/4277/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4277/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino Spin Effects in Gravitational Scattering DTSTART;VALUE=DATE-TIME:20241025T151000Z DTEND;VALUE=DATE-TIME:20241025T152500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4297@cern.ch DESCRIPTION:Speakers: Mridupawan Deka (JINR)\nWe study spin oscillations o f neutrinos scattering off of a rotating black hole surrounded by a thick magnetized accretion disk. Neutrino spin precession is caused by the inter actions of the neutrino magnetic moment with the toroidal and poloidal mag netic fields in the disk. We briefly discuss the findings from our numeric al simulations and their applications for the observations of astrophysica l neutrinos.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 297/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4297/ END:VEVENT BEGIN:VEVENT SUMMARY:Status and Physics Potential of SATURNE DTSTART;VALUE=DATE-TIME:20241025T152500Z DTEND;VALUE=DATE-TIME:20241025T154000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4282@cern.ch DESCRIPTION:Speakers: Konstantin Kouzakov (Lomonosov Moscow State Universi ty)\nThe Sarov tritium neutrino experiment (SATURNE) is part of the scient ific program of the National Center for Physics and Mathematics (NCPM) [1] that was founded in Sarov in 2021. The experiment is under preparation\, with the first taking of data expected for 2025. \nBeing motivated by fund amental problems in neutrino physics\, SATURNE will primarily search for n eutrino electromagnetic interactions [2\,3] in elastic and ionizing neutri no-atom collisions. It will employ a high-intensity tritium neutrino sourc e\, with an initial activity of at least 10 MCi and possibly up to 40 MCi. The tritium source will be used in combination with the He-4\, Si and SrI $_2$(Eu) targets in order to study the elastic and ionization channels of neutrino-atom collisions at unprecedentedly low energies. The Si and SrI$_ 2$(Eu) detectors with record low-energy thresholds for such detector types will measure the ionization channel of neutrino-atom collisions. With the 1-year data from either detector\, one may expect to achieve a sensitivit y on the order of $\\sim10^{-12}\\\,\\mu_B$ at 90% C.L. to the neutrino ma gnetic moment $\\mu_\\nu$\, which is the most studied theoretically and ac tively searched experimentally among the neutrino electromagnetic properti es. The measurements with the liquid He-4 detector in a superfluid state a re expected to provide the first observation of coherent elastic neutrino- atom scattering (CEνAS) [4\,5]. This will bring the experimental studies of coherent elastic neutrino-nucleus scattering (CEνNS) [6] to a qualitat ively new level\, namely when one will be able to explore the neutrino ela stic scattering not only on a nucleus as a whole\, but also on an atom as a whole. With the 5-year data using the liquid He-4 detector\, it is also expected to achieve a record-high $\\mu_\\nu$-sensitivity of $\\sim10^{-13 }\\\,\\mu_B$ at 90% C.L. \n\n**References**\n\n 1. А.А. Yukhimchuk et al .\, FIZMAT **1** (2023) 5 (in Russian)\n 2. C. Giunti and A. Studenikin\, Rev. Mod. Phys. **87** (2015) 531\n 3. A.I. Studenikin and K.A. Kouzakov\, Mosc. Univ. Phys. Bull. **75** (2020) 379\n 4. Yu.V. Gaponov and V.N. Tik honov\, Sov. J. Nucl. Phys. **26** (1977) 314\n 5. M. Cadeddu\, F. Dordei\ , C. Giunti\, K. Kouzakov\, E. Picciau\, and A. Studenikin\, Phys. Rev. D **100** (2019) 073014\n 6. V. Pandey\, Prog. Part. Nucl. Phys. **134** (20 24) 104078\n\nhttps://indico.particle.mephi.ru/event/436/contributions/428 2/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4282/ END:VEVENT BEGIN:VEVENT SUMMARY:Studies of charge-sensor and gas properties of an ion-TPC for $\\m athrm{N\\nu DEx}$ experiment DTSTART;VALUE=DATE-TIME:20241025T141500Z DTEND;VALUE=DATE-TIME:20241025T143000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4276@cern.ch DESCRIPTION:Speakers: Tianyu Liang ()\nThe NvDEx is an experiment searchin g for the neutrinoless double beta decay using ${^{82}SeF_{6}}$ gas\, oper ated in a high-pressure gas TPC. To obtain a high energy resolution\, cust om-designed charge sensors are deployed to directly detect the drifting io ns. In this report\, the measurements of the properties of ${SF_{6}}$ and ${SeF_6}$ gases are presented. The preliminary test results of the perform ance of charge sensors are also discussed.\n\nhttps://indico.particle.meph i.ru/event/436/contributions/4276/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4276/ END:VEVENT BEGIN:VEVENT SUMMARY:Atomic electron shell excitations in neutrinoless double β decay DTSTART;VALUE=DATE-TIME:20241025T143000Z DTEND;VALUE=DATE-TIME:20241025T144500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4266@cern.ch DESCRIPTION:Speakers: Kirill Tyrin (National Research Centre "Kurchatov In stitute")\nThe excitation of electron shell of a daughter atom in a neutri noless double β decay causes change in shape of the total energy peak of β particles at the end of the energy spectrum. This fact has important im plications for modelling the energy spectrum of β particles\, which is se nsitive to the mass and Majorana nature of the neutrino. We report the ove rlap amplitudes between the parent atom and the daughter ion for eleven at oms whose two-neutrino double β decay has been observed experimentally. F or these atoms\, the mean excitation energy and its variance were calculat ed using several methods. We performed Dirac-Hartree-Fock computations bas ed on the GRASP software package. The results were compared with calculati ons performed within the non-relativistic Roothaan-Hartree-Fock model\, as well as with estimates obtained using the Thomas-Fermi and Thomas-Fermi-D irac-Weizsäcker models. In about a quarter of the cases\, when the electr on shell structure is inherited from the parent atom\, a transition to the ground state or the lowest-energy excited state occurs. De-excitation of the daughter ion in the latter scenario is accompanied by the emission of photons in the ultraviolet range\, which can serve as an auxiliary signatu re of double-β decay. \n\nThe results are reported in\n\n[1] M.I. Krivoru chenko\, K.S. Tyrin\, and F.F. Karpeshin\, JETP Lett. 117\, 884 (2023).\n\ n[2] M.I. Krivoruchenko\, K.S. Tyrin\, and F.F. Karpeshin\, JETP Lett. 118 \, 470 (2023).\n\n[3] K. S. Tyrin\, M. I. Krivoruchenko\, arXiv:2408.00068 (2024).\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4266/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4266/ END:VEVENT BEGIN:VEVENT SUMMARY:Status and perspectives of the AMoRE experiment DTSTART;VALUE=DATE-TIME:20241025T134500Z DTEND;VALUE=DATE-TIME:20241025T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4290@cern.ch DESCRIPTION:Speakers: Vaily Kornoukhov (MEPhI)\nAMoRE (Advanced Mo based R are process Experiment) is an experiment to search for neutrinoless double -beta decay of 100Mo using scintillating molybdate crystals with metallic magnetic calorimeters as low temperature sensors. The AMoRE-I\, which is t he first stage of the experiment was completed in April 2023 with the best result of a limit of T0ν1/2 > 3\,0x10+24 years at 90% C.L. AMoRE-II main phase experiment\, using 157 kg of lithium molybdate crystals\, will be i nstalled at the Yemi underground laboratory (Yemilab)\, newly constructed at deeper (1 km overburden) and larger space with an experimental area of 2\,600 m2. The goal of AMoRE-II phase is to get a limit of T0ν1/2 > 6x10+ 26 years at 90% C.L. which corresponds to an effective Majorana neutrino m ass in the range of mββ ≤ (0.013 − 0.025) eV after 5 years of operat ion. The results from AMoRE-I and preparation of the AMoRE-II phase will b e presented.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 290/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4290/ END:VEVENT BEGIN:VEVENT SUMMARY:The DANSS Collaboration: recent results and perspectives DTSTART;VALUE=DATE-TIME:20241023T152000Z DTEND;VALUE=DATE-TIME:20241023T153500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4296@cern.ch DESCRIPTION:Speakers: Igor Alekseev (KCTEP\, NRC KI)\nThe DANSS experiment at Kalininskaya NPP is running for already 8 years \nsince April 2016. Mo re than 8 million inverse beta decay events are already collected. DANSS e xperimental program includes both search for physics beyond the Standard M odel\, like sterile neutrinos or large extra dimensions\, and applied stud ies connected to reactor monitoring using electron antineutrino flux. The model independent exclusion area in the sterile neutrino parameter space f or 3+1 hypothesis extends till $sin^2(2 \\theta) = 0.004$ for $\\Delta m^2 = 0.9$ eV$^2$\, where sensitivity of the experiment is the best. Our data show presence of the antineutrino with energies above 10 MeV with signifi cance 6.8 $\\sigma$. Independent from the NPP standard equipment reactor p ower measurements during 7+ years demonstrated excellent stability with un certainty 1.3% for a three days measurement. \n\n Along with ongoing sta tistics collection DANSS is preparing for an upgrade\, which shell signifi cantly improve energy resolution and also increase the fiducial volume. Th e talk covers recent analysis results\nand the upgrade status.\n\nhttps:// indico.particle.mephi.ru/event/436/contributions/4296/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4296/ END:VEVENT BEGIN:VEVENT SUMMARY:Antineutrino measurements with the iDREAM detector at Kalinin NPP. DTSTART;VALUE=DATE-TIME:20241023T153500Z DTEND;VALUE=DATE-TIME:20241023T155000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4273@cern.ch DESCRIPTION:Speakers: Aldiyar Oralbaev (Kurchatov institute)\nThe iDream ( industrial Detector of REactor Antineutrino for Monitoring) project is aim ed at development of the reactor antineutrino detection technology for an industrial tool creation. The tool can serve for an additional independen t control method of a nuclear reactor operation. The 1 ton Gd doped liquid scintillator neutrino detector is placed under the 3rd energy unit of the Kalinin NPP. We are going to present the results of the detector probatio n during one full fuel cycle\, which duration is equal to 510 effective da ys.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4273/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4273/ END:VEVENT BEGIN:VEVENT SUMMARY:Latest results from Daya Bay experiment based on full dataset DTSTART;VALUE=DATE-TIME:20241023T150500Z DTEND;VALUE=DATE-TIME:20241023T152000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4289@cern.ch DESCRIPTION:Speakers: Vitalii Zavadskyi (Joint Institute for Nuclear Resea rch)\non behalf of Daya Bay Collaboration\n\n The Daya Bay experiment was planned to precisely measure the neutrino oscillation parameters $\\sin^2 2\\theta_{13}$ and $\\Delta m^2_{32}$. The antineutrino flux from six nuc lear reactors was measured by eight identically designed liquid scintillat or detectors at distances from 400 m to 2 km. Four detectors were located in the two near halls and four detectors were located in the far hall. The experiment has accumulated $5.55 \\times 10^6$ candidates of the interact ion of electron antineutrinos during 10 years of operation. The oscillatio n parameters are measured with unprecedented precision: $\\sin^2 2\\theta_ {13} = 0.0851 \\pm 0.0024$\, $\\Delta m^2_{32} = (2.466 ± 0.060) \\times 10^{−3}$ eV$^2$ assuming the normal mass ordering and $\\Delta m^2_{32} = −(2.571 \\pm 0.060) × 10^{−3}$ eV$^2$ assuming the inverted mass or dering.\n\n Results of oscillation analysis based on a full dataset will be presented. Additionally\, results of the search of sterile neutrinos ar e included as well.\n\nhttps://indico.particle.mephi.ru/event/436/contribu tions/4289/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4289/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the νGeN neutrino experiment at Kalinin NPP DTSTART;VALUE=DATE-TIME:20241023T145000Z DTEND;VALUE=DATE-TIME:20241023T150500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4275@cern.ch DESCRIPTION:Speakers: Alexey Konovalov (MEPhI/ITEP)\nThe νGeN experimenta l setup is deployed at Kalinin Nuclear Power Plant at a distance of 11 m f rom the center of the Unit 3 core. The experiment aims for observation of coherent elastic scattering of reactor antineutrinos off nuclei (CEvNS) an d performs a search of antineutrino magnetic moment (NMM) using a 1.4 kg H PGe detector. Based on the dataset acquired from September 2022 to May 202 3 we report a 90% C.L. upper limit on CEvNS cross-section of 5.0/2.0 times larger than the Standard model prediction depending on the assumption of nuclear recoil quenching factor. The 90% C.L. sensitivity of νGeN to NMM evaluated for the same dataset is $5.3\\cdot10^{−11} \\mu_{B}$\, while t he increase of exposition to 1100 kg$\\cdot$days together with application of a background model allows to reach an upper limit of $2.6\\cdot10^{− 11} \\mu_B$.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 275/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4275/ END:VEVENT BEGIN:VEVENT SUMMARY:The COHERENT experiment DTSTART;VALUE=DATE-TIME:20241023T142000Z DTEND;VALUE=DATE-TIME:20241023T143500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4260@cern.ch DESCRIPTION:Speakers: Alexander Kumpan (National Research Nuclear Universi ty MEPhI)\nCoherent elastic neutrino nucleus scattering (CEvNS) is a funda mental process within the Standard Model which was observed for the first time in 2017 by the COHERENT experiment on the CsI target at the Spallatio n Neutron Source (SNS) located in Oak Ridge National Laboratory (USA). Thi s process cross section prevails over the cross sections of all other know n neutrino interactions with heavy nuclei within the energy range below 50 MeV due to its dependence on square number of neutrons in the nucleus. Th e main goal of COHERENT is to measure CEvNS on different targets and to ex plore related physics opportunities in the neutrino and BSM physics. After the first observation COHERENT has also succeeded in detection of CEvNS o n Ar and Ge targets with the latter in 2023.\n\nIn this talk we describe t he current status of CEvNS study in the COHERENT experiment and talk about efforts to measure inelastic neutrino interactions with Ar\, I\, O\, Pb a nd Th nuclei. We update our program for neutrino flux measurements at SNS with heavy water detectors. We also present other COHERENT efforts and the search for sterile neutrinos at the Second Target Station of SNS.\n\nhttp s://indico.particle.mephi.ru/event/436/contributions/4260/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4260/ END:VEVENT BEGIN:VEVENT SUMMARY:Experimental study of CEvNS DTSTART;VALUE=DATE-TIME:20241023T140000Z DTEND;VALUE=DATE-TIME:20241023T142000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4257@cern.ch DESCRIPTION:Speakers: Dmitry Akimov (MEPhI)\nA review of worldwide experim ental study of coherent elastic neutrino-nucleus scattering (CEvNS) is giv en.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4257/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4257/ END:VEVENT BEGIN:VEVENT SUMMARY:RED-100 at the Kalinin Nuclear Power Plant: first results and plan s DTSTART;VALUE=DATE-TIME:20241023T143500Z DTEND;VALUE=DATE-TIME:20241023T145000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4291@cern.ch DESCRIPTION:Speakers: Olga Razuvaeva ()\, Olga Razuvaeva (MEPhI)\nRED-100 is a two-phase emission detector with an active volume containing 130 kg o f liquid xenon. The detector was exposed to the antineutrino flux of $1.35 ·10^{13}$ $cm^{−2}s^{−1}$ at a distance of 19 m from the 3.1 GW react or core of Unit 4 of the Kalinin Nuclear Power Plant (KNPP) . The comparis on of count rates measured during the reactor on and off periods shows no statistically significant excess and allows to obtain an upper limit on th e cross-section of coherent elastic scattering of antineutrinos on xenon n uclei.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4291/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4291/ END:VEVENT BEGIN:VEVENT SUMMARY:Low-background technique and physics at BNO DTSTART;VALUE=DATE-TIME:20241023T074000Z DTEND;VALUE=DATE-TIME:20241023T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4294@cern.ch DESCRIPTION:Speakers: Vladimir Kazalov (BNO INR RAS)\nLow-background techn ique and physics at BNO\n\nhttps://indico.particle.mephi.ru/event/436/cont ributions/4294/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4294/ END:VEVENT BEGIN:VEVENT SUMMARY:Preliminary results of the new precision measurements of 71Ge life time purposed for a solution of "gallium anomaly" problem. DTSTART;VALUE=DATE-TIME:20241023T080000Z DTEND;VALUE=DATE-TIME:20241023T081500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4283@cern.ch DESCRIPTION:Speakers: Maxim Trushin (PNPI)\nThe possibility of active neut rinos oscillation into the sterile neutrinos is one of the most discussed topics of neutrino physics nowadays. Experimental evidences favoring for t he oscillations were obtained from radiochemical gallium-germanium (Ga-Ge) experiments SAGE\, GALLEX/GNO and BEST. Especially the latest data from B EST experiment have revealed convincingly\, at the level of 5σ\, a 20% de ficit of the neutrinos detected from an artificial neutrino source – the effect called as “gallium anomaly". \n This deficit of the neutrinos wa s established\, in particular\, by taking into the calculations the half-l ife value of 71Ge radionuclide. Meanwhile\, the half-life value of 71Ge\, which is considered to be relevant at present days (T1/2=11.43 days)\, wa s obtained in 1985 and this value diverges significantly (up to ~10σ) fro m the results of earlier measurements performed in 1950s. By application i n the calculations the somewhat greater 71Ge half-life value than the acce pted one\, the gallium anomaly can be eliminated or its statistical reliab ility can be significantly reduced.\n The aim of the presented work is to verify the validity of 71Ge half-life value determined previously. The 71G e isotope was obtained by the irradiation of natural germanium wafer in th e neutron beam of PNPI accelerator. Spectra of 71Ge were measured with sev eral Si and Ge detectors during with the exposure periode over six months. More details about the measurement procedure and the obtained experimenta l results will be presented at the Conference.\n\nhttps://indico.particle. mephi.ru/event/436/contributions/4283/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4283/ END:VEVENT BEGIN:VEVENT SUMMARY:Commissioning of 3D-segmented neutrino detector SuperFGD in the T2 K neutrino beam DTSTART;VALUE=DATE-TIME:20241023T071000Z DTEND;VALUE=DATE-TIME:20241023T072500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4281@cern.ch DESCRIPTION:Speakers: Angelina Chvirova (INR RAS)\nThe long baseline neutr ino oscillation experiment T2K [1] is aiming at searching for CP violation in the neutrino sector and precision measurements of neutrino oscillation parameters. T2K has obtained results indicating CP violation with more than 90% confidence level [2]. In the T2K experiment\, the neutrino beam g enerated at J-PARC is measured at the near detector ND280 located 280m dow nstream from the proton target. The ND280 was recently upgraded to reduce systematic errors and improve measurement of the neutrino beam before osci llations. A new scintillation tracker Super Fine-Grained Detector (SuperFG D) consists of about 2 million scintillator cubes\, each of 1 cm3 [3]. The signal from each cube is read out by three orthogonal WLS fibers and dete cted by micropixel photosensors MPPC. The detector has a high light yield for charged particles\, a good time resolution and a low detection thresho ld. SuperFGD is a more efficient neutrino detector which selects high angl e and low momentum particles\, accumulate larger sample of neutrino intera ctions\, and detect neutrons. SuperFGD was installed in the ND280 pit at J -PARC in October 2023\, and started full data taking in June 2024. The cal ibration of SuperFGD readout channels using LED system and cosmic muons wi ll be presented. Detection of muon neutrinos in SuperFGD through charged current in the T2K neutrino beam will be presented and discussed. The emph asis will be put of reconstruction of muons and stopped protons in SuperFG D.\n\nSupported by the RSF grant # 24-12-00271\n\n[1] K.Abe et al. The T2K Experiment\, Nucl. Instrum. Meth. A659 (2011) 106–135.\n\n[2] K.Abe et al. Constraint on the matter–antimatter symmetry-violating phase in neut rino oscillations\, Nature 580 (2020) 7803\, 339-344.\n\n[3] A.Blondel et al. A fully active fine-grained detector with three readout views\, JINST 13 (2018) 02\, P02006.\n\nhttps://indico.particle.mephi.ru/event/436/cont ributions/4281/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4281/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for heavy neutrinos using T2K near detector ND280 DTSTART;VALUE=DATE-TIME:20241023T065500Z DTEND;VALUE=DATE-TIME:20241023T071000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4278@cern.ch DESCRIPTION:Speakers: Konstantin Gorshanov (The Institute for Nuclear Rese arch of the RAS)\nThe analysis presented in this work aims at the study of heavy neutrinos (N) with masses $\n\nhttps://indico.particle.mephi.ru/eve nt/436/contributions/4278/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4278/ END:VEVENT BEGIN:VEVENT SUMMARY:Calculation of the sensitivity of the CP-violation phase measureme nt in the lepton sector in the P2O experiment DTSTART;VALUE=DATE-TIME:20241023T072500Z DTEND;VALUE=DATE-TIME:20241023T074000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4268@cern.ch DESCRIPTION:Speakers: Anatoly Sokolov (National Research Centre "Kurchatov Institute" – IHEP)\nIn the P2O (Protvino-to-ORCA) experiment\, it is pl anned to direct a neutrino beam from the U-70 proton accelerator (Protvino \, Russia) to the Mediterranean Sea to detect neutrinos with the deep-sea ORCA detector created near the French coast. The purpose of these experime nts is to determine the neutrino mass hierarchy and search for CP-violatio n in the lepton sector. Various options of the construction of the corresp onding neutrino channel at the U-70 accelerator were considered earlier. \ nIn this report different types of uncertainties in the experiment and the contribution of each of them to the CP-violation phase measurement error are studied. This will help to understand their importance and make possib le in future to develop the optimal design of the planned long-baseline ex periments (the type and characteristics of the beam\, detectors\, necessar y integral luminosity). We also calculated the sensitivity of the P2O expe riment in the measurement of the CP-violation phase in the lepton sector f or the previously considered neutrino beams. The choice of the optimal var iant of the neutrino beam ensuring the maximal sensitivity of the P2O expe riment is carried out.\n\nhttps://indico.particle.mephi.ru/event/436/contr ibutions/4268/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4268/ END:VEVENT BEGIN:VEVENT SUMMARY:Status and future prospects of combining the results of three-flav our neutrino oscillation experiments DTSTART;VALUE=DATE-TIME:20241023T061500Z DTEND;VALUE=DATE-TIME:20241023T064000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4267@cern.ch DESCRIPTION:Speakers: Liudmila Kolupaeva (JINR)\nNeutrino oscillations hav e been actively studied for the last few decades. At the moment\, the unkn own parameters of the theory are the neutrino mass ordering and the phase of CP violation in the lepton sector. One of the ways to increase the sens itivity to these parameters is the combination the results of several expe riments. For many years phenomenologists have been doing such unification with certain approximations taken into account\, so called global fits. Re cently\, experiments themselves started to produce the joint fits. In the past year T2K + SuperK and T2K + NOvA announced their first results.\nIn t his talk status of both joint and global analyses will be discussed as wel l as their future prospects.\n\nhttps://indico.particle.mephi.ru/event/436 /contributions/4267/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4267/ END:VEVENT BEGIN:VEVENT SUMMARY:NOvA recent results of three-flavor oscillation analysis DTSTART;VALUE=DATE-TIME:20241023T064000Z DTEND;VALUE=DATE-TIME:20241023T065500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4270@cern.ch DESCRIPTION:Speakers: Anastasiia Kalitkina (Joint Institute for Nuclear Re search)\nThe NOvA experiment is a long-baseline neutrino experiment design ed to study the oscillation behavior of neutrinos and antineutrinos utiliz ing Fermilab’s Megawatt-capable NuMI neutrino beam. NOvA has been collec ting data for 10 years from two functionally identical tracking calorimete r detectors\, which are situated off the NuMI beam axis and separated by 8 10 km. The experiment’s construction allows us to observe muon (anti)neu trino disappearance and electron (anti)neutrino appearance. Therefore\, we can obtain precision measurements of oscillation parameters\, such as the mass splitting $\\Delta m^{2}_{32}$​ and the mixing angle $\\theta_{23} $​\, as well as get closer to understanding the matter-antimatter asymme try in the universe. In this talk\, an overview of the NOvA experiment and its latest results will be presented.\n\nhttps://indico.particle.mephi.ru /event/436/contributions/4270/ LOCATION: Petrovskiy 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4270/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent Belle II results DTSTART;VALUE=DATE-TIME:20241024T093000Z DTEND;VALUE=DATE-TIME:20241024T100000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4255@cern.ch DESCRIPTION:Speakers: Pavel Pakhlov (HSE)\nThe Belle II experiment at the SuperKEKB electron-positron asymmetric energy collider is a substantial up grade of the Belle experiment\, which has been running at KEK for over a d ecade. For now\, Belle II recorded 424\\fb of data aiming for an unprecede nted sample of 50\\ab\, a factor of 50 more than its predecessor. With thi s data set\, Belle II will be able to explore flavor physics with B and D mesons\, and τ leptons and search for new physics with unmatched precisio n. We discuss selected recent results from the Belle II experiment.\n\nhtt ps://indico.particle.mephi.ru/event/436/contributions/4255/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4255/ END:VEVENT BEGIN:VEVENT SUMMARY:Development and tests of the 100 ps FPGA-based TDC readout board f or high granular time-of-flight neutron detector at BM@N experiment. DTSTART;VALUE=DATE-TIME:20241025T154500Z DTEND;VALUE=DATE-TIME:20241025T155500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4247@cern.ch DESCRIPTION:Speakers: Dmitry Finogeev ()\nThe new high granular time-of-fl ight neutron detector (HGND) is being developed for the BM@N (Baryonic Mat ter at Nuclotron) experiment to identify neutrons and to measure their ene rgies in heavy-ion collisions at ion beam energies up to 4 AGeV. The HGND consists of about 2000 scintillator detectors (cells) with a size of $40\\ times40\\times25\\ \\text{mm}^3$ and with individual light readout with EQ R15 11-6060D-S photodetectors.\nThe readout board with a 100 ps FPGA-based TDC (Time to Digital Converter) is currently under development. The HGND will consist of eight such readout boards\, each comprising three Kintex 7 FPGAs for reading out 252 channels. The TDC operates on the standard LVDS 4x asynchronous oversampling and is synchronized with the experiment time stamp using the White Rabbit link.\nThe full functional readout board prot otype operating with 39 TDC channels was assembled and is under testing. T he measurements show channel precision on the level of 40 ps.\nThe FPGA-TD C principle of operation and tests results\, readout board topology\, and the readout software architecture will be discussed.\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4247/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4247/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of a full-scale readout for the active scintillator la yers of the HGND detector at the BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T153500Z DTEND;VALUE=DATE-TIME:20241025T154500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4219@cern.ch DESCRIPTION:Speakers: Aleksandr Makhnev (INR of RAS)\nThe BM@N experiment\ , located at the Nuclotron facility in Dubna at the Joint\nInstitute for N uclear Research (JINR)\, is a fixed-target experiment designed to\ninvesti gate heavy ion collisions at beam energies up to 4 A GeV. A novel Highly\n Granular Neutron Detector (HGND) is being designed and constructed for the \nexperiment to measure neutron spectra and yields using time-of flight me thod in\nthe kinetic energy range of 0.5–4 GeV. These observables will b e very important to\nstudy contribution of symmetry energy in the equation of state of dense nuclear\nmatter. The high granularity of this detector is crucial for accurate neutron\nidentification and represents the main de sign challenge of the HGND. The detector\nis constructed as a layered stru cture composed of copper absorbers and readout\nlayers\, each containing a n 11x11 grid of plastic scintillators\, along with a Multi-\nPixel Photon Counter (MPPC) based board and an LED calibration board. Multi-Pixel Photo n Counter (MPPC)-based board and an LED calibration board. This work detai ls the design\, production\, and testing of these boards\, as well as the progress on the mechanical fixtures and support structures required for th e assembly of the detector.\n\nhttps://indico.particle.mephi.ru/event/436/ contributions/4219/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4219/ END:VEVENT BEGIN:VEVENT SUMMARY:Calculations of the efficiency of the Highly Granular Neutron Dete ctor prototype in detecting spectator neutrons in the BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T152500Z DTEND;VALUE=DATE-TIME:20241025T153500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4241@cern.ch DESCRIPTION:Speakers: Aleksandr Zubankov (Institute for Nuclear Research o f the Russian Academy of Sciences)\nThe Highly Granular Neutron Detector ( HGND) is now developed and constructed to measure the yields and flow of n eutrons produced in nucleus-nucleus collisions in the BM@N experiment at t he NICA accelerator complex at JINR (Dubna) to study the equation of state of nuclear matter at high baryon densities. The HGHD will be composed of multiple longitudinally alternating absorber and high transverse granulari ty scintillator layers. Each scintillator layer consists of 144 individual scintillator detectors with a time resolution of about 130 ps. The HGND i s designed to measure neutron kinetic energy in the range from 300 MeV to 4 GeV via time-of-flight. A compact HGND prototype has already been design ed and constructed to validate the concept of the full-scale HGND. The fir st experimental data on spectator neutron yields have been collected for t he collisions of 3.8A GeV Xe with CsI target by the BM@N experiment at the beginning of 2023.\n\nThis work presents the results of the efficiency an d geometric acceptance simulation of the HGND prototype for the detection of forward spectator neutrons from Xe-CsI collisions using two models to g enerate secondary particles and nuclear fragments. The Dubna Cascade Model coupled with the Statistical Multifragmentation Model (DCM-QGSM-SMM) and the Ultrarelativistic Quantum Molecular Dynamics Model coupled with the Ab rasion Monte Carlo (UrQMD-AMC) were used. The difference in efficiency and geometric acceptance calculated with these models is used to estimate the systematic uncertainties of these quantities.\n\nhttps://indico.particle. mephi.ru/event/436/contributions/4241/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4241/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of neutron reconstruction procedure with the HGND at t he BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T151500Z DTEND;VALUE=DATE-TIME:20241025T152500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4222@cern.ch DESCRIPTION:Speakers: Arseniy Shabanov ()\nBM@N is a fixed target experime nt at the Nuclotron in Dubna\, JINR. It is designed to study heavy ion col lisions at beam energies up to 4 A GeV. Some of the important observables in this experiment are the spectra and the yields of neutrons. The Highly Granular Neutron Detector (HGND) is being developed to address experimenta l difficulties in measuring neutrons with kinetic energies 0.5 - 4 GeV. Hi gh granularity of the detector allows the recognition of neutrons in the p resence of background particles. However\, this task requires the developm ent of advanced algorithms. One of the possible approaches is to combine f ired cells of the detector into clusters\, apply selection criteria to the clusters and then reconstruct the energy of the neutron by its time of fl ight. Such cluster-based algorithm of neutron reconstruction and its perfo rmance will be discussed.\n\nhttps://indico.particle.mephi.ru/event/436/co ntributions/4222/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4222/ END:VEVENT BEGIN:VEVENT SUMMARY:Misalignment influence on the track reconstruction in the MPD TPC DTSTART;VALUE=DATE-TIME:20241025T142500Z DTEND;VALUE=DATE-TIME:20241025T144000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4251@cern.ch DESCRIPTION:Speakers: Valentin Kuzmin (Moscow State University)\nA method of determining the position of the readout sectors of a time projection ch amber using experimental data is proposed. Considering the results of mode ling the response of sensitive elements of the time projection chamber of the multipurpose detector (MPD)\, three types of tracks were reconstructed : cosmic muons\, beams of the laser detector system\, and muons from the i nteraction of nuclei. The accuracy of the MPD TPC alignment finding is inv estigated in MC events with different types of tracks. For the Time Projec tion Camera\, a measure of deviation of the used alignment from the real o ne is introduced. The simulation of track reconstruction shows the systema tic dependence of the reconstructed pT on its value. The systematic shift depends on the track projection width which is a function of the gas and t he electric field in the camera. The developed alignment tools for the MPD TPC allow to estimate its value using experimental data and to introduce the correction in the reconstructed track parameters. The influence of the misalignment on reconstructed track parameters is low\n\nhttps://indico.p article.mephi.ru/event/436/contributions/4251/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4251/ END:VEVENT BEGIN:VEVENT SUMMARY:Evaluating ML-Accelerated Simulations of the Time Projection Chamb er for the MPD Experiment. DTSTART;VALUE=DATE-TIME:20241025T144000Z DTEND;VALUE=DATE-TIME:20241025T145500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4218@cern.ch DESCRIPTION:Speakers: Fares Ghazzawi (HSE University\, Moscow\, Russia)\nC omputer-based simulations of high-energy physics experiments are\ncritical for obtaining more accurate physics results\, yet these simulations\ntend to be computationally expensive. Generative Machine Learning (ML) based \ napproaches offer potential for accelerating the simulation for such exper iments. \nHowever\, a reduction in quality is often anticipated when compa ring these fast ML-based\nsimulations with detailed full simulations. In t his contribution\, we compare a \nML-based simulation to a detailed simula tion of the Time Projection Chamber\n(TPC) for the MPD experiment at the N ICA accelerator complex. We evaluate the \nextent to which high-level char acteristics\, such as the quality of reconstructed tracks\,\ncan and shoul d be reproduced by the ML-based fast simulation.\n\nhttps://indico.particl e.mephi.ru/event/436/contributions/4218/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4218/ END:VEVENT BEGIN:VEVENT SUMMARY:Pointlike events discrimination in the RED-100 experiment using ML algorithms DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4204@cern.ch DESCRIPTION:Speakers: Olga Razuvaeva ()\nRED-100 is a two phase detector w ith Xe as a target material designed to study coherent elastic neutrino nu cleus scattering (CEvNS). In 2021-22 it was exposed at Kalinin NPP (Udomly a\, Russia) 19 meters from the reactor core\, nowadays the modification wi th LAr as working medium is undergoing. This poster is about reducing the specific background component. This type of background comes from spontane ous emission of single electron events (SE). Signals from coincidence of s everal SE signals are very similar to signals from pointlike events. Hence complex discrimination algorithms are required. We carried out a detailed simulation of the SE signals and developed two algorithms based on neural networks in order to solve this problem. Results of simulation and neural networks are shown and discussed.\n\nhttps://indico.particle.mephi.ru/eve nt/436/contributions/4204/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4204/ END:VEVENT BEGIN:VEVENT SUMMARY:The influence of reactor neutrino energy spectra for constraints o n amplitude of coherent elastic neutrino-nucleus scattering DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4280@cern.ch DESCRIPTION:Speakers: Anton Lukyashin (MEPhI/RTU)\nThis report shows how t he current models of reactor antineutrino energy spectra affect the estima tes of the count rate for coherent elastic neutrino-nucleus scattering (CE $\\nu$NS) in the RED-100 experiment. The reactor antineutrino spectrum con sists of contribution from 4 main (parent) isotopes $^{235}U$\, $^{238}U$\ , $^{239}Pu$\, $^{241}Pu$\, taken with partial coefficients on the burn-up moment. We analyze and compare the spectra-averaged differential cross-se ction for each model and compared the resulting CE$\\nu$NS count rate in R ED-100 at a distance of $\\sim$19 meters from reactor core at the Kalinin nuclear power plant (KNPP). The calculations performed show the difference between count rate estimations for each model and the corresponding const raints on CE$\\nu$NS cross-section amplitude. It is shown that the reactor high energy antineutrinos make a significant contribution to the predicti on value.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4280 / LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4280/ END:VEVENT BEGIN:VEVENT SUMMARY:Parameterization of SiPM signals of MPD/ECal DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4201@cern.ch DESCRIPTION:Speakers: Павел Бахтин (NRC KI\, NRNU MEPhI)\nThe M PD detector at the NICA facility is under construction. One of the key\nsu bsystems of the MPD experiment is electromagnetic calorimeter ECal.\nModul es of the ECal undergo calibration using cosmic muons now. These data\nwer e used for parameterization of the digitized SiPM signals after low pass\n filter at an input of ADC. Few models of SiPM signals were tried and the\n best one was found. The validity of the parameterization was tested over a \nwide range of signal amplitudes. The parameterization has been used to\n estimate time resolution for signals from adjacent towers. Few methods: lo w\nthreshold\, constant fraction and zero crossing have been compared.\n\n https://indico.particle.mephi.ru/event/436/contributions/4201/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4201/ END:VEVENT BEGIN:VEVENT SUMMARY:Spatial-sensetive detector based on strong scattering scintillator medium DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4195@cern.ch DESCRIPTION:Speakers: Artemiy Krapiva (LPI)\nThe opaque scintillator detec tor is a novel concept for a new generation of position-sensitive detector s. The main idea is to localize the light near the point of its scintillat ion via the scattering medium. The first and only published results by the LiquidO collaboration are based on the usage of an opaque liquid scintill ator.\nOur approach suggests the usage of media based on solid granular or ganic scintillator and an array of WLS fibers with SiPMs as photodetectors . The report describes the new results obtained during the beam test of di fferent configurations of scintillating and scattering media with external proportional chambers as a tracking system. The results of media comparis on and estimation of track reconstruction accuracy are presented.\n\nhttps ://indico.particle.mephi.ru/event/436/contributions/4195/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4195/ END:VEVENT BEGIN:VEVENT SUMMARY:Protection Against High-Energy Particles for X-ray Telescopes DTSTART;VALUE=DATE-TIME:20241022T140500Z DTEND;VALUE=DATE-TIME:20241022T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4194@cern.ch DESCRIPTION:Speakers: Oleg Sadovskiy (Mephi\, Space Research Institute)\nW hen designing X-ray telescopes\, it is essential to consider interference that may occur on the detectors. For instance\, in many current telescopes \, such as eROSITA from the Spectrum-Roentgen-Gamma (SRG) project\, a syst em of magnets is positioned after the mirror assembly\, which focuses part icles. This magnet system is designed to deflect electrons and protons. It can deflect protons with energies up to tenths of MeV\, which helps elimi nate noise and extend the effective lifetime of the detector. Additionally \, to protect against high-energy particles\, the camera itself is surroun ded by a three-centimeter copper layer\, preventing residual noise from pe netrating the system.\nA similar task was set for a new telescope with par ameters comparable to those of eROSITA\, for which a model of the magnetic field was constructed and calculated\, allowing the detectors to be shiel ded from unwanted influences.\n\nhttps://indico.particle.mephi.ru/event/43 6/contributions/4194/ LOCATION: Alexeevskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4194/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino production in the central dark-matter spikes of active ga laxies DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4417@cern.ch DESCRIPTION:Speakers: Polina Kivokurtseva (MSU\,IRN)\nRecent multi-messeng er observations suggest that high-energy neutrinos may be produced close t o central black holes in active galaxies. These regions may host dark-matt er (DM) spikes\, where the concentration of DM particles is very high. Her e we explore the contribution of the DM annihilation to the target photons for the neutrino production\, proton-photon interactions\, estimate the a ssociated neutrino spectrum and figure out possible future tests of this s cenario.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4417/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4417/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of dp backward elastic scattering at GeV-energies DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4409@cern.ch DESCRIPTION:Speakers: Nadezhda Ladygina (JINR)\nThe deuteron-proton elasti c scattering process is considered in the relativistic\nexpansion framewor k. Four reaction mechanisms are taken into account: one-nucleon exchange\, \nsingle-scattering\, double-scattering terms\, and term with delta-isoba r in the intermediate state.\nEach of these mechanisms contributes into th e reaction amplitude. The calculations for the\ndifferential cross sectio n and a number of polarization observables are performed in a GeV-energy r ange for the special case when the scattering angle is equal to 180 degree s in the center of mass.\nThe results are given for various deuteron wave functions: Paris\, CD Bonn\, and Gross.\n\nhttps://indico.particle.mephi.r u/event/436/contributions/4409/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4409/ END:VEVENT BEGIN:VEVENT SUMMARY:Data driven background estimation in Baksan Underground Scintillat ion Telescope DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4269@cern.ch DESCRIPTION:Speakers: Makhti Kochkarov (BNO INR RAS)\, Vladimir Kazalov (I NR RAS)\nThe main reaction used to detect Core-collapse Supernova neutrino s in physical experiments is the inverse beta decay reaction. Positrons pr oduced in the reaction pass through a scintillator only a few centimeters thick. For the Baksan Underground Scintillation Telescope (BUST) detector\ , which has a modular structure\, the inverse beta decay reaction appears as a single trigger of an individual counter. The problem of detecting the reaction from neutrinos in the counter is due to a large background of si ngle events with different natures. The main sources of background single events include:\n- single muons penetrating through the detector's shieldi ng\;\n- high-energy neutrons producing unstable isotopes in the detector's scintillator\;\n- neutrons participating in elastic collisions with targe t protons\;\n- unstable isotopes created in cascades through the inelastic interaction of muons with the detector's materials\;\n- local radioactivi ty\;\n- random counter triggers.\nThis work discusses the methodologies fo r evaluating each of the background components currently used in processin g the experimental data of the BUST detector.\n\nhttps://indico.particle.m ephi.ru/event/436/contributions/4269/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4269/ END:VEVENT BEGIN:VEVENT SUMMARY:Autonomous instrument system for monitoring radioactivity\, underg round gases and environmental parameters underground DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4248@cern.ch DESCRIPTION:Speakers: Natalia Agafonova (INR RAS)\nFor experiments on sear ching for rare underground events\, such as detection of solar neutrinos\, neutrinos from supernovae\, neutrinoless beta decay\, the main problem is the background variation. Regardless of the detector power supply\, two t ypes of backgrounds can be specified: muons and natural radioactivity of c onstruction materials\, rock\, as well as a variable component of radioact ivity - underground gases. Emissions of radioactive gases can be a consequ ence of both impending earthquakes and changes in local humidity and press ure. We have created an autonomous station capable of monitoring environme ntal parameters such as temperature\, humidity\, pressure\, CO2 concentrat ion\, radon\, density of positive and negative air ions\, and measuring vi bration levels in different frequency ranges. The universal complex displa ys all parameters online on the monitor screen and saves them to a file fo r further processing. A diagram of the developed complex and the limits of the measured parameters are presented. The measurement results for the un derground room of the experimental hall of 40 $\\text{m}^3$ at a depth of 10 m are given.\n\nhttps://indico.particle.mephi.ru/event/436/contribution s/4248/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4248/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of a project for a universal trap for storing ultracol d neutrons DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4239@cern.ch DESCRIPTION:Speakers: Alexey Fomin (NRC "Kurchatov Institute" - PNPI)\nThe project assumes that in one installation two traps are installed on the s ame axis: material and magnetic. By rotating the trap system around an axi s\, it is possible to carry out gravitational capture of UCNs either into a material or into a magnetic trap. Thus\, on one installation it is possi ble to compare the material and magnetic storage of UCNs under the same co nditions. It is also important to note that these two measurement methods differ methodically: in a material trap\, the neutron lifetime is obtained as a result of extrapolation\, while in a magnetic trap it is measured di rectly. Such a measurement scheme will make it possible to get rid of a nu mber of systematic uncertainties in measurements with different traps and is proposed for the first time. The gravitational capture of UCNs in a mag netic trap proposed in the project is a fundamentally new approach that ha s never been implemented before. Possible systematic effects due to neutro n depolarization and the turbine effect in a magnetic trap are considered. The experiment can be carried out on the ultracold neutron source under c onstruction at the PIK reactor. The design of the installation and the pla n for its location in the main reactor hall have been developed. The study has been carried out with the support from the Russian Science Foundation \, grant no. 23-22-00169\, https://rscf.ru/project/23-22-00169/.\n\nhttps: //indico.particle.mephi.ru/event/436/contributions/4239/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4239/ END:VEVENT BEGIN:VEVENT SUMMARY:Characterization of new Russian detectors based on trans-stilbene. DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4209@cern.ch DESCRIPTION:Speakers: Alexander Chepurnov (Skobeltsyn Institute of Nuclear Physics (Moscow State University))\nDetectors based on organic crystals o f trans-stilbene and paraterphenyl are the most effective for simultaneou s registration of mixed gamma-neutron fields in the range of 0.1 – 20 M eV\, which is an integral part of scientific and dosimetric measurements i n nuclear power engineering and nuclear medicine. Currently\, organic crys tal detectors are not mass-produced in Russia\, although in the Soviet Uni on there were produced in an industrial scale. In 2022-2023\, employees o f the Federal Research Institute “Crystallography and Photonics” of th e Russian Academy of Sciences developed the original technology and produc ed samples of paraterphenyl and trans-stilbene crystals\, which have been used for the manufacturing of the detectors prototypes. To test the scinti llation properties of the detectors\, the method for determining the light output was used\, including the experimental and simulation stages. Ligh t-output measurement and energy calibration was done by determining the lo cation of the Compton edge when irradiating a sample with standard gamma s ources. The position of the Compton edge was calculated by differentiating the energy spectrum. Comparing the parameters of the Compton edges for di fferent samples the relative light outputs of the samples have been obtain ed.\n\nThe work was supported by the Ministry of Science and Higher Educat ion of the Russian Federation (grant No. 075-15-2024-637).\n\nhttps://indi co.particle.mephi.ru/event/436/contributions/4209/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4209/ END:VEVENT BEGIN:VEVENT SUMMARY:State-of-art imaging in nuclear track emulsion DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4185@cern.ch DESCRIPTION:Speakers: Irina Zarubina (JINR)\nNuclear track emulsion (NTE) remains a universal and cost-efficient detector. The application of NTE is especially well grounded where tracks of nuclear particles cannot be reco nstructed using electronic detectors. At the JINR Nuclotron the BECQUEREL experiment [1] is performed a program of irradiation of NTE stacks in the beams of relativistic isotopes of beryllium\, boron\, carbon and nitrogen\ , including radioactive ones to study their cluster structure. The NTE tec hnique allows one to observe the 3D images of few-body ensembles originate d in peripheral collisions and explore the fragmentation of the relativist ic nuclei down to the most peripheral interactions - nuclear “white” s tars [2]. \n\nThe competitive character of the novel NTE is proved in meas urements of slow α particles and heavy ions (summarized in [3]). The poss ibility of α spectrometry was verified and the atom drift effect is estab lished in measurement of decays of 60 MeV 8He nuclei implanted in NTE [4]. Correlations of α particles in splitting of 12C nuclei by 14.1 MeV neutr ons [5] as well as 7Li and 4He nuclei produced in 10B breakup by thermal n eutrons in boron-enriched NTE [6] are studied. NTE samples were irradiated with relativistic and slow Kr and Xe ions [2\,7\,8]. Surface irradiations of NTE samples were performed with automatic movement of the 252Cf source [9]. \n\nClassic observations of fundamental importance presented in “T he Study of Elementary Particles by the Photographic Method” by C. H. Po well\, P. H. Fowler and D. H. Perkins [10] can serve as a model of clarity in our time. Our research is implemented in keeping with this tradition b y state-of-art means. The rich collection of videos and images of the nucl ear few-body processes gathered at the Web site is presented [1]. In terms of applications they are relevant for the development of advanced systems of automatic search for nuclear interactions\, as well as for university education.\n\n\n1. The BECQUEREL Project WEB site: http://becquerel.jinr.r u/\n\n2. http://becquerel.jinr.ru/movies/movies.html\n\n3. P. I. Zarubin “Recent applications of nuclear track emulsion technique” Phys. At. Nu cl.\, 2016\, 79\, 1525-1535\; DOI: 10.1134/S1063778816130093. \n\n4. http: //becquerel.jinr.ru/miscellanea/8He/8He.html\n\n5. http://becquerel.jinr.r u/miscellanea/DVIN/dvin11.html\n\n6. http://becquerel.jinr.ru/miscellanea/ IBR-2/IBR-2.html\n\n7. http://becquerel.jinr.ru/miscellanea/IC-100/IC-100. html\n\n8. http://becquerel.jinr.ru/miscellanea/U400M/U400M.html\n\n9. htt p://becquerel.jinr.ru/miscellanea/Prague-dosimetry/Prague-dosimetry.html\n \n10. http://becquerel.jinr.ru/text/books/POWELL.pdf\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4185/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4185/ END:VEVENT BEGIN:VEVENT SUMMARY:Deformations of multi-soliton configurations DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4413@cern.ch DESCRIPTION:Speakers: Vakhid Gani (MEPhI)\nWe consider applications of the deformation procedure to two-soliton solutions of the sine-Gordon model. We analyze the resulting kink-antikink configurations of other field-theor etical models.\n\nhttps://indico.particle.mephi.ru/event/436/contributions /4413/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4413/ END:VEVENT BEGIN:VEVENT SUMMARY:Registration of the neutron flux in the experiment on particle acc eleration by a laser field DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4228@cern.ch DESCRIPTION:Speakers: Mikhail Bakulev (Lomonosov Moscow State University F aculty of Physics)\nThe problem of diagnostics of electron reaction produc ts obtained in experiments on particle acceleration by a laser field was s olved. Accelerated electrons were obtained by the interaction of a laser p ulse with a flowing gas target. The central wavelength of the laser pulse is 800 nm\, the duration is about 50 fs\, and the repetition rate is 10 Hz . The energy on the target reaches 60 mJ. Due to the fact that the diagnos is by registering gamma quanta is difficult due to the multiple nature of the particles huge number birth within a short period of time (50 fs)\, th e diagnosis was carried out through the photoneutron birth channel from th e target-converter by the time-of-flight method. Neutrons were recorded us ing cylindrical scintillation detectors based on crystalline trans-stilben e with dimensions of 20x20 mm (1 piece) and 40x40 mm (2 pieces)\, located at distances from 1.5 to 2.7 m from the converter target.\n\nData accumula tion was carried out synchronously with the laser operation. The response of all three detectors was recorded for each pulse. Next\, neutron events were selected by analyzing the detectors response according to the pulse s hape and the time of the pulse registration relative to the laser pulse. T o increase the threshold for neutron energy registration\, digital signal processing was used\, which made it possible to detect a response from neu trons against the background of a decrease in the overload of the detector with a primary pulse of gamma quanta. This made it possible to reduce the time threshold for neutron registration to 200 ns on a fixed detector bas e\, which is equivalent to the threshold for neutron registration of 250\, 450\, 1050 keV\, respectively.\n\nDistributions of candidate events by re gistration time were constructed taking into account the released energy\, which makes it possible to estimate the spectrum of registered neutrons\, which makes it possible to estimate the energy of processes during partic le acceleration by a laser field.\n\nhttps://indico.particle.mephi.ru/even t/436/contributions/4228/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4228/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation for neutron - boron-10 interaction in coating of gaseou s tube counter anode wire and moving of secondary nuclei in media DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4223@cern.ch DESCRIPTION:Speakers: Evgeniy Permyakov (Institute for Nuclear Research of RAS)\nAn simulation for two main reactions of fast neutron and boron-10 i nteaction in anode wire coating\n\nof gas-discharge tube counter is perfor med.\n\nMoving of secondary nuclei ${^4}He$ и ${^7}Li$ within coating is considered.\n\nResidual energy of nuclei is calculated taking into account reaction kinematics.\n\nIt was found that a condition for a both nucleus exit from anode to counter gas must be\n\nclaiming enough high energy abov e 3 MeV and small wire external radius below $20\\mu m$.\n\nhttps://indico .particle.mephi.ru/event/436/contributions/4223/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4223/ END:VEVENT BEGIN:VEVENT SUMMARY:Physical effects near a wormhole DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4157@cern.ch DESCRIPTION:Speakers: Victor Kuryan ()\nOne of the features of general re lativity is the possible existence of space-time with a nontrivial topolog ical and casual global structure . The real three-dimensional space might in principle be multiply connected and there might exist wormholes in it. \nThe presence of a wormhole leads to the appearance of corrections to the Coulomb law. In the present work\, an exact solution of the Laplace equat ion for a flat space with a wormhole whose mouths are spheres is found. It is shown that a point charge is attracted to the wormhole at all points i n space except for the plane of symmetry. An analogy is noted between the attraction of a charge to the mouth of a wormhole and the attraction of a charge to a polarizable body. A freely moving charge experiences accelerat ion due to the presence of attraction to the mouth of a wormhole\, which l eads to the appearance of electromagnetic radiation. The paper presents es timates of the power of electromagnetic radiation for a charge flying near the mouth of a wormhole. The motion of the mouth through the plasma leads to the appearance of inhomogeneities in the distribution of matter and ca n serve as an additional source of cosmological disturbances that signific antly affect the rate of formation of galaxies.\n\nhttps://indico.particle .mephi.ru/event/436/contributions/4157/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4157/ END:VEVENT BEGIN:VEVENT SUMMARY:Grebeniuk V.M.\, Slepnyov S.K.\, Tkachev L.G. Cosmic ray events wi th electromagnetic showers triggered in the NUCLEON experiment DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4263@cern.ch DESCRIPTION:Speakers: Stanislav Slepnyov ()\nDear colleagues\, It's a pity \, my co-authour L.Tkachev has pointed out that the results I wanted to pr esent were not complete\, since the results of analysis of the events caus ed by gamma quanta were not included. I am forced to withdraw as the co-au thors were the main designers of the Scintillator fast trigger system on t he data from which the results were obtained 7 years ago. \nS.K. Slepnyov. \n\nhttps://indico.particle.mephi.ru/event/436/contributions/4263/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4263/ END:VEVENT BEGIN:VEVENT SUMMARY:Registration of neutrons using scintillation detectors in the magn etic field of the HELIS facility DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4200@cern.ch DESCRIPTION:Speakers: Mikhail Kirsanov (MEPhI)\, Sergey Klimanov (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)) \, Mikhail Negodaev (P.N. Lebedev Physical Institute of the Russian Academ y of Sciences)\nScintillation detectors are successfully used to register fast neutrons in the presence of background gamma radiation. However\, whe n scintillation detectors operate near particle accelerators\, a problem a rises due to the presence of a magnetic field near the accelerator.\nIn th is paper we investigate the influence of the magnetic field of the HELIS a ccelerator facility on the parameters of scintillation detector signals an d on the efficiency of separating signals from neutrons and gamma quanta. Each detector contains organic monocrystal p-terphenyl and a Hamamatsu R60 94 photomultiplier tube. The signals from the photomultiplier tube outputs are digitized using a CAEN DT5730 Digitizer. \nThe gamma-quantum sources Cs-137 and Co-60 were used to study the change in the amplitude and shape of the detector signals at different locations of the PMT dynode system re lative to the magnetic field. The presence of a magnetic field leads to a decrease in the amplitude of the signals and distortion of their shape.\nU sing the Cf-252 neutron source\, the dependence of the efficiency of signa l separation from neutrons and gamma quanta on the magnetic field strength was studied. In the absence of a magnetic field\, the coefficient of effi ciency of signal separation Figure of Merit is FOM=1.5. At a magnetic fiel d of 0.5 mT\, the efficiency of signal separation from neutrons and gamma quanta (detectors without a magnetic shield) decreases to FOM=1\, and at a field of ≈ 1 mT\, it becomes impossible to separate the signals. The us e of PMTs with magnetic shields allows neutrons to be registered without d eterioration of the efficiency of signal separation in magnetic fields up to 5 mT.\nIt has been demonstrated that scintillation detectors with magne tic screens effectively register fast neutrons at the HELIS accelerator fa cility.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4200/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4200/ END:VEVENT BEGIN:VEVENT SUMMARY:Monte Carlo simulations of photon propagation in the DIRC DTSTART;VALUE=DATE-TIME:20241024T133000Z DTEND;VALUE=DATE-TIME:20241024T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4198@cern.ch DESCRIPTION:Speakers: Alexey Aparin (JINR)\nThe particle identification sy stem for the barrel region of the ePIC experiment at the future Electron-I on Collider will be based on a DIRC detector. DIRC stands for Detection of Internally Reflected Cherenkov light\, and this technology is planned to be used for charged particle identification for momenta up to at least 6 G eV/c. The DIRC technology is sensitive to the optical properties of the ma terials comprising the optical system of the detector. This contribution p resents simulation studies of optical properties for fused silica\, NLAK3\ , and optical sapphire glass.\n\nhttps://indico.particle.mephi.ru/event/43 6/contributions/4198/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4198/ END:VEVENT BEGIN:VEVENT SUMMARY:Annihilation of lepton and hadron interactions DTSTART;VALUE=DATE-TIME:20241023T081000Z DTEND;VALUE=DATE-TIME:20241023T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4394@cern.ch DESCRIPTION:Speakers: Elena Kokoulina (JINR)\nPhysicists carry out experim ents at the modern accelerators with constantly increasing energy to find out new phenomena and approaches to understanding of internal hadron struc ture and also answer many questions emerged before them. These experiments agree well on the modern theory of strong interactions\, quantum chromody namics\, but there are some results in cosmological observations that can not be explained in this theory and require new approaches and experiments . In that way the increasing of measurement precision and rare event regis tration\, building of other theoretical models and just to name a few can help. Also we think that more detailed analysis of the known interactions can make more clear structure of matter.\nMultiparticle production is one of such studies in high energy physics.\nWe offer the single view to des cribe annihilation processes of leptons and hadrons. It is based on both Q CD quark-gluon jets and phenomenological description of hadronization.\n\n https://indico.particle.mephi.ru/event/436/contributions/4394/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4394/ END:VEVENT BEGIN:VEVENT SUMMARY:Estimation of contribution of gaseous tritium source rear wall to tritium beta-spectrum in search for sterile neutrinos by Troitsk nu-mass e xperiment DTSTART;VALUE=DATE-TIME:20241023T075500Z DTEND;VALUE=DATE-TIME:20241023T081000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4392@cern.ch DESCRIPTION:Speakers: Vladislav Pantuev (Institute for Nuclear Research Ru ssian Academy of Sciences)\nThe goal of the Troitsk nu-mass experiment is a search for sterile neutrinos in the tritium beta decay. The decay electr ons are produced in the windowless gaseous tritium source\, WGTS. The magn etic field in the source is formed by a set of solenoids. Electrons produc ed at large pitch angles to the magnet axis are trapped. Electrons at smal l angles can leave the WGTS for the spectrometer or in the opposite direct ion\, for the rear wall. The spot of electrons escaping from the WGTS to t he rear wall increases in diameter due to the fringe field. These electro ns may scatter on the vacuum pipe and at some combination of scattered ang le and final energy\, may return to the WGTS and reach the spectrometer an d detector. This contamination modifies the original tritium spectrum. We calculate the scattered electron distribution in GEANT4 framework and then apply energy and angular cuts to select the electrons that can reach the detector. The relative contribution of such electrons is 4-5 orders of mag nitude less at the edge of the original spectrum at 17-18.5 keV\, but reac hes 2% at 11 keV. The experimental spectrum fits well with a correction fo r this contribution. The study of the rear wall contribution\, its magneti c field and material configuration is critical for the TRISTAN project\, t he follower of the KATRIN experiment.\n\nhttps://indico.particle.mephi.ru/ event/436/contributions/4392/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4392/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark SHINE --- Search for Light Dark Matter at the SHINE facility in Shanghai DTSTART;VALUE=DATE-TIME:20241023T074000Z DTEND;VALUE=DATE-TIME:20241023T075500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4393@cern.ch DESCRIPTION:Speakers: Danning Liu (Tsung-Dao Lee Institute\, Shanghai Jiao Tong University)\, Danning Liu (TDLI\, SJTU)\nDark SHINE is a fixed-targe t experiment initiative at SHINE (Shanghai high repetition rate XFEL and e xtreme light facility\, being the 1st hard X-ray FEL in China) under const ruction targeting completion in 2026. Dark SHINE aims to search for the ne w mediator\, Dark Photon\, bridging the Dark sector and the ordinary matte r. In this work and presentation\, we present the idea of this new project and 1st prospective study in search for Dark Photon decaying into light d ark matter. It also provides the opportunity to incorporate broader scope of BSM search ideas utilizing the fixed-target experiment of this type.\n\ nRefererence:\n\nSci. China-Phys. Mech. Astron.\, 66(1): 211062 (2023)\, D OI:10.1007/s11433-022-1983-8\n\narXiv:2311.01780\n\narXiv:2310.13926\n\nar Xiv:2401.15477\n\nDOI:10.5281/zenodo.8373963\n\nhttps://indico.particle.me phi.ru/event/436/contributions/4393/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4393/ END:VEVENT BEGIN:VEVENT SUMMARY:Latest results of searches of Higgs Boson decays into Dark Matter particles in the ATLAS experiment DTSTART;VALUE=DATE-TIME:20241023T072500Z DTEND;VALUE=DATE-TIME:20241023T074000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4391@cern.ch DESCRIPTION:Speakers: Marina Pokidova (NRC Kurchatov Institute PNPI\, Pete r the Great St.Petersburg Polytechnic University (SPbPU))\nSearch for Dark Matter (DM) particles is one of the most interesting problem in modern ph ysics. Light dark matter particles may be produced in decays of the Higgs boson that would appear invisible to the detector. \n"Higgs portal" models predict decay of Standard Model Higgs boson into pair of WIMP particles\, which are strong candidates for DM. The production of Higgs Boson in vect or boson fusion process (VBF+MET)\, followed by Higgs decay into DM partic les is the most promising channel for the search due to high signal sensit ivity. This talk presents latest results for VBF+MET and statistical comb ination of Higgs invisible searches obtained at ATLAS Large Hadron Collide r experiment using data collected for Run II ($\\sqrt{s}$ = 13 TeV).\n\nht tps://indico.particle.mephi.ru/event/436/contributions/4391/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4391/ END:VEVENT BEGIN:VEVENT SUMMARY:Multilayer SND (Scattering & Neutrino Detector) optimization for s tatistical analysis of tau-neutrino events using detector response DTSTART;VALUE=DATE-TIME:20241023T071000Z DTEND;VALUE=DATE-TIME:20241023T072500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4390@cern.ch DESCRIPTION:Speakers: Vasilisa Guliaeva (MSU\, MISIS)\nThe SHiP (Search fo r Hidden Particles) experiment is a new fixed-target experiment to be inst alled at the CERN SPS ring with a 400 GeV proton beam energy. The primary goal of the experiment is to detect signals from the Hidden Sector particl es\, introduced to describe dark matter\, baryon asymmetry\, and small neu trino masses. To suppress background\, an iron magnetized hadron absorber and a muon shield are utilized\, along with several veto systems\, aiming to reduce the experiment's overall background to zero over 5 years of oper ation.\n\nSND (Scattering and Neutrino Detector) is the SHiP detector proj ect designed to detect neutrinos of all flavors and direct signals from Li ght Dark Matter (LDM) interactions. An updated design for SND@SHiP include s a high-granularity hadron calorimeter achieved using scintillating fiber s (SciFi) and scintillator layers (Scint).\n\nA key focus of this work is the classification of tau-neutrino events in the SND. This includes distin guishing tau-neutrino interactions via charged current (CC) deep inelastic scattering (DIS) followed by tau lepton decay in both leptonic and hadron ic channels\, from the background of muon-neutrino interactions via CC and neutral current (NC) DIS. Specifically\, the classification is focused on :\n\n - Signal from inelastic interaction of tau-neutrinos via charged cur rent on nuclei followed by tau lepton decay in the leptonic channel (CC DI S $ \\nu_{\\tau} N \\rightarrow \\tau + X \\rightarrow \\mu \\nu_{\\tau} \ \nu_{\\mu}+ X $) against the background of signal from inelastic interacti on of muon neutrinos via charged current on nuclei (CC DIS $ \\nu_{\\mu} N \\rightarrow \\mu + X $).\n - Signal from inelastic interaction of tau-ne utrinos via charged current on nuclei followed by tau lepton decay in the hadronic channel (CC DIS $ \\nu_{\\tau} N \\rightarrow \\tau + X \\rightar row hadrons + X $) against the background of signal from inelastic interac tion of muon neutrinos via neutral current on nuclei (NC DIS $ \\nu_{\\mu} N \\rightarrow \\nu_{\\mu} + X $ ).\n\nThe search for tau-neutrino signal was performed using reconstructed kinematics of secondary particles and d etector response. Inelastic neutrino interaction events from the SHiP expe riment spectrum on nuclei were simulated using the GENIE package\, and sec ondary particles were passed through the detector using the GEANT4 package . Simulations show that the average error in muon momentum determination i s about 12%\, while vertex reconstruction accuracy is $\\sim$1.5 cm. The e nergy resolution for pions ranges from $\\sim50\\%/\\sqrt{E}$ for energies between 1 and 100 GeV. A classifier was developed using machine learning methods trained on both kinematic and detector response variables\, capabl e of accurately classifying event types.\n\nhttps://indico.particle.mephi. ru/event/436/contributions/4390/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4390/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of experimental data on neutron decay for the possibility of the existence of right vector boson $W_R$ DTSTART;VALUE=DATE-TIME:20241023T065000Z DTEND;VALUE=DATE-TIME:20241023T071000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4389@cern.ch DESCRIPTION:Speakers: Anatolii Serebrov (NRC "Kurcharov institute" - PNPI) \nThe analysis of the latest most accurate experimental data on neutron de cay for the possibility of the existence of a right vector boson $W_R$ was carried out. As a result of the analysis\, it was found that there is an indication of the existence of a right vector boson $W_R$ with a mass of $M_{W_R }= 304_{-22}^{+28}$ GeV and a mixing angle with $W_L: \\zeta = -0. 038\\pm{0.014}$. This result should be considered\, on the one hand\, as a challenge to experimental physics at colliders\, where the upper limit on the mass of the right vector boson $W_R$ is significantly higher\, and on the other hand\, it indicates the need for even more accurate measurement s of neutron decay and its theoretical analysis. Possible consequences are considered\, assuming that the result can be confirmed. First\, an extens ion of the SM by introducing right vector bosons $W_R^±$\, $Z_R$ and righ t neutrinos would be required. Second\, right neutrinos can be considered as candidates for dark matter.\n\nhttps://indico.particle.mephi.ru/event/4 36/contributions/4389/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4389/ END:VEVENT BEGIN:VEVENT SUMMARY:Characteristics of EAS electron-photon and hadron components detec ted by the facilities of the Experimental Complex NEVOD DTSTART;VALUE=DATE-TIME:20241025T074500Z DTEND;VALUE=DATE-TIME:20241025T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4361@cern.ch DESCRIPTION:Speakers: Elena Yuzhakova ()\nA multi-component approach to th e study of extensive air showers (EAS) is being implemented in the Experim ental Complex (EC) NEVOD (MEPhI\, Moscow). The detection of the electron-p hoton component of air showers is carried out by the NEVOD-EAS array\, whi ch consists of 144 scintillation counters combined into 9 clusters. The ai r-shower hadronic component is measured using 72 neutron detectors grouped in 12 clusters of the URAN array.\n\nIn the report\, characteristics of e xtensive air showers detected by the EC NEVOD facilities are discussed. Th e accuracies of reconstructing main air-shower parameters with the NEVOD-E AS and URAN arrays have been estimated. The lateral distribution functions of EAS thermal neutrons and electron-photon component have been obtained. The spectra of air-shower size based on the data of two arrays are presen ted\, and the reconstructed energy spectrum of primary cosmic rays is give n.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4361/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4361/ END:VEVENT BEGIN:VEVENT SUMMARY:On the study of the muon energy spectrum in the Baikal-GVD neutrin o telescope DTSTART;VALUE=DATE-TIME:20241025T073000Z DTEND;VALUE=DATE-TIME:20241025T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4360@cern.ch DESCRIPTION:Speakers: Mikhail Lisitsin (National Research Nuclear Universi ty MEPhI)\nThe muon component of the extensive atmospheric showers (EAS) i s widely used in high-energy physics as a tool to study the processes of n ucleus-nucleus interactions and decays of secondary particles. Information about muons with energies above 100 TeV can carry information about cosmi c ray sources\, as well as elements of “new physics”\, so the task of measuring the energy spectrum of such muons is promising. The only instrum ent for measuring the energy of ultrahigh-energy muons above 100 TeV are c urrently the gigaton neutrino telescopes (IceCube\, Baikal-GVD).\n Very High Energy muons (VHE-muons)\, being born in the EAS\, arrive at t he facility accompanied by low multiplicity bundles. Such events are diffi cult to distinguish from events with large multiplicity bundles but withou t VHE-muon\, since the total energy and energy release may be similar for such large bundles and single VHE-muons accompanied by small bundles. From this feature of VHE-muons\, the necessity arises to develop a universal m ethod to separate such events in gigaton neutrino telescopes.\n V HE-muons tend to lose their energy stochastically\, sometimes in large por tions\, while the energy release of low-energy muons has a less expressed stochastic character. The peak-median ratio of the longitudinal energy rel ease profile of an event allows us to exploit this feature and identify mu on bundles with ultrahigh energy muons. In this work\, we analyze the spec trum of EAS muon bundles and evaluate the possibility of registering and i dentifying muon bundles with VHE-muons using the peak-median ratio of the longitudinal energy release profile.\n\nhttps://indico.particle.mephi.ru/e vent/436/contributions/4360/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4360/ END:VEVENT BEGIN:VEVENT SUMMARY:Measuring the Polarizabilities of Neutral and Charged Pions at JLa b DTSTART;VALUE=DATE-TIME:20241025T071500Z DTEND;VALUE=DATE-TIME:20241025T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4362@cern.ch DESCRIPTION:Speakers: Victor Tarasov (NRC "Kurchatov Institute")\nfor the CPP/NPP collaboration\n\nThe electric and magnetic polarizabilities of a p article describe its\nresponse to external electric and magnetic fields. T he values of electric (alpha) and magnetic (beta) polarizabilities depend on the "stiffness" of the particle's constituent bonds and provide importa nt information about its internal structure. As the lightest bound state o f QCD\, the pion's polarizability is measured to test Chiral Perturbation Theory\n(ChPT) at low energies.\n\nThe polarizabilities of charged and neu tral pions will be extracted from\nexperimental data obtained at Jefferson Lab. This involves measuring the cross-section of pion pair production du ring the interaction of a 4.5...6 GeV photon beam with a lead target via t he Primakoff effect.\n\nThis talk will cover existing measurements of pion polarizability and the\ncurrent state of the experiment at Hall D in Jeff erson Lab.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/436 2/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4362/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of beam trigger detectors for the BM@N experiment DTSTART;VALUE=DATE-TIME:20241025T141000Z DTEND;VALUE=DATE-TIME:20241025T142500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4253@cern.ch DESCRIPTION:Speakers: Valyo Velichkov ()\nA system of beam detectors for f ast analysis of beam ions and projectile spectators in the BM@N experiment was developed and applied in the 2023 BM@N run with $^{124}$Xe ions at en ergy of 3.8 A GeV and beam intensity up to $10^6$ ions per burst. The basi c elements of the detectors are thin scintillators with thickness from 0.1 5 to 0.5 mm and special PMTs operating in the strong magnetic field of the BM@N magnet. The detectors provide good pulse height resolution and picos econd timing. The main aim of the system in the BM@N experiment is active control of beam ion transport through the experimental area providing a se t of different triggers for data taking including the minimum bias trigger which selects interactions in the target. The design and characteristics of the detectors are presented as well as their performance in the run. Up grade plan for future runs is discussed.\n\nhttps://indico.particle.mephi. ru/event/436/contributions/4253/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4253/ END:VEVENT BEGIN:VEVENT SUMMARY:The BM@N experiment online data processing and QA system DTSTART;VALUE=DATE-TIME:20241025T135500Z DTEND;VALUE=DATE-TIME:20241025T141000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4190@cern.ch DESCRIPTION:Speakers: Ilnur Gabdrakhmanov (JINR)\nThe BM@N experiment (Bar yonic Matter at Nuclotron) is a fixed target experiment and the first stag e of the NICA project (Nuclotron based Ion Collider fAcility). The experim ental facility is designed to explore properties of dense quark matter.\nT he code for data decoding\, track reconstruction and QA is being developed as a part of BmnRoot – a BM@N software framework\, based on the FairRoo t package.\nThe QA system is capable of online decoding of the raw data st ream from the data acquisition\, the consequent reconstruction and live we b histogramming. The system is flexible and allows to run decoding\, recon struction and monitoring processes as processes on different machines exch anging data via ZeroMQ sockets.\nThe user is able to monitor any detector subsystem\, select specific detector station\, plane\, time or strip profi le histograms in 1/2/3D view.\nThe QA functions are presented by reference run auto-selecting and consequent overlaying histograms.\nThe online QA h as been tested on several technical and the physical run during the 4th NI CA commissioning run.\n\nhttps://indico.particle.mephi.ru/event/436/contri butions/4190/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4190/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance of the Scintillation Wall in the the first physics run at the BM@N Experiment DTSTART;VALUE=DATE-TIME:20241025T134500Z DTEND;VALUE=DATE-TIME:20241025T135500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4212@cern.ch DESCRIPTION:Speakers: Vadim Volkov (INR RAS\, MIPT)\nThis report presents the performance of the scintillation wall detector (ScWall) in the first p hysics run of the BM@N fixed target experiment with Xe+CsI reaction at 3.8 AGeV. The ScWall detects fragments with charges Z = 1 and Z = 2 in the ce ntral small scintillator detectors\, while fragments with charges up to Z = 5 are observed in the detectors close to the beam hole. Comparisons with models revealed that DCM–QGSM–SMM and PHQMD underestimated Z = 2 frag ments yields and overestimated those with higher Z. The results underline the need to adjust these models for a more accurate description of spectat or fragment production in nucleus-nucleus collisions. In addition\, centra lity estimation using the total charge of ScWall showed less correlation w ith the impact parameter compared to FHCal energy deposition. The purity a nalysis shows that minimum centrality class size based on FHCal energy dep osition should be at least 20% to achieve 80% purity. Furthermore\, both S cWall and FHCal were effective in estimating the event plane\, with FHCal demonstrating superior resolution correction\, making it the preferred cho ice for precise flow measurements in heavy-ion collisions at BM@N.\n\nhttp s://indico.particle.mephi.ru/event/436/contributions/4212/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4212/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance of the Time-of-Flight detector systems at the BM@N exp eriment DTSTART;VALUE=DATE-TIME:20241025T133000Z DTEND;VALUE=DATE-TIME:20241025T134500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4205@cern.ch DESCRIPTION:Speakers: Irina Zhavoronkova ()\nBM@N is the first experiment at the NICA accelerator complex\, aimed at studying baryonic matter under high-density conditions. This allows researchers to probe the equation of state (EOS) and explore the properties of this matter\, including the pote ntial discovery of new high-density phases. For identifying charged partic les in BM@N\, two time-of-flight systems\, TOF400 and TOF700\, are utilize d. During the first physical run in 2022-2023 more that 550 million events of Xe+CsI collisions were collected. \nAccurate particle identification requires precise time-of-flight measurements\, necessitating regular calib rations to ensure the systems maintain their high time resolution. This pr esentation will cover the calibration process and performance of the TOF40 0 and TOF700 systems after the physical run.\n\nhttps://indico.particle.me phi.ru/event/436/contributions/4205/ LOCATION: Petrovskiy 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4205/ END:VEVENT BEGIN:VEVENT SUMMARY:PMT/WLS plate optical modules for Cherenkov detectors DTSTART;VALUE=DATE-TIME:20241025T101500Z DTEND;VALUE=DATE-TIME:20241025T103000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4221@cern.ch DESCRIPTION:Speakers: Yan Stroke (INR RAS)\nOptical modules which consist of photomultipliers and wavelength shifting (WLS) plates are considere d as photosensors for water Cherenkov detectors. A WLS plate absorbs Ch erenkov light and reemits it at longer wavelengths. The reemitted lig ht is then detected by a PMT. Such an optical module allows to increase the efficiency of the Cherenkov light detection by a factor of 2 . This r eport will describe the design of modules\, optimization of the concentrat ion of WLS dopants\, and present the results of measurements of paramete rs of WLS plates and PMTs\, including the light yield\, efficiency\, an d dark rate. Selection of a reflector will be also discussed\, as as we ll the study of plates aging using high temperature tests.\n\nhttps://indi co.particle.mephi.ru/event/436/contributions/4221/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4221/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of the total MPD/ECAL setup for cosmic ray calibration DTSTART;VALUE=DATE-TIME:20241025T093000Z DTEND;VALUE=DATE-TIME:20241025T094500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4235@cern.ch DESCRIPTION:Speakers: M. A. Martemianov (NRC «Kurchatov Institute»\, Rus sia 123182\, Moscow\; NRNU MEPhI\, Russia 115409\, Moscow)\nThe Multi-Purp ose Detector (MPD) has a main goal to investigate the hot and dense baryon ic matter produced in heavy-ion collisions at the NICA collider [1]. An im portant subsystem of the MPD detector is the barrel electromagnetic calori meter (ECal)\, which allows the high-precision measurement of the spatial coordinates and energy of photons and electrons. ECal consists of 50th hal f-sectors containing 768 trapezoidal “shashlyk” type towers in a proje ctive geometry orientation [2]. Currently\, the half-sectors undergo calib ration on cosmic rays in two modes using inclined and longitudinal muon tr acks relative to the tower axis. In simulation cosmic muons are produced o n the vertical cylinder surface using a fast cosmic muon generator [3]. Fo r inclined tracks\, when at least three adjacent towers are triggered in l ine\, the energy deposition distribution shows a clear characteristic peak and its position determines the calibartion factor. This method depends o n tower position in the total ECal setup. The next one is based on the fac t of signal absence in the neighboring towers in relation to the investiga ted one and makes it possible to identify a peak with an average energy re lease in the higher region. Using both methods provides a good cross-check of the calibration procedure. A self-triggering capability of the readout system gives an opportunity to calibrate the calorimeter without using ex ternal detectors. For the inclined mode\, energy depositions for calibrati on were obtained and parametrized for all towers. The longitudinal mode is also applicable\, except for towers with a nearly horizontal orientation. \n\nBibliography\n\n[1] V. Abgaryan et al.\, Eur.Phys.J. A. 58\, 140 (202 2).\n\n[2] M. Bhattacharjee et al.\, Phys.Part.Nucl. 55\, 803 (2024).\n\n[ 3] V.A. Baskov et al.\, Phys.Part.Nucl. 52\, 663 (2021).\n\nhttps://indico .particle.mephi.ru/event/436/contributions/4235/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4235/ END:VEVENT BEGIN:VEVENT SUMMARY:Electromagnetic Calorimeter of the Belle II Detector DTSTART;VALUE=DATE-TIME:20241025T090000Z DTEND;VALUE=DATE-TIME:20241025T091500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4192@cern.ch DESCRIPTION:Speakers: Alexander Kuzmin (BINP)\nThe electromagnetic calorim eter (ECL) is one of the essential subsystems of the Belle II particle det ector. The ECL consists of 8736 CsI(Tl) crystals and is designed to measur e direction and momentum of detected particles in high energy range\, in t he conditions of high beam background. To achieve these objectives\, ECL d ata readout system uses high sampling rate\, combined with advanced wavefo rm analysis implemented in FPGA modules. These features\, in addition to s low control and reconstruction software ensure good performance of the cal orimeter in current physics runs\, as well as high-rate tests with 40 kHz trigger rate.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/ 4192/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4192/ END:VEVENT BEGIN:VEVENT SUMMARY:Review of achievements in the development of two-phase emission de tector technology and setting up experiments in modern particle physics DTSTART;VALUE=DATE-TIME:20241025T084500Z DTEND;VALUE=DATE-TIME:20241025T090000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4237@cern.ch DESCRIPTION:Speakers: Alexander Bolozdynya (NRNU MEPhI)\nThe technology of two-phase emission detectors has been introduced into experimental practi ce at MEPhI 50 years ago. This type of detectors is extremely sensitive t o ionization (down to individual electrons)\, can be used in very massive (on the scale of hundreds of tons) detectors in order to provide high coun t rate for quite rare events and organize an active shielding from natural radioactivity in the wall-les configuration of the readout systems. Emis sion detectors have found their unique application in the most sensitive a t the moment experiments searching for cold dark matter in the form of wea kly interacting massive particles (WIMPs)\, accelerator neutrino physics\, searching for neutrino less double beta decay search and observing elasti c coherent scattering of reactor neutrinos off atomic nuclei. Future prosp ects will be discussed.\n\nhttps://indico.particle.mephi.ru/event/436/cont ributions/4237/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4237/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance of the trigger system of the MPD experiment DTSTART;VALUE=DATE-TIME:20241025T094500Z DTEND;VALUE=DATE-TIME:20241025T100000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4208@cern.ch DESCRIPTION:Speakers: Victor Riabov (PNPI\, MEPHI)\nThe Multi-Purpose Dete ctor (MPD) is a heavy-ion experiment of the NICA complex under constructio n at JINR\, Russia. With heavy-ion collisions in collider and fixed-target modes\, MPD will be able to cover the energy range $\\sqrt{s_{NN}}=2.4-11 $ GeV and thus study the baryon-rich region of the QCD phase diagram. Comm issioning of the MPD detector with Xe/Bi beams is expected in late 2025. T he trigger system of the MPD detector includes several subsystems covering the forward and central rapidity regions. In this contribution\, we revie w the performance of the system for the collider and fixed-target modes of operation\, and discuss the implications for the system size and the coll ision energy scans needed for successful implementation of the NICA physic s program.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/420 8/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4208/ END:VEVENT BEGIN:VEVENT SUMMARY:Challenges for next generation of vertex detectors for collider ex periments DTSTART;VALUE=DATE-TIME:20241025T083000Z DTEND;VALUE=DATE-TIME:20241025T084500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4206@cern.ch DESCRIPTION:Speakers: Grigory Feofilov (Saint-Petersburg State University) \nNew studies of extremely hot and strongly interacting matter\, formed in the collision of relativistic nuclei\, are proposed at the currently runn ing Relativistic Heavy- Ion Collider (RHIC) and the Large Hadron Collider (LHC)\, while the colliders like FAIR (Facility for Antiproton and Ion Res earch) and NICA (Nuclotron-based Ion Collider fAсility) are being constr ucted to bring a deeper insight into the dynamics of multiparticle produ ction in the high baryon density region of the QCD phase diagram.\n These new physics programs are pushing the limits of the existing ex perimental research thus imposing strict requirements on the characteristi cs of the new detectors proposed for future applications. So-called vertex detectors are among the most demanding devices of cutting-edge research\, facing extremely contradictive requirements. Among them are the closest distance to the beams collision point\, minimum amount of low-Z matter alo ng particle tracks and high thermo-mechanical stability of precisely loc ated sensors\, fine granularity and capability to work at high counting ra tes. \n In the first part of this report\, we present the m ajor challenges existing for measurements of low-momentum charm and beauty hadrons and low-mass di-electrons formed in heavy-ion collisions at the L HC. A brief overview of the existing technology of secondary vertices iden tification\, used in the current experiments at the LHC and RHIC\, will b e also provided. We will discuss in the second part of the report the exis ting critical items and the technological challenges to be met (the necess ity of application of high-granularity sensors\, the extremely minimal mat erial budget and the high precision layout\, thermo-mechanical stability and the efficient cooling). Finally\, we will present the results of feas ibility studies of practical solutions proposed at Saint-Petersburg State University that could be considered for the next generation of the vertex detectors including the on-going developments for the experiments at NICA collider.\nThe authors acknowledge Saint-Petersburg State University for a research project 95413904\n\nhttps://indico.particle.mephi.ru/event/436/c ontributions/4206/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4206/ END:VEVENT BEGIN:VEVENT SUMMARY:Relative calibration of the TUS photodetector in filght DTSTART;VALUE=DATE-TIME:20241025T091500Z DTEND;VALUE=DATE-TIME:20241025T093000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4202@cern.ch DESCRIPTION:Speakers: Alexandr Blinov (Joint Institute of Nuclear Research )\nThe TUS experiment became the first detector to measure the fluorescent and Cherenkov radiation of extensive atmospheric showers (EAS) in the Ear th's atmosphere from space orbit. The main purpose of this experiment was to search for and study ultrahigh-energy cosmic rays with energies E > 70 Eev. The TUS detector registered dozens of anomaly events\, the origin of which is unclear. During the first orbits of the satellite\, the high volt age regulation system of photoelectronic multiplier tube (PMT) did not wor k correctly\, and because of this\, ~ 20% of the PMTs are dead\, and the r emaining ones irreversibly changed their characteristics. The anomaly even ts give a possibility to do a relative calibration of the photodetector ma trix. The preliminary results of the calibration will be presented.\n\nhtt ps://indico.particle.mephi.ru/event/436/contributions/4202/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4202/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of wavelength-shifting plates for the outer detector Hyper-K amiokande DTSTART;VALUE=DATE-TIME:20241025T061500Z DTEND;VALUE=DATE-TIME:20241025T062500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4220@cern.ch DESCRIPTION:Speakers: Gleb Erofeev (INR RAS)\nHyper-Kamiokande is a new ge neration of 260 kiloton water Cherenkov detector\, construction of which b egan in 2020. One of the main goals is to search for CP symmetry violation in neutrino oscillations. Hyper-Kamiokande is divided into internal and o uter detectors\, which are equipped with photomultiplier tubes (PMT). The outer detector (OD) is used as a veto system for incoming charged particle s\, mainly muons. In OD\, Cherenkov radiation is detected by photomultipli ers with a diameter of 8 cm and wavelenght-shifting (WLS) plates\, which c over the “dead” space between the photomultipliers and thereby increas e the light collection area of OD and increase the efficiency of detecting background events. In total\, it is planned to use about 3600 photomultip liers in combination with WLS plates in the Hyper-Kamiokande outer detecto r. Light from Cherenkov radiation will hit the plates\, be absorbed and th en re-emitted in accordance with the relationship between the emission and absorption spectra of the material used. The report will present the resu lts of a study of parameters of WLS plates and a method for quick tests an d control their quality.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4220/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4220/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of the background from (α\, n) reactions in the JUNO s cintillator DTSTART;VALUE=DATE-TIME:20241025T071000Z DTEND;VALUE=DATE-TIME:20241025T072500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4224@cern.ch DESCRIPTION:Speakers: Maxim Gromov (SINP MSU)\nThe Jiangmen Underground Ne utrino Observatory (JUNO) experiment is a new generation neutrino project. Its main and ultimate goal is to determine the neutrino mass ordering. To achieve this fundamental milestone\, the precise reactor neutrino spectro scopy based on the Inverse Beta Decay reaction will be applied. The approa ch implies detailed knowledge of all relevant backgrounds in the liquid sc intillator target of the detector. One significant background are (α\, n) reactions\, which occur on 13C nuclei and are possible due to the presenc e of residual radio-impurities\, mainly\, 238U\, 232Th and 210Pb. This wor k describes the simulation of this background\, performed using open sourc e Geant4-based software called SaG4n\, a new event generator and the dedic ated JUNO detector response simulation package. All stages of the reaction were considered\, including\, in particular\, the α particle propagation in the medium before the interaction and emission of a neutron and de-exc itation particles from the excited states of the final nucleus. The total and partial (α\, n) background event rates and the respective shapes of t he energy spectra have been obtained within the expected radioactivity con centration. The simulation pipeline and its outcomes are relevant for othe r neutrino experiments using organic liquid scintillator and may be useful for dark matter search projects. \n\nThis work is supported in the framew ork of the State project “Science” by the Ministry of Science and High er Education of the Russian Federation under the contract 075-15-2024-541. \n\nhttps://indico.particle.mephi.ru/event/436/contributions/4224/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4224/ END:VEVENT BEGIN:VEVENT SUMMARY:A concept of neutrino scintillation detector with threshold below 1 keV DTSTART;VALUE=DATE-TIME:20241025T074000Z DTEND;VALUE=DATE-TIME:20241025T075500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4193@cern.ch DESCRIPTION:Speakers: Alexander Strizhak (Institute for Nuclear Research o f the Russian Academy of Sciences(RU)\, MIPT)\nA modular SrI2(Eu) scintill ation ultra-low energy threshold neutrino detector is being developed in I NR RAS to research low energy neutrinos produced in radioactive isotope de cays and also reactor neutrinos. Proposed layer structure of the detector allows to easily scale it depending on the task. Each layer will consist o f 16 modules\, each comprising 4 scintillation crystals. Readout of each c rystal is done by a SiPM matrix. In this work\, performance of SrI2(Eu) sc intillation detectors will be discussed. The light yield of SrI2(Eu) scint illator can reach up to 120 p.e./keV. SiPMs with high photon detection eff iciency (PDE) of around 50% can be used to lower the threshold down to ~10 0 eV. SrI2(Eu) emission spectrum aligns well with SiPM maximum PDE. It wil l be shown that Dark Current Rate (DCR)\, which is the main disadvantage o f utilizing SiPMs for low threshold measurements\, is suppressed at temper atures below -60°C. DCR of several SiPM matrixes was tested in a broad te mperature range for various operating voltages. The measurements show sati sfactory light yield of tested SrI2(Eu) scintillation detector prototypes. Preliminary results of scintillation detectors confirm the ability to det ect recoil electrons with energy below 1 keV. A developed coincidence sche me and single electron counting regime should allow to decrease noise rate and to detect events with the discussed threshold of 100 eV.\n\nhttps://i ndico.particle.mephi.ru/event/436/contributions/4193/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4193/ END:VEVENT BEGIN:VEVENT SUMMARY:Infrastructure of 5 ton Baksan large neutrino telescope prototype DTSTART;VALUE=DATE-TIME:20241025T065500Z DTEND;VALUE=DATE-TIME:20241025T071000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4225@cern.ch DESCRIPTION:Speakers: Arslan Lukanov (INR RAS)\nThe availability of the ne cessary infrastructure is a prerequisite for the proper functioning of the detector\, the article describes a magnetic field compensation system and a liquid scintillator purification system for a 5-ton prototype of the Ba ksan large neutrino telescope. Detectors based on liquid scintillators pla y an important role in experiments in neutrino physics and particle astrop hysics. Currently\, a liquid scintillator based on linear alkylbenzene (LA B) with the addition of PPO (2\,5-diphenyloxazole) and bis-MSB (1\,4-bis(2 -methylstiryl)benzene) is actively used in large-scale neutrino experiment s. High optical characteristics of the scintillator and a low radioactive background are necessary for the effective operation of the detector. The main methods of cleaning liquid scintillators are:\n1. Chromatographic pur ification on columns filled with aluminum oxide (Al2O3)\, which removes or ganic and radioactive impurities and increases transparency\n2. Water extr action to remove radioactive impurities\n3. Vacuum molecular distillation\ nPhotomultiplier tubes\, especially large-sized PMTs used in the project\, are sensitive to a magnetic field. The influence of the magnetic field ha s a negative effect on the resolution of the photomultiplier tubes\, and i t also affects the jitter in the PMT\, which ultimately affects the accura cy of localization of the scintillation flash in the target volume. In thi s case\, it is necessary to use a magnetic field compensation system\n\nht tps://indico.particle.mephi.ru/event/436/contributions/4225/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4225/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of light yield quenching and the 14C content in liqui d scintillator of 5 ton prototype of Baksan Large Neutrino Telescope Proje ct DTSTART;VALUE=DATE-TIME:20241025T064500Z DTEND;VALUE=DATE-TIME:20241025T065500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4216@cern.ch DESCRIPTION:Speakers: Andrei Sidorenkov (INR RAS)\nLiquid scintillators ha ve always been an important part of many experiments in\nneutrino physics. The liquid scintillator based on linear alkylbenzene (LAB) is\nused in a prototype of Baksan Large Neutrino Telescope\, which is proposed to be\nco nstructed at the Baksan Neutrino Observatory. The main disadvantage of liq uid\nscintillator is the non-linear response to highly ionizing radiation\ , called ionization quenching. The response of the LAB-based scintillator was measured in the energy range of gamma-quanta from 60 keV to 1.3 MeV an d the Birks parameter was obtained. The 14C content of a LAB-based scintil lator has been measured using the prototype of Baksan Large Neutrino Teles cope with the scintillator mass of 0.5 tons. The 14C/12C ratio has been ob tained.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4216/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4216/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the possibility of using 3D printing in low-background ex periments DTSTART;VALUE=DATE-TIME:20241025T062500Z DTEND;VALUE=DATE-TIME:20241025T063500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4244@cern.ch DESCRIPTION:Speakers: Vladimir Kazalov (INR RAS)\nCurrently\, one of the m ost significant areas of research in physics is the search for neutrinoles s double beta decay. To conduct such studies\, it is necessary to minimize the level of the radioactive background of the experiment. The selection of the purest structural materials is necessary\, since the achieved backg round level determines the final sensitivity of the experiment to the stud ied physical processes. This is achieved through various methods\, includi ng placing installations in underground laboratories\, carefully selecting structural materials\, and using active background suppression techniques . However\, the new generation of experiments require an even lower level of natural radioactive background. Both the detector itself and its surrou nding shield elements contain background sources that are unavoidable. The refore\, it is not only important to look for new materials with lower bac kgrounds\, but also to ensure that there is no radioactive contamination d uring the production and processing of parts. At present\, 3D printing tec hnology has become widely used. The use of this technology can avoid the n eed for mechanical processing of manufactured parts\, preventing potential additional contamination during the manufacturing process\, reducing its duration\, and reducing the number of steps required for final cleaning be fore installing the parts. 3D printing allows for the creation of complex structural elements with acceptable mechanical strength using a small \nam ount of material\, and manufacturing parts in a shorter time.\n\nWe have s tudied the possibility of using 3D printing to create structural elements of low-background detectors and low-background shields. The materials used for 3D printing were studied using low-background semiconductor gamma-ray spectrometers at the Baksan Neutrino Observatory of the INR RAS in order to measure the activity of radioactive impurities in these materials. Thes e measurements made it possible to select the purest samples of filaments for 3D printing\, which were subsequently used in the development and prin ting of the body of the test scintillation detector.\n\nTest calibration m easurements were carried out using a scintillation detector with a body pr inted on a 3D printer in order to verify the possibility of using 3D print ing to create structural elements of detectors. We have printed the body o f a scintillation detector with a volume of 100 cm3. A scintillation dete ctor was manufactured using a LAB-based scintillator with the additives PP O (2 g/L) and Bis-MSB (0.02 g/L)\, which was filled into a printed case. T he volume of the detector was viewed using the PMT-97. To verify the funct ionality of the experimental setup\, a series of measurements were carried out using calibration sources $^{137}$Cs and $^{60}$Co. The background sp ectrum was collected over a period of 16 hours at the Laboratory Building of the BNO INR RAS. The results obtained confirmed the feasibility of usin g 3D printing for manufacturing structural elements of detectors. In the n ext stage\, to avoid possible contamination of the samples during printing by $^{222}$Rn daughter products or other radioactive isotopes that may be present in the air\, we plan to place the printer in a dust-free area of the low-background\, deep-laying laboratory at the BNO INR RAS. It is plan ned to additionally place it in a special protective casing surrounding th e 3D printer\, in which a nitrogen (or argon) atmosphere will be created.\ n\nThis study was supported within the State contract of the Ministry of S cience and Higher Education of the Russian Federation no. FZZR-2022-0004.\ n\nhttps://indico.particle.mephi.ru/event/436/contributions/4244/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4244/ END:VEVENT BEGIN:VEVENT SUMMARY:Studies of single-photoelectron response of 20-inch NNVT MCP-PMT DTSTART;VALUE=DATE-TIME:20241025T063500Z DTEND;VALUE=DATE-TIME:20241025T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4227@cern.ch DESCRIPTION:Speakers: Nikita Ushakov (INR RAS)\nThe use of large-area phot omultipliers is reasonable in large-volume liquid-scintillation neutrino d etectors\, such as JUNO or the planned Baksan Large Neutrino Telescope. Th ere are currently two models of 20-inch photomultipliers on the market\, t he dynode-PMTs Hamamatsu R12680 and the NNVT MCP-PMTs (microchannel plate PMTs)\, both are used in JUNO. However\, despite some advantages of the N NVT MCP-PMT\, there is a problem of determining their single-photoelectron response\, which entails the problem of determining the number of photoel ectrons and\, therefore\, the energy of the particles. In this work\, we h ave studied the single-photoelectron response of the NNVT MCP-PMT and some of its other characteristics\, and compared them with the characteristics of the Hamamatsu R12860.\n\nhttps://indico.particle.mephi.ru/event/436/co ntributions/4227/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4227/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of lepton tracks from neutrino events in the upgraded N D280 detector complex of the T2K experiment. DTSTART;VALUE=DATE-TIME:20241025T060000Z DTEND;VALUE=DATE-TIME:20241025T061500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4199@cern.ch DESCRIPTION:Speakers: Alexandr Shvartsman (INR RAS)\nThe upgraded near neu trino detector[1\,2\,3] of the T2K experiment[4] is briefly described. The central part is the 3D scintillator fine-grained detector (SuperFGD). The detector comprised of about 2 million 1 × 1 × 1 cm3 plastic scintillato r cubes with three orthogonal holes for wavelength shifting fiber readout[ 2\,5]. It will be used as an active neutrino target to detect charged part icles and photons. A combination of SuperFGD with the other subdetector sy stems in the ND280 detector provides a possibility to detect more neutrino events (due to an additional active target)\, as well as to increase the accuracy of the neutrino events reconstruction[3]. In this work\, the resu lts of Monte Carlo simulation of the interactions of electron and muon neu trinos in the updated ND280 complex are presented. The efficiency of match ing tracks between SuperFGD and other subdetectors of the upgraded ND280 w ill be discussed.\n\nhttps://indico.particle.mephi.ru/event/436/contributi ons/4199/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4199/ END:VEVENT BEGIN:VEVENT SUMMARY:Radiation hardness study of optical glasses for the DIRC technolog y DTSTART;VALUE=DATE-TIME:20241024T153000Z DTEND;VALUE=DATE-TIME:20241024T154500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4197@cern.ch DESCRIPTION:Speakers: Maria Patsyuk (JINR)\nThe radiation hardness of opti cal materials and stability of optical properties in aggressive radiation environment is one of crucial issues for the detectors based on the detect ion of Cherenkov light\, such as DIRC(s) at the Electron-Ion Collider at t he Brookhaven National Laboratory. This contribution presents the results of radiation hardness tests performed with the following optical materials : fused silica\, optical sapphire glass\, and BaF. The irradiation was per formed on the Microtron MT-25 at Flerov laboratory of Joint Institute for Nuclear Research (JINR\, Dubna\, Russia)\, and theoretical calculations of the consumed dose are presented. The light transmittance over a wide rang e of wavelengths was tested for the consumed doses up to 20 MRad.\n\nhttps ://indico.particle.mephi.ru/event/436/contributions/4197/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4197/ END:VEVENT BEGIN:VEVENT SUMMARY:Artificial neural network approach to detector configuration optim ization based on the impact parameter estimation problem. DTSTART;VALUE=DATE-TIME:20241024T150000Z DTEND;VALUE=DATE-TIME:20241024T151500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4236@cern.ch DESCRIPTION:Speakers: Kirill Galaktionov ()\nIn our work we investigated a pplication of artificial neural networks to event-wise analysis of heavy i on collisions data. We focused on solving the problem of impact parameter evaluation and estimation of collision vertex coordinate\, using simulated data from a microchannel plate detector (MCP) [1] for potential use in NI CA collider experiments [2]. Our study reveals\, that such a technique can be utilized to estimate collision parameters quite accurately from raw de tector data [3\, 4\, 5] based on QGSM\nevent generator [6]\, specifically from spatial distributions of particles and time-of-flight distributions.\ n\nHowever\, ANNs results are highly dependent on the model of event gener ator used to create the dataset. Repeating the experiments with data from alternative generators [7\, 8] yielded different results. Despite this mod el dependence of the ANNs\, we discuss the way they can be utilized to bui ld model-independent algorithms. Moreover\, we have shown that the detecto r parameters providing the best reconstruction of the event parameters do not depend on the Monte-Carlo model of the event\, and\, therefore\, are m ore likely to be optimal in future experiments.\n\nThe authors acknowledge Saint-Petersburg State University for a research project 95413904.\n\nRef erences:\n\n[1] A.A.Baldin\, G.A. Feofilov\, P. Har'yuzov\, and F.F. Valie v\,\n// Nucl. Instrum. Meth.A 2020\, V.958\,P.162154. https://doi.org/10.1 016/j.nima.2019.04.108\n\n[2] https://nica.jinr.ru/\n\n[3] K.A. Galaktiono v\, V.A. Roudnev\, and F.F. Valiev\, Neural network approach to impact par ameter estimation in high-energy collisions using the microchannel plate d etector data\,\n// Moscow University Physics Bulletin 2023\, V. 78\, P. S5 2-S58\n\n[4] Galaktionov K.A.\, Roudnev V.A.\, Valiev F.F. Artificial Neur al Networks Application in Estimating the Impact Parameter in Heavy Ion Co llisions Using the Microchannel Plate Detector Data: Physics of Atomic Nuc lei.\n//Phys. At. Nucl. 2023 V.86(6)\, P.1426-1432. https://doi.org/10.113 4/S1063778823060248\n\n[5] Galaktionov\, K.\, Roudnev\, V.\, Valiev\, F.\, Application of Neural Networks for Event-by-Event Evaluation of the Impac t Parameter\,\n// Physics of Particles and Nuclei 2023 \,V. 54\, P. 446-44 8\n\n[6] Amelin N. S.\, Gudima K. K.\, Toneev V. D. Ultrarelativistic nucl eus-nucleus collisions within a dynamical model of independent quark - glu on strings // Sov. J. Nucl. Phys. 1990. V. 51(6)\, P. 1730-1743\n\n[7] Wer ner\, Klaus and Liu\, Fu-Ming and Pierog\, Tanguy Parton ladder splitting and the rapidity dependence of transverse momentum spectra in deuteron-gol d collisions at the BNL Relativistic Heavy Ion Collider\n// Physical Revie w C 2006\, V. 74\n\n[8] Aichelin\, J. and Bratkovskaya\, E. and Le Fèvre\ , A. and Kireyeu\, V. and Kolesnikov\, V. and Leifels\, Y. and Voronyuk\, V. and Coci\, G. Parton-hadron-quantum-molecular dynamics: A novel microsc opic n-body transport approach for heavy-ion collisions\, dynamical cluste r formation\, and hypernuclei production\n// Physical Review C 2020\, V. 1 01\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4236/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4236/ END:VEVENT BEGIN:VEVENT SUMMARY:Deep Learning Method for Determining EAS Parameters in TAIGA HiSCO RE DTSTART;VALUE=DATE-TIME:20241024T151500Z DTEND;VALUE=DATE-TIME:20241024T153000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4210@cern.ch DESCRIPTION:Speakers: Alexandr Kryukov (SINP MSU)\nThe TAIGA-HiSCORE setup is an array of wide-angle Cherenkov detectors. It contains more than a hu ndred stations located in the Tunka Valley. The effective area of ​​th e setup is about 1 sq. km. The HiSCORE setup is designed to register cosmi c particles and gamma quanta with TeV energies. Each station records a lar ge amount of data\, including the signal arrival time and its amplitude. P rimary data analysis includes the reconstruction of EAS parameters. These are the EAS axis direction\, the type of primary particle\, and its energy . In this report\, we propose using the deep learning method to reconstruc t the EAS parameters recorded by HiSCORE. Using the example of determining the EAS axis direction\, we will consider two approaches based on deep ne ural networks. One of them is based on representing a set of time stamps a s an image and processing such data using convolutional neural networks. T he other approach uses fully connected deep neural networks to solve the r egression problem based on time stamps. Both approaches are shown to yield results comparable to traditional data analysis methods.\n\nhttps://indic o.particle.mephi.ru/event/436/contributions/4210/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4210/ END:VEVENT BEGIN:VEVENT SUMMARY:Design and performance of a prototype gaseous beam monitor with GE M and pixel sensors for the CSR external-target experiment DTSTART;VALUE=DATE-TIME:20241024T143000Z DTEND;VALUE=DATE-TIME:20241024T144500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4250@cern.ch DESCRIPTION:Speakers: Hulin Wang (Central China Normal University)\nA gase ous beam monitor utilizing gas electron multiplier (GEM) and pixel sensors is being developed for the Cooling Storage Ring (CSR) external-target exp eriment (CEE) at Heavy Ion Research Facility in Lanzhou (HIRFL). The beam monitor is mainly used to track each beam particle\, providing an accurate reconstruction of the primary vertex of the collision. Two generations of the pixel sensors (named Topmetal-CEE) were produced\, with the second ge neration having much-improved noise performance over the first one. The re adout electronics includes two chip carrier cards\, two front-end cards\, and a readout and control unit. This talk presents the design and performa nce of two prototype detectors\, featuring two generations of the pixel se nsors\, respectively. In particular\, the results of the tests with heavy- ion beams and laser beams are presented\, showing a spatial resolution of better than 50 $\\mu$m and a time resolution of better than 15 ns. The stu dies demonstrate that the spatial and time resolution of the prototype sat isfies the design specifications.\n\nhttps://indico.particle.mephi.ru/even t/436/contributions/4250/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4250/ END:VEVENT BEGIN:VEVENT SUMMARY:Results of modeling of multi-wire drift chamber used in TREK detec tor DTSTART;VALUE=DATE-TIME:20241024T144500Z DTEND;VALUE=DATE-TIME:20241024T150000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4207@cern.ch DESCRIPTION:Speakers: Uruj Abroo (National Research Nuclear University MEP hI)\nThe world’s largest vertical coordinate detector TREK is assembled at MEPhI\, it consists of 264 drift chambers and covers an area of 250 m$^ 2$. TREK along with Cherenkov water calorimeter NEVOD can estimate the spe cific energy deposit in water of muon component in inclined extensive air showers (EAS). This is necessary to resolve the muon puzzle: the deficit i n the number of cosmic ray muons calculated using hadron interaction model s compared with observations at energies greater than $10^{17}$ eV.\nThe n eed to study the response of TREK to passing muon bundles necessitated mod eling of the multi-wire drift chamber along with its associated amplifier circuit\, the building blocks of TREK. First\, the drift chamber was model ed\, using Geant4 software package which allows simulation of particle pas sing through both the chamber and the entire detector\, including the buil ding. Then the drift chamber’s response was simulated using Garfield++. The time-based current response of this drift chamber model was then trans lated into LTspice\, a program based on spice-technology\, in which the am plifier circuit AMP-04 was simulated. This sequential modeling showed quit e close results\, such as the efficiency of the signal channels was shown to be 98.6±0.2%\, compared with the corresponding experimental measuremen t of 97.9±1.1%. This and similar comparison of other parameters will be p resented at the conference.\nThis sequence of simulations allows modelling of expected results of cosmic ray muon bundle registration\, as well as c ollection of datasets for reconstruction methods based on machine learning .\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4207/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4207/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the ALICE Fast Interaction Trigger for the Run 3 DTSTART;VALUE=DATE-TIME:20241024T140000Z DTEND;VALUE=DATE-TIME:20241024T141500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4238@cern.ch DESCRIPTION:Speakers: Mikhail Sukhanov (INR RAS\, MEPhI)\nThe new hybrid s ystem of the forward detectors called the Fast Interaction Trigger (FIT) w as developed and integrated with the ALICE experimental setup at the LHC d uring LS2 (2019 – 2022). It consists of separate arrays of counters – FT0\, FV0 and FDD\, using different techniques of charged particles detect ion. FIT is the primary online ALICE trigger. It produces low latency (\n\ nhttps://indico.particle.mephi.ru/event/436/contributions/4238/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4238/ END:VEVENT BEGIN:VEVENT SUMMARY:CMS CSC longevity study DTSTART;VALUE=DATE-TIME:20241024T141500Z DTEND;VALUE=DATE-TIME:20241024T143000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4230@cern.ch DESCRIPTION:Speakers: Victor Perelygin (JINR\, Dubna)\nCathode Strip Chamb ers (CSCs) are used in the muon system of the CMS experiment (CERN). There are four muon stations on both endcaps consisting of 540 CSCs operating w ith 40%Ar+50%CO2+10%CF4 gas mixture. The chamber longevity study is partic ularly important in anticipation of the future LHC upgrade into HL-LHC and the scheduled upgrade of the CMS detector which will result in a signific ant background increase in the forward region.\nThe CSC longevity is studi ed with two CMS CSCs ME1/1 and ME2/1 at the Gamma Irradiation Facility (GI F++\, CERN)\, where the charge accumulation rate is about 30 times higher than that at the HL-LHC conditions. Now the accumulated charge for these C SCs is close to the triple HL-LHC charge value. During the irradiation thr ee working gas mixtures were studied: 40%Ar+CO2 with different fractions o f CF4\, namely 10%\, 5% and 2%. The tests did not show any degradations of the chamber performance.\nSearch on reduction or possible replacement of the CF4 in the working gas mixture is also ongoing in a laboratory\, inclu ding the longevity studies with small CSC prototypes.\n\nhttps://indico.pa rticle.mephi.ru/event/436/contributions/4230/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4230/ END:VEVENT BEGIN:VEVENT SUMMARY:DSSD based detection system of the DGFRS-2 setup: design\, results \, developments DTSTART;VALUE=DATE-TIME:20241024T080000Z DTEND;VALUE=DATE-TIME:20241024T081500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4245@cern.ch DESCRIPTION:Speakers: Yury Tsyganov (JINR)\nDouble Side Silicon Detector ( DSSD) based spectrometer of the DGFRS-2 setup has been applied in a differ ent heavy ion induced complete fusion nuclear reactions leading to formati on of superheavy nuclei. Nuclear reactions with $^{48}$Ca\, $^{40}$Ar\, $^ {54}$Cr\, $^{50}$Ti projectiles were used [1\, 2]. Materials of $^{206}$Pb \, $^{nat}$Yb\, $^{232}$Th\, $^{238}$U\, $^{242}$Pu\, $^{243}$Am were used as targets. We report about different stability tests during these long t erm experiment. Radiation damage induced of a change in leakage current values of DSSD detectors are under consideration.Formation of the evaporat ion residue (ER) registered energy spectrum measured with DSSD focal plane detector is presented. Comparison with the PC-based simulation code for t hese spectra generation is made for different cases. A specific of applica tion of “active correlation” real-time method is reported in brief too [3]. Review of the design of the DGFRS-2 spectrometer is preceding the ma in results [4-6].\n\nReferences.\n\n[1] Yu. Ts. Oganessian et. al.\, Phys. Rev. C 106\, (2022) 024612.\n\n[2] Yu. Ts. Oganessian et. al.\, Phys. Rev . C 106\, (2022) L031301.\n\n[3] Yu. S. Tsyganov et al.\, Nucl. Instrument s and Methods Phys. Res. Sect. A Accel. Spectrometers\, Detect. Assoc. Equ ip. 525\, (2004) 213-216.\n\n[4] D. Ibadullayev\, Y.S. Tsyganov\, A.N. Pol yakov\, A.A. Voinov and M.V. Shumeiko\, JINST\, 18 P05010\, 2023.\n\n[5] Y u. S. Tsyganov\, D. Ibadullayev et. al.\, Acta Physica Polonica B Proceedi ngs Supplement. 14\, (2021) 767-774.\n\n[6] D. Ibadullayevet. al.\, Eurasi an Journal of Physics and Functional Materials 6\, (2022) 18-31.\n\nhttps: //indico.particle.mephi.ru/event/436/contributions/4245/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4245/ END:VEVENT BEGIN:VEVENT SUMMARY:Multiple heavy ion injection into NICA Booster DTSTART;VALUE=DATE-TIME:20241024T074500Z DTEND;VALUE=DATE-TIME:20241024T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4214@cern.ch DESCRIPTION:Speakers: Andrei Martynov (JINR)\nThe NICA accelerator complex (JINR) includes a Heavy ion linear accelerator (HILAC) designed for injec tion of heavy ions (with the mass to charge ratio A/Z ≤ 6.35) into the s torage synchrotron-Booster. Commissioning sessions with accelerated Xe28+ ions showed insufficient beam intensity of the required heavy ion beam par ameters for experiments in the Collider. A multiple injection technology h as been developed and is currently being implemented for increase of beam intensity. The paper presents the results of 3-fold and 10-fold injection for heavy ion experiments in the NICA collider.\n\nhttps://indico.particle .mephi.ru/event/436/contributions/4214/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4214/ END:VEVENT BEGIN:VEVENT SUMMARY:Development and implementation of technologies for a new ultracold neutron sources based on superfluid helium DTSTART;VALUE=DATE-TIME:20241024T070000Z DTEND;VALUE=DATE-TIME:20241024T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4243@cern.ch DESCRIPTION:Speakers: Vitalii Liamkin ()\nThe use of ultracold neutrons (U CNs) creates new opportunities for experiments to study the fundamental pr operties of the neutron. The use of superfluid helium for converting cold neutrons into ultracold one is very promising. It is based on the accumula tion of UCNs in superfluid helium due to the properties of this quantum li quid.\n Our UCN source aims to obtain a record UCN density of 2200 cm-3\, which is at least two orders of magnitude higher than the existing UCN den sity level used in experiments in the world at the moment. To obtain the r ecord ultracold neutron density\, unique technologies for creating a new u ltracold neutron source have been developed and implemented: obtaining iso topically pure helium-4 to eliminate the neutron-absorbing isotope 3He\, o btaining and maintaining superfluid helium at a temperature of 1 K under r eactor heat flux conditions\, and manufacturing UCN neutron guides with hi gh reflection intensity to increase the amount of UCN delivered to experim ental facilities. \nBy the end of the project\, we expect to have an exten sive research program in the physics of fundamental interactions establish ed at the new UCN source.\n\nhttps://indico.particle.mephi.ru/event/436/co ntributions/4243/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4243/ END:VEVENT BEGIN:VEVENT SUMMARY:The "Neutron Beta Decay" installation for the reactor PIK DTSTART;VALUE=DATE-TIME:20241024T071500Z DTEND;VALUE=DATE-TIME:20241024T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4240@cern.ch DESCRIPTION:Speakers: Alexey Fomin (NRC "Kurchatov Institute" - PNPI)\nThe neutron instrument complex "Neutron Beta Decay" will be located on the be am of polarized cold neutrons on the GEK-3 N0 channel. The installation is designed to measure the asymmetries of neutron beta decay with a relative accuracy of 0.1%. The basis of the installation is a superconducting sole noid that creates a magnetic field in a uniform region of 0.35 T. Electron s and protons appeared during neutron decay move in a magnetic field along magnetic force lines. To select a given angle of electron emission\, the magnetic mirror effect is used by creating an area with a stronger magneti c field with an induction value of 0.88 T. The area with high field homoge neity is formed by protons\, which can be additionally accelerated by an e lectric field. An electrostatic system is used for this purpose\, which al lows raising the voltage in the decay area to 30 kV. Detectors at the inpu t and output of the neutron beam are used to register electrons and proton s. To detect electrons\, the magnetic field created by the solenoid is def lected downwards to remove electrons from the beam region. A magnetic circ uit mounted under the solenoid will be used for this purpose. To deflect p rotons\, the effect of proton drift in crossed electric and magnetic field s is used. At the input of the solenoid are located: a supermirror polariz er\, a collimator and a spin-flipper. At the output of the solenoid are lo cated: a polarization analyzer\, a neutron detector for beam monitoring\, and a neutron beam trap.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4240/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4240/ END:VEVENT BEGIN:VEVENT SUMMARY:Optical scheme of the neutrino channel with magnetic horns and dip oles at the U–70 accelerator complex DTSTART;VALUE=DATE-TIME:20241024T073000Z DTEND;VALUE=DATE-TIME:20241024T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4226@cern.ch DESCRIPTION:Speakers: Fedor Novoskoltsev ()\nThe optical scheme of the cha nnel based on two magnetic horns for the formation of neutrino beams with a narrow energy spectrum at the U–70 accelerator complex for the P2O exp eriment is considered\, the far detector of which is located at a distance of 2595 km from the end of the decay channel. To select the required mome ntum interval of π-mesons\, we propose using two dipole magnets with oppo site polarity. By rotating the decay part of the channel with respect to t he primary proton beam directed to the target\, we minimize the content of background neutrinos in the main beam of muon neutrinos (antineutrinos) c ompared to a direct channel with magnetic horns. The main calculated chara cteristics of neutrino beams at the far detector of the P2O experiment at an energy of the primary proton beam of 60 GeV are discussed.\n\nhttps://i ndico.particle.mephi.ru/event/436/contributions/4226/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4226/ END:VEVENT BEGIN:VEVENT SUMMARY:Muonography on Kamenny Island in Lake Kubenskoye DTSTART;VALUE=DATE-TIME:20241024T063000Z DTEND;VALUE=DATE-TIME:20241024T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4254@cern.ch DESCRIPTION:Speakers: D. Zainutdinov (Lebedev Physical Institute\, Russian Academy of Sciences\, Moscow\, Russia)\nThe results of a study of the ter ritory and hidden structure of the buildings of the Spaso-Kamenny Preobraz henskii Monastery on Kamenny Island in Lake Kubenskoye are presented. The monastery\, a cultural heritage site\, was founded in 1260. The main purpo se of the study was the basements of a bomb exploded in the mid-1930s Preo brazhenskii Cathedral of Monastery. According to the chronicles\, there ma y be a crypt containing the remains of the disgraced primate of the Russia n Church\, Metropolitan Varlaam\, who died in 1533.\n\nhttps://indico.part icle.mephi.ru/event/436/contributions/4254/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4254/ END:VEVENT BEGIN:VEVENT SUMMARY:Converters of very cold and ultracold neutrons: Monte Carlo simula tion of their properties and specifics of available data libraries and sof tware DTSTART;VALUE=DATE-TIME:20241024T064500Z DTEND;VALUE=DATE-TIME:20241024T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4196@cern.ch DESCRIPTION:Speakers: Khac Tuyen Pham (Moscow Institute of Physics and Tec hnology)\nPham K.T.1\,2\,3*\, Nezvanov A.Yu.3\, Muzychka A.Yu.3\n\n1. Depa rtment of Fundamental and Applied Problems of Microworld Physics\, Landau Phystech School of Physics and Research\, Moscow Institute of Physics and Technology (National Research University)\, 141701\, Institutskiy Pereulok \, 9\, Dolgoprudny\, Moscow Oblast\, Russia\n\n2. Vietnam Atomic Energy In stitute\, 59 Ly Thuong Kiet\, Ha Noi\, Viet Nam\n\n3. Frank Laboratory of Neutron Physics\, Joint Institute for Nuclear Research\, 141980\, Dubna\n* kham.kt@phystech.edu.ru\n\nThe calculation of neutron transport is crucial for the development of neutron sources. The accuracy of these calculation s depends on the quality of the nuclear data libraries used\, which provid e information on neutron cross-sections. There are several nuclear data li braries widely used in the world such as the Evaluated Nuclear Data Files (ENDF)\, the Japanese Evaluated Nuclear Data Library (JENDL)\, and the TAL YS-based Evaluated Nuclear Data Library TENDL\, among others.\n \nIn our r esearch\, we focused on the neutron cross-section library for solid ortho- deuterium (sD2) at 5 K\, which is a promising material for the development of the intense sources of very cold (VCN) and ultracold neutrons (UCN). T he library was developed in ACE format by the Spallation Physics Group at the European Spallation Source\, based on a model developed by J.R. Granad a [1]. The model includes details of the lattice density of states\, molec ular rotations\, and internal molecular vibrations\, as well as elastic an d inelastic processes involving spin-correlation effects.\n\nWe have used a Monte Carlo code and this data library for sD2 at 5 K to calculate the c ross-sections and found that the results are similar to the measured cross -sections. We also simulated the differential inelastic cross-section of e nergy transfers when neutrons interact with sD2\, comparing our results wi th those published by A. Frei [2]. Our results showed agreement with Frei' s results for sub-thermal neutrons in the sD2 converter material.\n \nIn a ddition\, we have also calculated the cross-section of the conversion of V CN with velocities from 50 to 200 m/s using sD2 at 5 K\, liquid deuterium at 20 K\, water ice at 115 K\, and solid mesitylene (C9H12) at 20 K. The w avelength range of incident neutrons for these calculations is from 1 to 2 0 Å.\n\nIn particular\, our investigation has shown that the existing lib raries are insufficient to provide the necessary data for simulations invo lving the production and transport of ultracold neutrons (UCNs). Specifica lly\, the data gap is evident in the energy range from $10^{-2}$ to $10^3$ meV. In the next phase of our research\, we plan to use J.R. Granada's ne utron scattering kernel for sD2 to develop a new cross-section library for Geant4\, with a focus on extending its coverage to the energy range relev ant for UCNs.\n\nReferences\n\n[1] Granada\, J. R. “Neutron scattering k ernel for solid deuterium.” Europhysics Letters 86.6 (2009): 66007.\n\n[ 2] Frei\, A.\, et al. “Understanding of ultra-cold–neutron production in solid deuterium.” Europhysics Letters 92.6 (2011): 62001.\n\nhttps:// indico.particle.mephi.ru/event/436/contributions/4196/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4196/ END:VEVENT BEGIN:VEVENT SUMMARY:Resonant states of muonic three-particle systems with lithium\, he lium and hydrogen nuclei DTSTART;VALUE=DATE-TIME:20241024T080000Z DTEND;VALUE=DATE-TIME:20241024T081500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4182@cern.ch DESCRIPTION:Speakers: Alexey Eskin (Samara University)\nMuonic molecular i ons He-p-µ and Li-p-µ are studied numerically in the variational approac h. Using the complex coordinate rotation method we calculate energies of r esonant states. These molecular systems may be of interest for studying lo w-energy fusion reactions.\n\nhttps://indico.particle.mephi.ru/event/436/c ontributions/4182/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4182/ END:VEVENT BEGIN:VEVENT SUMMARY:Low-energy spectra of nobelium isotopes: Skyrme random-phase-appro ximation analysis DTSTART;VALUE=DATE-TIME:20241024T074500Z DTEND;VALUE=DATE-TIME:20241024T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4167@cern.ch DESCRIPTION:Speakers: Mariia Mardyban ()\nThe low-energy multipole spectru m in isotopes 250-260No is investigated in the framework of fully self-c onsistent Quasiparticle-Random-Phase-Approximation (QRPA) method with Skyr me forces [1\,2]. The representative set of Skyrme parametrizations (SLy5 \, SLy6\, SkM* and SVbas) is applied. The main attention is paid to nuclei 252No and 254No\, where we have most of the experimental spectroscopic in formation [3\,4]. In addition to low-energy one-phonon collective states (lm=20\,22\,30\,31\,32) and their rotational band\, the isomeric states ar e inspected. In general\, a good agreement with the experimental data is o btained. Some K-isomers in these nuclei are inspected. It is shown that\, in the chain 250−260No\, features of 252No and 254No exhibit essential i rregularities caused by a shell gap in the neutron single-particle spectra and corresponding break of the neutron pairing. The low-energy pairing-vi brational Kπ = 0+ state is predicted.\n \n [1] P.-G. Reinhard\, B. Schuet rumpf\, and J. A. Maruhn\, Comp. Phys. Commun. 258\, 107603 (2021).\n\n[2] A. Repko\, J. Kvasil\, V.O. Nesterenko and P.-G. Reinhard\, arXiv:1510.0 1248[nucl-th]. \n\n[3] R.-D. Herzberg and P.T. Greenlees\, Prog. Part. Nuc l. Phys. 61\, 674 (2008).\n\n[4] R.-D. Herzberg\, arXiv:2309.10468[nucl-ex ].\n\n[5] F.L. Bello Garrote et all\, Phys. Lett. B834\, 137479 (2022).\n\ nhttps://indico.particle.mephi.ru/event/436/contributions/4167/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4167/ END:VEVENT BEGIN:VEVENT SUMMARY:THE ROLE OF QUARKS IN NUCLEAR STRUCTURE: ALPHA-CLUSTERING AND NUCL EOSYNTHESIS IN STARS DTSTART;VALUE=DATE-TIME:20241024T073000Z DTEND;VALUE=DATE-TIME:20241024T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4171@cern.ch DESCRIPTION:Speakers: Genis Musulmanbekov (JINR)\nWe propose a quark model of nuclear structure where quark correlations lead to nucleon-nucleon cor relations and arrangement of them into lattice--like structure. The model is based on the quark model of nucleon structure in which valence quarks a re strongly correlated within a nucleon (SCQM) [1]. Nuclei are built by ju nctions of SU(3) color fields of two quarks of neighboring nucleons. Appli cation of the model to larger collections of nucleons reveals the emergenc e of the face-centered cubic (FCC) symmetry at a nuclear level where nucle ons are arranged in alternating spin--isospin layers [2\, 3]. The model of nuclear structure becomes isomorphic to the shell model and\, moreover\, composes the features of the liquid drop and cluster models. In difference with the shell model\, protons and neutrons in our model are strongly cor related. It turns out that building blocks of the nuclear structure are t hree-nucleon (triton and 3He) and four-nucleon (α-cluster) like configura tions. These configurations form inside nuclei virtual triton/3He and α- clusters. We apply the model to analyze nucleosynthesis in stars in the fr amework of α-clustering. It turns out that the gateway for synthesis of e lements heavier than 12C is provided by composition of 5 α- clusters\, th at corresponds to the excited state 20Ne. Excited 20Ne\, than decays to li ghter nuclei C\, N\, O.\nOur approach is an alternative to the 3-α Hoyle state that provides the nucleosynthesis of heavier elements occurring na turally in stars.\n\n\n\n1. G. Musulmanbekov\, in Frontiers of Fundamental Physics\, Ed. B. G. Sidharth\, (Kluwer Acad./Plenum Pub.\, New York\, 200 1)\, p. 109–120. (2004)\; PEPAN Lett.\, Vol.\, № 5\, p. 548-558.\n2. G . Musulmanbekov and N.D. Cook\, Phys.Atom.Nucl. \, 71\, 1226 (2008).\n3. G . Musulmanbekov\, in Exotic Nuclei\, Eds. Yu.Peniozhkevich and Yu. Sobolev \, World Sci.\, Singapore\, 2017\, p. 58\; arXiv:1708.04437v2 [nucl-th].\n \nhttps://indico.particle.mephi.ru/event/436/contributions/4171/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4171/ END:VEVENT BEGIN:VEVENT SUMMARY:Double-humped fission barrier and statistical mechanism of formati on of angular anisotropy of fission fragments DTSTART;VALUE=DATE-TIME:20241024T071500Z DTEND;VALUE=DATE-TIME:20241024T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4174@cern.ch DESCRIPTION:Speakers: A. L. Barabanov (National Research Centre “Kurchat ov Institute”\, Moscow\, Russia\; National Research Nuclear University M EPhI\, Moscow\, Russia)\nFission of heavy nuclei by neutrons at low and in termediate energies (up to 100 MeV) occurs at relatively low angular momen ta\, which has little effect on the dynamics of nuclear deformation. Due t o this\, the anisotropy of the angular distribution of fission fragments r elative to the direction of motion of incident neutrons is determined by t he distribution over the projection K of the spin of the fissioning nucleu s onto the deformation axis. This distribution is formed at the fission ba rrier [1\,2]. At sufficiently high excitation energies\, the distribution over quantum number K is determined by statistical mechanism [3] and depen ds on the deformation and temperature of the nucleus. However\, due to var ious difficulties\, experimental and theoretical studies of the angular an isotropy of fission fragments by neutrons have not received sufficient att ention for a long time. In particular\, there is a lack of understanding o f the role of the the internal and external humps of fission barrier in t he formation of the K-distribution in each fissionable nucleus. Meanwhile\ , the answer to this question depends on various factors that determine th e energy dependence of the nuclear fission cross section for neutrons.\nOv er the past decade\, we have conducted measurements on a neutron time-of-f light spectrometer based on the GNEIS neutron complex at the 1 GeV proton synchrocyclotron of the National Research Centre “Kurchatov Institute” - PNPI (Gatchina) . We have obtained significant data on fission cross se ctions and the angular distributions of fission fragments for low and inte rmediate energy neutrons. In addition\, we have developed new approaches t o the analysis of these characteristics [4\,5]. In this paper\, we demonst rate that in the area of ​​applicability of the statistical model\, it is possible to determine from the angular distribution of fragments which hump of the fission barrier is responsible for the formation of the K-dis tribution.\n\n[1] A. Bohr. Proceedings of the International Conference on the Peaceful Uses of Atomic Energy\, 1955. V. 2. United Nations\, New York \, 1956. P. 151.\n\n[2] A. L. Barabanov\, W. I. Furman. Z. Phys. A 357\, 4 11 (1997).\n\n[3] R. Vandenbosch\, J. R. Huizenga. Nuclear Fission. New Yo rk\, Academic Press\, Inc.\, 1973.\n\n[4] A. S. Vorobyev et al. Phys. Rev. C 108\, 014621 (2023).\n\n[5] A. S. Vorobyev et al. Eur. Phys. J. A 60\, 117 (2024).\n\nhttps://indico.particle.mephi.ru/event/436/contributions/41 74/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4174/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of the structure of the lowest quadrupole excitation s in Ge isotopes DTSTART;VALUE=DATE-TIME:20241024T070000Z DTEND;VALUE=DATE-TIME:20241024T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4178@cern.ch DESCRIPTION:Speakers: Evgenii Mardyban (Joint institute of nuclear researc h)\nAt present\, a lot of experimental information has been accumulated on the structure of low-lying excited states in Ge isotopes. Interest in the se nuclei is due to the fact that with an increase in the number of neutro ns there is a transition between spherical and deformed forms of the nucle us that determine their structure. On the other hand\, microscopic calcula tions show that Ge isotopes are soft in relation to triaxial deformation. In this report\, we analyze the properties of low-lying 2+ states in isoto pes of 70-88Ge. Calculations were carried out by constructing and diagonal ization of the collective quadrupole Hamiltonian. The surfaces of potentia l energy and mass parameters were calculated in the relativistic mean fiel d model with two parameterization of the energy density functional: PC-PK1 and NL3. The results of the calculations are compared with the experiment al data and the results obtained within other approaches.\n\nhttps://indic o.particle.mephi.ru/event/436/contributions/4178/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4178/ END:VEVENT BEGIN:VEVENT SUMMARY:Relations of isotope yields as an indicator of neutron fluxes in a rtificial rapid process DTSTART;VALUE=DATE-TIME:20241024T064500Z DTEND;VALUE=DATE-TIME:20241024T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4180@cern.ch DESCRIPTION:Speakers: Vladimir Lyashuk (Institute for Nuclear Research of the Russian Academy of Sciences)\nThe creation of heavy isotopes under ext remal pulsed neutron fluences (of $10^{24}$ n/cm$^2$ units) of artificial nucleosynthesis is investigated by means of the dynamical model taking int o account the temperature decrease at the matter expansion. The first tim e the creation of isotopes with neutron excess up to mass A = 255 was obta ined and discovered in the Mike experiment [1]. An intensive (n\,γ)-activ ation of the irradiated 238U target ensures the creation of neutron-rich i sotopes up to 257Fm. The rapid process is the consistent multiple neutron capture in the target (manufactured from the 238U or more heavy/mixture is otopes as 232Th\, 237Np\, 238U\, 242Pu\, 243Am). Creation of transuranium isotopes were investigated during the Plowshare program and some next nucl ear tests: Anacostia\, Kennebec\, Par\, Barbel\, Tweed\, Cyclamen\, Kankak ee\, Vulcan and Hutch [2-5].\nIn the realized model of the nucleosynthesis (realized during the short time exposition - ~$10^{-6}$ s) it were consid ered the sequential (n\,γ)-neutron captures by mono isotope 238U target a nd binary (238U + 239Pu)-variant for case of 239Pu injection [6\,7]. The m odel includes the temperature decrease during the adiabatic expansion with index γ = 1.5 at the initial temperature ~20 keV and linear velocity ~19 0 km/s. Here we simulated the isotope yields for Mike\, Anacostia\, Barbel \, Par\, Vulcan and Kankakee experiments. The obtained results indicated o n the approximately linear dependence for relations of the isotope yields relative to the obtained neutron fluence [8]. In the work we considered t he pairs of neighboring isotopes with atomic masses A=245 and 244\, A=246 and 245\, A=247 and 246. The relation 246/245 (i.e.\, yields with masses A =246 and 245) depending on the fluences is the most strong demonstrator of the linear dependence. The most strong confirmation of the roughly linear dependence was obtained for the pure 238U target.\n\nReferences\n\n[1] Do rn DW. Phys Rev 1962\;126:693\n\n[2] United States Nuclear Tests. July 194 5 through September 1992. DOE/NV-209-REV 16. September 2015.\n\n[3] Hoff R W\, Dorn DW. Nucl Sci Eng 1964\;18:110.\n\n[4] Dorn DW\, Hoff RW. Phys Rev Lett 1965\;14:440. \n\n[5] Balagna JP\, et al. Los Alamos Radiohemistry G roup. Phys Rev Lett 1965\;14:962.\n\n[6] Lutostansky YuS\, Lyashuk VI\, Pa nov IV. Bull Russ Acad Sci: Phys 2010\;75:533.\n \n[7] Lyashuk VI. Bull Ru ss Acad Sci: Phys 2012\;76:1182–6. \n\n[8] Lyashuk V.I.\, Results in Phy sics 2024\; 56:107234.\n\nhttps://indico.particle.mephi.ru/event/436/contr ibutions/4180/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4180/ END:VEVENT BEGIN:VEVENT SUMMARY:Charge radii and beta-decay properties of heavy Hg and Pt isotopes . DTSTART;VALUE=DATE-TIME:20241024T063000Z DTEND;VALUE=DATE-TIME:20241024T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4179@cern.ch DESCRIPTION:Speakers: Ivan Borzov (National Research Centre Kurchatov inst itute)\nI.N. Borzov\, 1\, 2\n\n1) National Research Centre”Kurchatov Ins titute”\, Moscow\, Russia\n \n2) Bogolubov Laboratory of Theoretical Phy sics\, JINR\, Dubna\, Russia \n\nThe charge radii\, beta decay half-lives (T1/2) and delayed neutron emission probabilities (Pn) are calculated in t he chains of heavy Hg and Pt isotopes. The self-consistent Finite Fermi Sy stems theory (TFFS) with the Fayans energy-density functional DF3-a [1] is used. It describes well the experimental spectra of single-quasiparticle levels in isotopes near Z=82\, N >126. The isotopic dependence of the char ge radii has a characteristic kink at crossing of the neutron shell N = 12 6. The kink indices $\\xi$ = $ \\delta (128/126)/ \n \\delta (126/124)$\ , measured in [2\,3]\, are reproduced in the present calculations due to t he density gradient pairing and surface terms of DF3-a. In contrast\, with in the relativistic approach [4] a good description of the radii is achiev ed mostly due to an inversion of 2ng9/2 and 1ni11/2 levels which exists in the family of relativistic density functionals used in [4] but does not s how up in the experimental spectra. Half-lives and Pn values are compared with the compilation of experimental data [5] and with relativistic RHB+RQ RPA calculations [6]. Importantly\, an inversion of 2ng9/2 and 1ni11/2 lev els\, does not allow one to simultaneously describe the experimental charg e radii and beta decay rates in [4\,6]. However\, based on the Fayans func tional such a description is possible.\n\n1. I.N. Borzov\, S.V. Tolokonnik ov\, Physics of Atomic Nuclei 87\, 423 (2024). \n2. Z. Yue\, A. N. Andrey ev\, A. E. Barzakh \, I. N. Borzov \, J. G. Cubiss et.al. Physical Review C 110 (2024)\, accepted. \n3. Y. Hirayama for KISS Collaboration. Phys.Rev . C 106\, 034326 (2022)\; Eur. Phys. J. Spec. Top. 233\, 1209–1223 (2024 ). \n4. U.C. Perera\, A.V. Afanasjev\, P. Ring\, Phys. Rev. C 104\, 064313 (2021)\n5. Reference Database for Beta-Delayed Neutron Emission. https: //www-nds.iaea.org/beta-delayed-neutron/database.html \n6. T. Marketin\, L . Huther\, and G. Martínez-Pinedo. Phys. Rev. C 93\, 025805 (2016).\n\nht tps://indico.particle.mephi.ru/event/436/contributions/4179/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4179/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the 6Li low-lying excited states DTSTART;VALUE=DATE-TIME:20241023T080000Z DTEND;VALUE=DATE-TIME:20241023T081500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4169@cern.ch DESCRIPTION:Speakers: Alla Demyanova (NRC Kurchatov Institute)\n6He is one of the simplest nuclei with a halo in the ground state 0+\; its study has received significant theoretical attention [1]. In [2]\, an assumption wa s made about a halo-like structure in the isobar-analog state of the 3.563 -MeV\, 0+ 6Li state. This structure is a spatially extended halo-like stru cture with an alpha particle core and a proton and neutron surrounding it. One of the last theoretical results is the calculations within the ab ini tio NCSM (no-core shell model) [3]. Calculations showed that the radius of the ground state of 6Li\, within the error limits\, coincides with the ra dius of the 3.56 MeV state of 6Li.\nOur group is studying the 6Li nucleus\ , especially its second excited 3.563-MeV\, 0+ state for a long time. One of the first results was the Modified diffraction model (MDM) application [4] to existing literature data. The literature differential cross section s for inelastic scattering of 3He + 6Li with excitation of the 2.19 MeV st ate\, 3+ at energies of 34 and 72 MeV and 3.56 MeV\, and 0+ state at energ ies of 24.6 and 27 MeV were analyzed. It was shown that the radius of the 2.19 MeV\, 3+ state\, within errors\, coincides with the radius of the gro und state\, and the radius of the 3.56 MeV\, 0+ state is 2.5 ± 0.2 fm [4] and\, within errors\, coincides with the radius of 6He\, which allows for the possibility of the presence of a halo (proton-neutron\, and in some w orks called tango-halo) [5]. The obtained value is less than the previousl y predicted radius of this state of 2.73 fm [2].\nDuring last year’s we are adopting “Distorted Wave Born Approximation” (DWBA) to make some q ualitative estimations on radii of 6Li excited states. Two new experiments were done: 1) 7Li (d\, t)6Li experiment was performed on the deuteron bea m of the U-150M cyclotron at the Institute of Nuclear Physics (Almaty\, Re public of Kazakhstan) at an energy of 14.5 MeV\; 2) 10B(7Li\,6Li)11B exper iment was performed on the 7Li beam of the U-400 accelerator beam of the F LNR JINR\, Dubna at energy of 58 MeV. The angular distributions for the gr ound and first excited states of 6Li were obtained. The experimental data were analyzed within the framework of the DWBA. We obtained radial depende nces of the form factors and the ANC values for 6Lig.s and 6Li (3.56 MeV) states. The obtained values of the ANC for the 6Lig.s. and 6Li(3.56 MeV) s tates are similar to those in the literature. This fact confirms correctne ss of our DWBA analysis. Comparison of the radial dependences of form fact ors shows that the wave function of the 6Li nucleus in the 6Li (3.56 MeV) state has increased spatial dimension compared to the 6Lig.s. state.\n\n[1 ] Y. Suzuki\, Nucl. Phys. A 528\, 395 (1991).\n\n[2] K. Arai et al.\, Phys . Rev. C 51\, 2488 (1995).\n\n[3] D. M. Rodkin\, Yu. M. Tchuvil’sky\, JE TP Letters\, 118 (3)\, 153 (2023).\n\n[4] A.S. Demyanova et al.\, “Possi ble existence of neutron-proton halo in 6Li” KnE Energy & Physics\, 1\, DOI 10.18502/ken.v3i1.1715 (2018). \n\n[5] I.N. Izosimov\, Phys. At. Nucl. 80\, 867 (2017).\n\nhttps://indico.particle.mephi.ru/event/436/contributi ons/4169/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4169/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the $^8$Li low-lying excited states DTSTART;VALUE=DATE-TIME:20241023T081500Z DTEND;VALUE=DATE-TIME:20241023T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4170@cern.ch DESCRIPTION:Speakers: Andrey Danilov (NRC Kurchatov Institute)\nIn the A=8 multiplet\, a halo was first discovered in $^8$B in [1] based on the incr eased quadrupole moment. It was shown that the halo structure is core $^7$ Be and has a valence proton. It should be noted that the halo was discover ed despite the presence of both the Coulomb and centrifugal barriers. In [ 2]\, using total cross sections\, the presence of a proton halo in $^8$B w as confirmed\, and the root-mean-square radius R$_{rms}$ = 2.58 fm and the halo radius R$_h$ = 4.24 fm were determined. However\, the latest researc h indicates that $^8$B looks like a normal heavy ion [3]. All experiments confirm a narrow width of the longitudinal momentum distribution of the co re\, and an obvious tail structure in the density distribution.\n\nThis im plies that mirror nuclei $^8$Li will be an interesting candidate for explo ring the formation of the halo structure. Many calculations have been made to investigate its structure\, such as ab initio calculations\, the clust er model\, the shell model\, the Hartree-Fock method\, and the relativisti c mean field. In fact\, there is still a large ambiguity to explain the st ructure of $^8$Li theoretically due to the lack of experimental constraint s. Although some of these methods could reproduce the radius or the quadru pole moment for $^8$Li well\, none of them could well describe both 8Li an d 8B simultaneously. \n\nMeanwhile\, several groups have tried to determin e its structure directly by deducing its matter radius or density distribu tion through the measurement of cross sections. In [4] using total cross s ections\, it is stated that there is no halo in $^8$Li. In [5] $^8$Li was found to have a skin-like structure by comparing with the Li isotope and i ts mirror $^8$B. However\, the structure of the $^8$Li nucleus still canno t be clearly concluded\, especially for excited states.\n\nWe applied Modi fied diffraction model (MDM) to existing literature data on d+$^8$Li and $ ^8$Li+$^{12}$C scattering and obtained radii of low-lying excited states o f $^8$Li\, practically similar as for g.s.\n\nhttps://indico.particle.meph i.ru/event/436/contributions/4170/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4170/ END:VEVENT BEGIN:VEVENT SUMMARY:Double-hit experimental approach in studies of the multibody decay s of heavy nuclei. DTSTART;VALUE=DATE-TIME:20241023T074500Z DTEND;VALUE=DATE-TIME:20241023T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4176@cern.ch DESCRIPTION:Speakers: Z.I. Goryainova (JINR)\nIn our previous publications [1–3]\, a very specific effect\, unknown in the past\, was discussed\, namely a break-up of the fission fragment while it passes through a solid- state foil. The fraction of the fragments which undergo the break-up is su pposed to be born in the shape isomer states. The bulk of the results were obtained in the frame of the so-called missing mass experimental method w hen only one of two partners of the break-up is detected by the spectromet er. The difference between the total mass of the detected fragments and th e mass of the mother system serves a sign of at least ternary decay. Alter native\, so called” double-hit” approach lets obtain more direct infor mation about the process. By definition\, the double-hit registration app roach means that two fragments were detected in the same PIN diode during one registration gate of 200 ns length. If a minimum time interval betwee n their time stamps is less than 30 ns a pile-up of the signals take place . Restoring original signals from pile-up is discussed.\n\nhttps://indico. particle.mephi.ru/event/436/contributions/4176/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4176/ END:VEVENT BEGIN:VEVENT SUMMARY:Manifestation of the N=32\, 34 subshell closures in the ternary de cays of heavy nuclei. DTSTART;VALUE=DATE-TIME:20241023T073000Z DTEND;VALUE=DATE-TIME:20241023T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4175@cern.ch DESCRIPTION:Speakers: Yuri Pyatkov ()\nIn our previous publications [1-4] we presented experimental evidences of rare ternary decay mode of low exci ted heavy nuclei. Essential feature of this process is that some of the fi ssion fragments (FFs) born during binary fission undergo a break-up\, whil e they pass a solid-state foil. This break-up is delayed and occurs after the binary fission of the mother system. It is reasonable to think of such specific FFs as formed in the shape-isomer states. The break-up is due to the FF inelastic scattering in the foil medium. Strong indication was obt ained of clustering of the mother system at the stage of binary fission an d clustering of the intermediate fragment which undergoes further break-up . Deformed magic and semi-magic nuclei play role of clusters. We especiall y discuss the manifestation of the N=32\, 34 subshell closures in the ligh t products of the break-up.\n\nReferences\n\n1. Yu.V. Pyatkov et al.\, Eur . Phys. J. A 45\, 29 (2010).\n\n2. Yu.V. Pyatkov et al.\, Eur. Phys. J. A 48\, 94 (2012).\n\n3. Yu.V. Pyatkov et al.\, Phys. Rev. C 96 (2017) 064606 . \n\n4. Yu. V. Pyatkov et al.\, Physics of Atomic Nuclei\, 85\, 763 (2022 )\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4175/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4175/ END:VEVENT BEGIN:VEVENT SUMMARY:Formation of the multi-neutron systems 2n and 3n in the reactions of stopped pion absorption DTSTART;VALUE=DATE-TIME:20241023T071500Z DTEND;VALUE=DATE-TIME:20241023T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4181@cern.ch DESCRIPTION:Speakers: Boris Chernyshev ( National Research Nuclear Univers ity MEPhI)\nThe formation of the multi-neutron systems 2n and 3n was studi ed in the reactions of stopped pion absorption by 9Be nuclei. Measurements were carried out at low energy pion channel of LANL using two-arm multila yer semiconductor spectrometer. The bound states of 2n and 3n have not bee n found. In the missing mass spectrum of the reaction 9Be(pi-\, t4He)\, a peak was observed near the threshold\, which is due to the formation of th e s-wave virtual state of the dineutron. Indications of the existence of two states of the 3n with resonant parameters (Er ≈ 5 MeV\, Г \n\nhttp s://indico.particle.mephi.ru/event/436/contributions/4181/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4181/ END:VEVENT BEGIN:VEVENT SUMMARY:Peculiarities of the momentum spectra of light fragments at 56Fe f ragmentation with incident energy of 230 MeV/nucleon. DTSTART;VALUE=DATE-TIME:20241023T070000Z DTEND;VALUE=DATE-TIME:20241023T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4183@cern.ch DESCRIPTION:Speakers: A.A. Kulikovskaya (NRC Kurchatov Institute)\nNew exp erimental results were obtained for the fragmentation of 230 MeV/nucleon 5 6Fe on 9Be\, 27Al\, 64Cu targets. The experiment was carried out on the FR AGM setup at TWA heavy ion facility. The detector FRAGM allows to measure the fragment momentum with high accuracy at an angle of 3.5 degrees [1\,2] . It was found that the momentum distribution of light fragments in the re st frame of the incident nucleus has a double-humped structure\, which is not typical for fragmentation processes. This paper contains a phenomenolo gical description of the magnitude of momentum peak splitting\, which is e specially manifested in proton spectra and decreases for heavier fragments . Experimental results are compared with data obtained on the FRS-GSI setu p [3] and with the predictions of different models of nucleus-nuclear coll isions. The possible source of this phenomenon is connected with coulomb e ffects in the asymmetric fission.\n\nBibliography\n\n[1] B.M. Abramov et a l.\, Phys.Atom.Nucl. 85\, 1541 (2022).\n\n[2] A.A. Kulikovskaya et al.\, P hys.Atom.Nucl. 85\, 466 (2022).\n\n[3] P. Napolitani et al.\, Phys.Rev. C 70\, 054607 (2004).\n\nhttps://indico.particle.mephi.ru/event/436/contribu tions/4183/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4183/ END:VEVENT BEGIN:VEVENT SUMMARY:Experimental study of the interaction of the proton and deuteron w ith the atomic nuclei of lithium and boron DTSTART;VALUE=DATE-TIME:20241023T064500Z DTEND;VALUE=DATE-TIME:20241023T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4184@cern.ch DESCRIPTION:Speakers: Georgii Ostreinov (Budker Institute of Nuclear Physi cs)\nThe interaction of deuteron and proton beams with light nuclei is cha racterized by a wide variety of reactions of interest for both technical a nd fundamental applications.\nThe reaction $^7Li(d\,n)α$ is characterized by a high neutron yield and high neutron energy (13.125 MeV)\, which is r elevant for conducting radiation tests of modern materials and equipment.\ nFor the reaction $^{11}B(p\, α)αα$\, reliable knowledge of the cross s ection is relevant for proton therapy of cancer\, the implementation of th e boron-proton fusion reaction in thermonuclear energy and the study of th e mechanism of primary nucleosynthesis.\nDespite the long-standing interes t in these processes\, the experimental data on cross-sections vary greatl y among different authors\, and for a number of reactions\, cross-section values ​​are not available in the databases.\nAt the Institute of Nucl ear Physics of the Siberian Branch of the Russian Academy of Sciences\, at the VITA accelerator neutron source\, the cross-sections of the following reactions were measured experimentally in the energy range of 0.3-2.3 MeV :\n - $^6Li(d\,α)α$\, $^6Li(d\,p)^7Li$\, $^6Li(d\,p)^7Li^*$\,$^7Li(d\, α)^5He$\, $^7Li(d\,nα)α$\, $^{10}B(d\,α_0)^8Be$\, $^{10}B(d\,α_1)^8Be ^*$\, $^{10}B(d\,p_2)^9Be^*$\, $^{11}B(d\,α_0)^9Be$\, $^{11}B(d\,α_2)^9B e^*$\n - $^{11}B(p\,α)αα$\, $^{11}B(p\,α_0)^8Be$\, $^{11}B(p\,α_1)^8 Be^{**}$\n\nThe study was supported by the Russian Science Foundation gran t No. 19-72-30005\, https://rscf.ru/project/19-72-30005/.\n\nhttps://indic o.particle.mephi.ru/event/436/contributions/4184/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4184/ END:VEVENT BEGIN:VEVENT SUMMARY:Alpha-particle states in relativistic nuclear fragmentation DTSTART;VALUE=DATE-TIME:20241023T063000Z DTEND;VALUE=DATE-TIME:20241023T064500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4186@cern.ch DESCRIPTION:Speakers: Andrei Zaitsev ()\nEnsembles of He and H isotopes ca n be studied with unique completeness and resolution in nuclear emulsion l ayers longitudinally exposed to relativistic nuclei [1\,2]. Determination of the invariant mass of their pairs or triplets by emission angles in the velocity conservation approximation is sufficient to identify a number of unstable states – $^8$Be(0$^+$)\, $^8$Be(2$^+$)\, $^9$B\, $^{12}$C(0$^+ _2$)\, $^{12}$C(3$^-$)\, $^6$Be.\n\nThe BECQUEREL experiment [3\,4]\, usin g this approach\, is aimed at searching for the α-particle Bose-Einstein condensate (αBEC)\, an unstable of S-wave α-particle state. $^8$Be(0$^+$ ) is associated with 2αBEC\, and $^{12}$C(0$^+_2$) or the Hoyle state wit h 3αBEC. In the relativistic fragmentation of heavy nuclei\, an enhanceme nt of $^8$Be\, $^9$B and $^{12}$C(0$^+_2$) is detected\, suggesting their synthesis in the fusion of associated α-particles. The focus of the searc h is the 4αBEC state of $^{16}$O(0$^+_6$) at 660 keV above the 4α thresh old\, decaying into α$^{12}$C(0$^+_2$) or 2$^8$Be. In this context\, the status of the analysis of α-particle fragmentation in a nuclear emulsion exposed to $^{84}$Kr nuclei at 950 MeV per nucleon is presented. Secondary stars produced by relativistic neutrons are observed in the nucleus fragm entation cone [4]. The neutron average energy in the parent nucleus system is estimated to be 1.3 MeV [5].\n\nThe αBEC search leads to the study of nuclear matter in the region of temperature and density from red giants t o supernova. It is characterized by the ratios of $^{1\,2\,3}$H and $^{3\, 4}$He. Nuclear emulsion layers exposed to heavy nuclei of several GeV per nucleon at the NICA accelerator complex are optimal for identifying H and He isotopes by multiple scattering\, searching for unstable states\, and a ssessing neutron accompaniment. An exposure to $^{124}$Xe nuclei of 3.8 Ge V per nucleon\, performed at the NICA/Nuclotron accelerator complex\, allo ws the use of proven approaches. Parameters of the beam are determined usi ng the CR-39 track detector by direct crater counting on the Olympus BX63 microscope.\n\n[1] P.I. Zarubin\, Lect. Notes in Phys. 875\, Clusters in N uclei\, Volume 3. Springer Int. Publ.\, 51 (2013)\; arXiv: 1309.4881.\n\n[ 2] D.A. Artemenkov et al.\, Eur. Phys. J. A 56 250 (2020)\; arXiv: 2004.10 277.\n\n[3] A.A. Zaitsev et al.\, Phys. Lett. B 820 136460 (2021)\; arXiv: 2102.09541.\n\n[4] D.A. Artemenkov et al.\, Phys. At. Nucl. 85\, 528 (202 2)\; arXiv: 2206.096.\n\n[5] A.A. Zaitsev et al.\, Phys. At. Nucl. 86\, 1 101 (2023)\; arXiv: 2307.16465.\n\nhttps://indico.particle.mephi.ru/event/ 436/contributions/4186/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4186/ END:VEVENT BEGIN:VEVENT SUMMARY:Quartet-metric gravity and scalar graviton dark holes DTSTART;VALUE=DATE-TIME:20241025T151500Z DTEND;VALUE=DATE-TIME:20241025T153000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4166@cern.ch DESCRIPTION:Speakers: Oleg Zenin (NRC KI -- IHEP)\nIn the framework of the quartet-metric gravity [1] the so called ``dark holes'' combining a centr al black hole and a peripheral scalar graviton dark halo are considered. I t is shown that the dark holes can quite naturally explain asymptotically flat rotation curves\, otherwise explained by presence of dark matter in g alaxies. Possibilities of further modification of basic dark hole solution s are discussed\, in order to apply them to modeling of realistic cosmic s tructures.\n\n[1] Yu.F. Pirogov\, ``Multiscalar-Metric Gravity: Cosmologic al Constant Screening and Emergence of Massive-Graviton Dark Components of the Universe''\, Grav. Cosmol. 28\, 263 (2022)\; arXiv:2105.09897 [gr-qc ].\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4166/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4166/ END:VEVENT BEGIN:VEVENT SUMMARY:Viscosity in an accelerated relativistic medium from the Unruh eff ect vs string theory bound DTSTART;VALUE=DATE-TIME:20241025T143000Z DTEND;VALUE=DATE-TIME:20241025T144500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4164@cern.ch DESCRIPTION:Speakers: Dmitriy Lapygin (Southern federal university)\nThis project investigates the dissipative properties of an accelerated relativi stic medium and their connection to the Unruh effect and effective black h ole radiation. The thermodynamic properties in spaces with a horizon is on e of the most discussed in modern fundamental physics. A notable 2005 stri ng theory limit sets a minimum shear viscosity. We calculated viscosity in an accelerated frame for a photon medium\, where no holographic descripti on exists\, treating the black hole horizon as a membrane of finite thickn ess. While the average viscosity\nmeets the string theory limit\, local va lues are described by a universal function that is independent of particle spin. Specifically\, on the membrane surface\, the ratio of local viscosi ty to local entropy is half the string theory limit. Importantly\, this re sult is gauge-independent\, with the positive contribution from gauge fixi ng exactly canceling the negative contribution from Faddeev-Popov ghosts.\ n\nhttps://indico.particle.mephi.ru/event/436/contributions/4164/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4164/ END:VEVENT BEGIN:VEVENT SUMMARY:Schwarzschild self-consistent modeling of the Fornax dSph galaxy u sing line-of-sight velocity distribution. DTSTART;VALUE=DATE-TIME:20241025T154500Z DTEND;VALUE=DATE-TIME:20241025T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4138@cern.ch DESCRIPTION:Speakers: Galina Shchelkanova (Kurchatov Institute)\nDwarf sph eroidal (dSph) satellites of the Milky Way (MW) are the\nmostly dark matte r (DM) dominated systems. Their dynamical parameters\nsuch as line-of-sigh t (LOS) velocities are measured very accurately\, so they\nare very good p robes of DM properties. We have constructed nearly\nself-consistent stars- halo model of the dSph Fornax galaxy using \nSchwarzschild orbit-superposi tion code of the AGAMA software library. \nThis is a step forward after pr evious studies\nof this object based on more approximate Jeans equation ap proach.\nThe code fits Gauss–Hermite (GH) expansion coefficients of the LOS velocity\ndistribution for each apperture of the galaxy to their obser vational estimates. \nWe use the latest data on the stellar velocities and their probability \nmembership to estimate the GH coefficients of the obs ervational data\nby the AGAMA code.\n\nhttps://indico.particle.mephi.ru/ev ent/436/contributions/4138/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4138/ END:VEVENT BEGIN:VEVENT SUMMARY:Tidal force in Newtonian gravity DTSTART;VALUE=DATE-TIME:20241025T153000Z DTEND;VALUE=DATE-TIME:20241025T154500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4158@cern.ch DESCRIPTION:Speakers: Sameer Malik (Indian Institute of Technology Kharagp ur)\nIn this presentation\, I will delve into the behavior and impact of t idal forces within the realm of Newtonian gravity. I will provide concrete examples that illustrate solutions and outcomes by analyzing the Newtonia n deviation equation. Furthermore\, I will extensively explore the conditi ons under which tidal forces can exhibit compressive or disruptive effects by leveraging different model density profiles. Lastly\, I will rigorousl y analyze the stability criteria for two density profiles\, namely the Pow er Law and Sersic\, using the Jog mass and length conditions in the presen ce of tidal forces\, and draw comparisons to the Jeans mass and length in their absence.\n\nhttps://indico.particle.mephi.ru/event/436/contributions /4158/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4158/ END:VEVENT BEGIN:VEVENT SUMMARY:Non-Gaussianities in the bouncing Universe model DTSTART;VALUE=DATE-TIME:20241025T150000Z DTEND;VALUE=DATE-TIME:20241025T151500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4146@cern.ch DESCRIPTION:Speakers: Maxim Kotenko ()\nWe acquired and analyzed the primo rdial bispectrum and the corresponding non-gaussianity in the particular m odel of the bouncing universe within the framework of the Horndeski theory . The analytical shape function of the bispectrum did not correspond to th e widely used local\, equilateral of orthogonal shapes. The non-gaussianit y parameter is compatible with the current observational bounds even unde r the restrictions of the regime where the background evolution and pertu rbations are legitimately described within classical field theory and wea kly coupled quantum theory at all times.\n\nhttps://indico.particle.mephi. ru/event/436/contributions/4146/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4146/ END:VEVENT BEGIN:VEVENT SUMMARY:Cosmological Constant Suppression in Non-Stationary Scalar Covaria nt State DTSTART;VALUE=DATE-TIME:20241025T144500Z DTEND;VALUE=DATE-TIME:20241025T150000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4154@cern.ch DESCRIPTION:Speakers: Asya Aynbund (MIPT)\nWe study spatial-temporal struc ture of quantum fluctuations in stress-energy tensor of zero-point modes o f scalar field in order to formulate relativistically covariant model. The model describes a vacuum contribution to cosmological constant in non-sta tionary state of finite volume. Bare and effective mean values of vacuum e nergy are compared.\n\nhttps://indico.particle.mephi.ru/event/436/contribu tions/4154/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4154/ END:VEVENT BEGIN:VEVENT SUMMARY:Superfluid Stars and the Dawn of Quantum Astrophysics DTSTART;VALUE=DATE-TIME:20241025T141500Z DTEND;VALUE=DATE-TIME:20241025T143000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4162@cern.ch DESCRIPTION:Speakers: Konstantin Zloshchastiev (Durban University of Techn ology)\nAstrophysics traditionally deals with phenomena and objects in whi ch quantum effects are not expected to be important or even significant – too large\, too massive\, too hot. Therefore\, does it make sense to s peak about “quantum astrophysics” as a separate discipline\, and what would its key features and ideology be?\n\nWe consider a general relativis tic model of a self-interacting complex scalar field with logarithmic nonl inearity motivated by studies of laboratory superfluids and Bose-Einstein condensates. Spherically-symmetric gravitational equilibria are shown in t his model\, which do not have event horizons but which are regular\, singu larity-free and asymptotically flat. They can be thus interpreted as compa ct stars whose stability against gravitational collapse is enhanced not on ly by the Heisenberg uncertainty principle but also by the property of sup erfluidity itself\, their ``darkness'' comes naturally as a result of supp ressed dissipative excitations. Such objects do not obey any absolute uppe r mass limit of a Tolman-Oppenheimer-Volkoff type\, while their relativist icity and effective compactness values are comparable to those of black ho les. Their spatial density distribution drops abruptly (at the Gaussian-li ke rate)\, which can be mistaken in realistic astronomical observations fo r the presence of an exact material surface.\n\nWe therefore present logar ithmic superfluid stars as dark compact objects and black hole mimickers. Their existence would be a serious argument towards accepting quantum astr ophysics as a next step in understanding phenomena occurring in supermassi ve objects and high-energy phenomena observed in astronomy.\n\nhttps://ind ico.particle.mephi.ru/event/436/contributions/4162/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4162/ END:VEVENT BEGIN:VEVENT SUMMARY:Formation and evolution of complex soliton structures in the early Universe DTSTART;VALUE=DATE-TIME:20241025T140000Z DTEND;VALUE=DATE-TIME:20241025T141500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4147@cern.ch DESCRIPTION:Speakers: Boris Murygin ()\nThe formation of composite soliton s produced by scalar fields without thermal phase transitions in the early Universe is considered. We present numerical simulations of the formation and evolution of soliton structures at the post-inflationary stage. The r ealistic initial conditions are obtained through the simulation of multipl e quantum fluctuations during the inflation epoch. The initial field distr ibutions allow to form local soliton clusters in the early Universe withou t the need for the thermal production of a soliton network throughout the Universe. We find that in three-dimensional space\, the nontrivial composi te field structures are formed in the form of soliton foam\, consisting of closed domain walls\, domain walls bounded by cosmic strings\, and scalar field radiation. The possible cosmological implications of the soliton fo am are discussed.\n\nhttps://indico.particle.mephi.ru/event/436/contributi ons/4147/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4147/ END:VEVENT BEGIN:VEVENT SUMMARY:Formation of dark atoms DTSTART;VALUE=DATE-TIME:20241025T134500Z DTEND;VALUE=DATE-TIME:20241025T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4161@cern.ch DESCRIPTION:Speakers: Danila Sopin ()\nNew stable heavy particles with eve n negative charge $X^{-2n}$ arise in several extensions of the Standard Mo del. The Thomson-like neutral bound states $XHe$ called dark atoms are the dark matter candidates. However\, at present there is no comprehensive de scription of their formation at early stages of the cosmological evolution . The process of the $X^{-2n}$ excess generation depends significantly on a model\, pending on the electroweak properties of $X$-particles. If these particles have nontrivial $SU(2)$ electroweak charges\, such excess shoul d be balanced with baryon asymmetry by sphaleron transitions.The successiv e development of the nucleosynthesis\, modified by the presence of dark at oms\, is determined by their nuclear interaction with the baryonic matter. We approach these open questions of dark atom cosmology in the present wo rk.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4161/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4161/ END:VEVENT BEGIN:VEVENT SUMMARY:Ultralight ALP dark matter and 21 cm absorption signals in new phy sics DTSTART;VALUE=DATE-TIME:20241025T133000Z DTEND;VALUE=DATE-TIME:20241025T134500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4149@cern.ch DESCRIPTION:Speakers: Chitta Ranjan Das (BLTP\, JINR)\nA hypothetical part icle known as the axion holds the potential to resolve both the cosmic dar k matter riddle and particle physics' long-standing\, strong CP dilemma. U nusual strong 21 cm absorption feature associated with the initial star fo rmation era\, maybe due to ultralight axion dark matter ($\\sim 10^{-22}$ eV) at this time. The radio wave observation's 21 cm absorption signal can be explained as either anomalous baryon cooling or anomalous cosmic micro wave background photon heating. Shortly after the axions and axion like pa rticles (ALPs) thermalize among themselves and form a Bose-Einstein conden sate\, the cold dark matter ALPs make thermal contact with baryons\, cooli ng them. ALPs are thought to be the source of some new evidence for dark m atter\, as the baryon temperature at cosmic dawn was lower than predicted based on presumptions. The detection of baryon acoustic oscillations is fo und to be consistent with baryon cooling by dark matter ALPs. Simultaneous ly\, under the influence of the primordial black hole or intergalactic mag netic fields\, the dark radiation composed of ALPs can resonantly transfor m into photons\, significantly heating up the radiation in the frequency r ange relevant for the 21 cm tests. The two scenarios were considered. An i nteresting chance to investigate novel physics dynamics in the early cosmo s is presented by the 21 cm cosmology.\n\nhttps://indico.particle.mephi.ru /event/436/contributions/4149/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4149/ END:VEVENT BEGIN:VEVENT SUMMARY:Primordial black holes mergers DTSTART;VALUE=DATE-TIME:20241023T143000Z DTEND;VALUE=DATE-TIME:20241023T144500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4163@cern.ch DESCRIPTION:Speakers: Viktor Stasenko ()\nWe consider the formation and dy namics of primordial black holes (PBHs) binaries in both the early and lat e Universe\, taking into account clustering effects. The evolution of the PBH merger rate with redshift is obtained and shown to depend on the clust ering efficiency. The observation of gravitational waves by the LIGO-Virgo -KAGRA collaboration imposes the constraint that PBHs constitute no more t han 10% of the dark matter.\n\nhttps://indico.particle.mephi.ru/event/436/ contributions/4163/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4163/ END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Singularity with Quantum Geometric Approach DTSTART;VALUE=DATE-TIME:20241023T140000Z DTEND;VALUE=DATE-TIME:20241023T141500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4086@cern.ch DESCRIPTION:Speakers: Abdel Nasser Tawfik (Future Univrsity of Egypt)\nThe emergence of relativistic quantum gravitational effects is well anticipat ed when the Planck density ($m_p/\\ell_p^3$\, where $m_p$ is the Planck ma ss and $\\ell_p$ is the Planck length)\, regardless of whether the predict ion of an infinite-density singularity is viewed as a flaw in general rela tivity. Over the past century\, the orthogonality between quantum mechanic s and general relativity has been a persistent issue\, prompting the dedic ated efforts of brilliant scholars. Our focus is on a quantum geometric ap proach that expands the four-dimensional Riemann geometry (spacetime) to i ncorporate quantum-mechanical principles. This approach enables a comprehe nsive exploration of the fundamental nature of the Universe\, offering a m ore profound understanding of the underlying relativity and quantum princi ples governing its structure and evolution. The quantum geometric approach facilitates the derivation of the fundamental tensor\, upon which quantum -mechanically induced revisions are imposed. This\, in turn\, allows for t he construction of the general theory of relativity and the verification o f various black hole metrics\, while also enabling the examination of init ial and space singularities through timelike geodesic congruence.\n\nhttps ://indico.particle.mephi.ru/event/436/contributions/4086/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4086/ END:VEVENT BEGIN:VEVENT SUMMARY:Evolution of the mass spectrum of primordial black holes in the Fr iedmann Universe DTSTART;VALUE=DATE-TIME:20241023T153000Z DTEND;VALUE=DATE-TIME:20241023T154500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4155@cern.ch DESCRIPTION:Speakers: Lidiia Solnyshko (MIPT)\nWe investigated the evoluti on of the mass spectrum of primordial black holes (PBHs) in the expanding Universe under the action of Bondi-Hoyle-Lyttleton accretion and Hawking r adiation. The initial mass spectrum of primordial black holes was assumed to be flat (independent of mass). It was shown that accretion of matter su rrounding a black hole does not significantly affect the growth of the mas s of black holes. Using modeling\, it was found that by the end of the rad iation-dominated era\, all primordial black holes with masses up to $M=2\\ times10^{9}$ g had evaporated. We also confirmed the critical mass value f or primordial black holes\, at which they evaporate in our time. It is $M_ {cr}=2\\times10^{14}$ g.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4155/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4155/ END:VEVENT BEGIN:VEVENT SUMMARY:Limits on the properties of primordial black holes clusters from m icrolensing analysis DTSTART;VALUE=DATE-TIME:20241023T151500Z DTEND;VALUE=DATE-TIME:20241023T153000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4144@cern.ch DESCRIPTION:Speakers: Konstantin Toshchenko ()\nMicrolensing experiments s earching for MACHOs (massive astrophysical compact halo object\, MACHO) ha ve limited the possibility of the existence of dark matter in the form of MACHOs. These constraints on the fraction of dark matter are made for sing le MACHOs. The microlensing light curve for single MACHOs agrees well with the standard microlensing model. However\, the mutual influence of cluste red MACHOs can significantly change the light curves and therefore change the constraints on the MACHO fraction. \n\nWe have simulated microlensing events for models of the class of clustered primordial black holes (PBH). The analysis of microlensing events for these cluster models showed that t he fraction of MACHO mass that is not detected as single ones can reach up to 40%. Therefore\, observations of experiments such as MCHO\, EROS\, OGL E\, POINT-AGAPE\, HSC can impose tighter constraints on the fraction of MA CHOs. Although the models of PBH clusters that we consider reduce the lim itations due to clustering\, it is not possible to completely remove the l imitations on MACHO.\n\nhttps://indico.particle.mephi.ru/event/436/contrib utions/4144/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4144/ END:VEVENT BEGIN:VEVENT SUMMARY:Relic gravitational waves in cosmological models based on Einstein -Gauss-Bonnet gravity DTSTART;VALUE=DATE-TIME:20241023T150000Z DTEND;VALUE=DATE-TIME:20241023T151500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4141@cern.ch DESCRIPTION:Speakers: Gevorg Manucharyan (BMSTU\, SAI MSU)\nThe influence of non-minimal coupling between the scalar field and the Gauss-Bonnet term on the background parameters of cosmological models and the parameters of cosmological perturbations is considered by comparison with the case of t he Einstein gravity. The possibility of parametrization of this influence is shown.\nA procedure for reconstructing solutions of the cosmological dy namic equations obtained within the framework of General Relativity for th e case of the Einstein-Gauss-Bonnet gravity is presented.\nAs an example\, some models of cosmological inflation are considered. It is shown that th ese cosmological models can be verified by observational constraints on th e parameters of cosmological perturbations by taking into account the infl uence of the Gauss-Bonnet term.\nAlso\, proposed cosmological models satis fy modern observational constraints on the propagation speed of the gravit ational waves.\n\nThe specificity of the spectrum of relic gravitational w aves for inflationary models based on Einstein-Gauss-Bonnet gravity in com parison with the case of General Relativity is considered.\nThe effect of increasing energy density of the high-frequency relic gravitational waves in the proposed inflationary models is analyzed.\nThe possibility of regis tering relic gravitational waves predicted in these inflationary models is considered as well.\nTo assess the possibility of detection of relic grav itational waves\, the application of classical and modified Herzenstein ef fects and the high-frequency gravitational-optical resonance in multi-beam interferometers are analysed.\n\nhttps://indico.particle.mephi.ru/event/4 36/contributions/4141/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4141/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark matter around primordial black holes DTSTART;VALUE=DATE-TIME:20241023T141500Z DTEND;VALUE=DATE-TIME:20241023T143000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4148@cern.ch DESCRIPTION:Speakers: Yury Eroshenko (INR RAS)\nMassive primordial black h oles may have formed in the early universe\, accounting for a small fracti on of dark matter. Most of dark matter\, however\, may be composed of elem entary particles or black holes with smaller masses. These objects could f orm dense spikes around the large black holes during the radiation-dominat ed phase of the universe's evolution. Dark matter particles can annihilate in the spikes. In this study\, we discuss the structure and properties of the spikes\, considering their transformation due to annihilation. In the hybrid scenario involving black holes of various masses\, small black hol es can scatter and merge in the central regions around larger black holes. \n\nhttps://indico.particle.mephi.ru/event/436/contributions/4148/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4148/ END:VEVENT BEGIN:VEVENT SUMMARY:Multidimensional gravity\, black holes and mirror stars DTSTART;VALUE=DATE-TIME:20241023T154500Z DTEND;VALUE=DATE-TIME:20241023T160500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4139@cern.ch DESCRIPTION:Speakers: Kirill Bronnikov (VNIIMS)\nWe discuss a class of sol utions of multidimensional gravity which are formally related to black-hol e solutions but can observationally look like stars whose surface reflects back particles or signals getting there. Some particular examples of such solutions are presented and studied.\n\nhttps://indico.particle.mephi.ru/ event/436/contributions/4139/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4139/ END:VEVENT BEGIN:VEVENT SUMMARY:Cosmological models in the scalar-tensor theories of gravity\, con sistent with observational constraints DTSTART;VALUE=DATE-TIME:20241023T080000Z DTEND;VALUE=DATE-TIME:20241023T081500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4137@cern.ch DESCRIPTION:Speakers: Nickolay Koshelev (Ulyanovsk State Pedagogical Unive rsity)\nThis work considers two classes of cosmological models based on sc alar-tensor theories of gravity. The models are obtained using certain fun ctional relationships between the dynamics of the expansion of the Univers e and the type of scalar-tensor theories of gravity. The consistency of th e models with observational constraints according to Planck-2018 data is c onsidered.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/413 7/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4137/ END:VEVENT BEGIN:VEVENT SUMMARY:Reconstruction the scalar-torsion gravity version from the frame o f exact cosmological solutions DTSTART;VALUE=DATE-TIME:20241023T074500Z DTEND;VALUE=DATE-TIME:20241023T080000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4142@cern.ch DESCRIPTION:Speakers: Evgenii Dentsel (Assistant professor)\nCosmological models based on scalar-torsion gravity with non-minimal coupling between t he scalar field and torsion are considered. These models were obtained as a consequence of the generalized exact solutions of cosmological dynamic e quations for an arbitrary Hubble parameter and an arbitrary scalar field e volution.\n\nAn inflation models classification according to the expansion order of the tensor-to-scalar ratio dependence on spectral index of the scalar perturbations $r=r(1-n_{S})$ was also proposed. On the basis of thi s classification\, the method for constructing inflationary models based o n scalar-torsion gravity verified by observational constraints was consid ered\, implying a linear dependence $r\\sim(1-n_{S})$ for arbitrary model 's parameters.\nFor the gravity theory under consideration the type of sca lar field potential or other background parameters doesn't affect the poss ibility of verifying the inflationary models.\n\nAlso\, proposed inflation ary models can predict different types of tensor perturbation spectrum (re d\, blue or flat) depending on the tensor-to-scalar ratio value and how cl ose the early universe cosmological dynamics is to the purely exponential (de Sitter) expansion regime.\nThe proposed type of the scalar-torsion gra vity implying the wide class of verified cosmological models with arbitrar y parameters is of interest for the further deviations research in the rel ict gravitational waves spectrum and in the compact astrophysical objects evolution from teleparallel equivalent of general relativity or from the other modified gravity theories.\n\nhttps://indico.particle.mephi.ru/event /436/contributions/4142/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4142/ END:VEVENT BEGIN:VEVENT SUMMARY:On reconstruction procedure for special spherically-symmetric metr ics in scalar-Einstein-Gauss-Bonnet model: the Schwarzschild metric test DTSTART;VALUE=DATE-TIME:20241023T073000Z DTEND;VALUE=DATE-TIME:20241023T074500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4143@cern.ch DESCRIPTION:Speakers: Vladimir Ivashchuk (Center for Gravitation\, VNIIMS) \nThe $4d$ gravitational model with real scalar field $\\varphi$\, Einstei n and Gauss-Bonnet terms\nis considered. The action contains potential te rm $U(\\varphi)$ and Gauss-Bonnet coupling function $f(\\varphi)$.\nFor a special (static) spherically symmetric metric\n$ds^2 = \\left(A(u)\\right) ^{-1}du^2 - A(u)dt^2 + u^2 d\\Omega^2$\nwith $A(u) > 0$ ($u > 0$ is a rad ial coordinate) \nwe verify and correct the so-called reconstruction proc edure suggested by\n Nojiri and Nashed. This procedure presents certain implicit relations \n for $U(\\varphi)$\, $f(\\varphi)$ which lead to ex act solutions \nto the equations of motion for a given metric governed b y $A(u)$.\nHere we apply the procedure to (external) Schwarzschild metri c with gravitational radius $2 \\mu $ and $u > 2 \\mu$. Using ``no-ghost' ' restriction (i.e. reality of $\\varphi(u)$) we find two family of $(U(\ \varphi)\, f(\\varphi))$. The first one gives us the Schwarzschild metri c defined for $u > 3 \\mu$ and the second one describes the Schwarzschild metric defined for $ 2 \\mu \n\nhttps://indico.particle.mephi.ru/event/436 /contributions/4143/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4143/ END:VEVENT BEGIN:VEVENT SUMMARY:Horndeski theory on a dynamical spherically-symmetric background DTSTART;VALUE=DATE-TIME:20241023T071500Z DTEND;VALUE=DATE-TIME:20241023T073000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4153@cern.ch DESCRIPTION:Speakers: Mikhail Sharov (Institute for Nuclear Research of th e Russian Academy of Sciences)\nWe study the stability of classical soluti ons in Horndeski theory\, which is the most general scalar-tensor theory o f gravity with an additional scalar field and second-order motion equation s\, which in turn provides absence of Ostrogradski ghosts. In this work\, we address a general dynamical spherically symmetric background. We derive the set of stability conditions in the cubic subclass of Horndeski theory and formulate the no-go theorem for this subclass.\n \nFor full Horndeski theory and beyond Horndeski theory we formulate a set of linear stability conditions for high energy odd parity perturbation modes above an arbitra ry solution. In this general setting we derive speeds of propagation in bo th radial and angular directions for gravity waves and compare them with t he speed of light in the case of minimally coupled photon. In particular\, we find that the class of beyond Horndeski theories\, which satisfy the e quality of gravity waves’ speed to the speed of light over a cosmologica l background\, feature gravity waves propagating at luminal speeds above a time-dependent inhomogeneous background as well. [arXiv:2408.01480]\n\nWe revisit the models recently derived from a Kaluza-Klein compactification of higher dimensional Horndeski theory\, where the resulting electromagnet ic sector features non-trivial couplings to Horndeski scalar. In this work we prove that both gravitational wave and its electromagnetic counterpart propagate at the same\, although non-unit\, speed above an arbitrarily ti me-dependent\, spherically symmetric background within the theories in que stion. Hence\, we support the statement that several subclasses of Horndes ki theories are not necessarily ruled out after the GW170817 event provide d the photon-Galileon couplings are allowed. We also formulate the set sta bility conditions based on odd parity perturbations for an arbitraty solut ion within the discussed theoretical setting. [arXiv:2408.06329]\n\nhttps: //indico.particle.mephi.ru/event/436/contributions/4153/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4153/ END:VEVENT BEGIN:VEVENT SUMMARY:Should we take into account nontrivial spacetime topology\, change s of metric signature and similar hypothetical phenomena when quantizing g ravity? DTSTART;VALUE=DATE-TIME:20241023T070000Z DTEND;VALUE=DATE-TIME:20241023T071500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4156@cern.ch DESCRIPTION:Speakers: Tatyana Shestakova (Department of Theoretical and Co mputational Physics\, Southern Federal University)\nThe founders of quantu m geometrodynamics assumed that spacetime may have nontrivial topology: Jo hn Wheeler suggested the idea of spacetime foam\; Stephen Hawking wrote th at one would expect that quantum gravity would allow all possible topologi es of spacetime. Later\, A. D. Sakharov put forward yet more exotic hypoth esis that metric signature may change. Then the question arises\, do we re ally need to take into account all these hypothetical phenomena when quant izing gravity? Since observational data witnesses for an open flat univers e\, it is possible\, in principle\, to construct a theory of perturbations of gravitational and matter fields. However\, it would not be a full quan tum theory of gravity. I shall argue that the assumption about nontrivial spacetime topology\, etc. leads to a new description of the Universe in wh ich periods of unitary evolution give place to non-unitary changes of the Universe state. It gives a hope that it may shed light on an origin of irr eversibility.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/ 4156/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4156/ END:VEVENT BEGIN:VEVENT SUMMARY:New slow-roll approximations for inflation in Einstein-Gauss-Bonne t gravity DTSTART;VALUE=DATE-TIME:20241023T081500Z DTEND;VALUE=DATE-TIME:20241023T083000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4159@cern.ch DESCRIPTION:Speakers: Maria Skugoreva ()\nWe propose new slow-roll approxi mations for inflationary models with the Gauss-Bonnet term. We find more a ccurate expressions of the standard slow-roll parameters as functions of t he scalar field. To check the accuracy of approximations considered we con struct inflationary models with quadratic and quartic monomial potentials and the Gauss-Bonnet term. Numerical analysis of these models indicates th at the proposed inflationary scenarios do not contradict to the observatio n data. New slow-roll approximations show that the constructed inflationar y models are in agreement with the observation data\, whereas one does not get allowed observational parameters at the same values of parameters of the constructed models in the standard slow-roll approximation.\n\nhttps:/ /indico.particle.mephi.ru/event/436/contributions/4159/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4159/ END:VEVENT BEGIN:VEVENT SUMMARY:Finding the valid gravity theory from observations of black hole s ilhouettes DTSTART;VALUE=DATE-TIME:20241023T064000Z DTEND;VALUE=DATE-TIME:20241023T070000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4160@cern.ch DESCRIPTION:Speakers: Vyacheslav Dokuchaev (Institute for Nuclear Research of the Russian Academy of Sciences)\nNowadays the major problem in cosmol ogy is in the choice of the valid gravity theory for interpretation of the observational data. Usually in cosmology it is used the Einstein general theory of relativity and the corresponding Friedman-Robertson-Walker equat ions in the strong field limit (when gravitational potential is of the ord er of square of the light velocity). Meanwhile\, the general theory of rel ativity is verified and confirmed only in the weak field limit in the near est cosmological environments. Observations of black hole images (silhouet tes) opens a unique possibility for the verification (or falsification) of modified gravity theories in the strong field limit when gravitation domi nates over astrophysical or cosmological factors. This is especially cruci al for physical interpretation of astrophysical and cosmological observati ons of the far regions of the Universe and for understanding the physical origin of enigmatic dark matter and dark energy. The first visual images o f supermassive black holes M87* and SgrA* have been observed recently by t he Event Horizon Telescope. These images demonstrate a qualitative agreeme nt with the general theory of relativity. In the nearest future it would be possible to quantitatively scrutinize the known modified gravity theori es after construction of the Space Millimetron Observatory with nano-arcse cond angular resolution.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4160/ LOCATION: Moskvorechye 1 URL:https://indico.particle.mephi.ru/event/436/contributions/4160/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent nonperturbative insights into the QCD coupling and confinem ent: The holographic light-front perspective DTSTART;VALUE=DATE-TIME:20241024T130000Z DTEND;VALUE=DATE-TIME:20241024T133000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4136@cern.ch DESCRIPTION:Speakers: Guy De Teramond ()\nhttps://indico.particle.mephi.ru /event/436/contributions/4136/ LOCATION: Petrovsky hall URL:https://indico.particle.mephi.ru/event/436/contributions/4136/ END:VEVENT BEGIN:VEVENT SUMMARY:Effective field theories and search of New Physics beyond the stan dard model DTSTART;VALUE=DATE-TIME:20241024T123000Z DTEND;VALUE=DATE-TIME:20241024T130000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4135@cern.ch DESCRIPTION:Speakers: Eduard Boos ()\nhttps://indico.particle.mephi.ru/eve nt/436/contributions/4135/ LOCATION: Petrovsky hall URL:https://indico.particle.mephi.ru/event/436/contributions/4135/ END:VEVENT BEGIN:VEVENT SUMMARY:ATLAS+CMS physics highlights DTSTART;VALUE=DATE-TIME:20241024T120000Z DTEND;VALUE=DATE-TIME:20241024T123000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4134@cern.ch DESCRIPTION:Speakers: Anatolii Egorov (Petersburg Nuclear Physics Institut e NRC Kurchatov Institute & Peter the Great St. Petersburg Polytechnic Un iversity)\nhttps://indico.particle.mephi.ru/event/436/contributions/4134/ LOCATION: Petrovsky hall URL:https://indico.particle.mephi.ru/event/436/contributions/4134/ END:VEVENT BEGIN:VEVENT SUMMARY:Russian high-speed (up to 1000 MS/s) multichannel digitizers DTSTART;VALUE=DATE-TIME:20241024T103000Z DTEND;VALUE=DATE-TIME:20241024T110000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4133@cern.ch DESCRIPTION:Speakers: Ivan Bredikhin (GammaTECH)\nhttps://indico.particle. mephi.ru/event/436/contributions/4133/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4133/ END:VEVENT BEGIN:VEVENT SUMMARY:The TAIGA experiment - current status\, recent results and deve lopment prospects. DTSTART;VALUE=DATE-TIME:20241025T133000Z DTEND;VALUE=DATE-TIME:20241025T134500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4113@cern.ch DESCRIPTION:Speakers: Nikolay Budnev (Irkutsk State University)\nThe TAIGA experiment current status\, recent results and development prospects a re presented. The TAIGA observatory addresses ground-based gamma-ray astro nomy at energies from a few TeV to several PeV\, as well as cosmic ray phy sics from 100 TeV to several EeV and astroparticle physics. Presently the pilot TAIGA-1 complex includes integrating air Cherenkov TAIGA-HiSCORE arr ay with 120 wide-angle optical stations distributed over on area 1 square kilometer about and three the 4-m class Imaging Atmospheric Cherenkov Tele scopes of the TAIGA-IACT array. To study the entire energy range available for observation\, the TAIGA experiment uses three modes of detecting EAS from gamma-rays. Stand-alone mode is used to detecting gamma-rays with ene rgies of more than 2-3 TeV with only one IACT. To detect gamma-rays with e nergies above 10 TeV\, it is possible to use a stereo mode\, when - EAS is detected by two or more IACTs. The hybrid mode is to use joint data obta ined with the help of IACTs and HiSCORE stations. In this approach\, the r econstruction of the energy of the primary particle\, the direction and c ore position is carried out by analyzing the data of the HiSCORE and IAC Ts data ate used for the gamma/hadron separation. During the next three ye ars\, 2 more IACTs with a mirror diameter of 4 m will begin to work. To increase array the effective area for the energy above 300 TeV up to 2 km $^2$\, 10 - 15 stations of the TAIGA-HiSCORE array will be installed out side the border of TAIGA-HiSCORE array.. The further aim is to create a c omplex TAIGA-100\, 100 km$^2$ area\, for the study of the origin of cosmic rays in the energy range of 0.1-10$^4$ PeV\, by detecting gamma-rays in t he TeV-PeV energy range.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4113/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4113/ END:VEVENT BEGIN:VEVENT SUMMARY:Circular Electron Positron Collider: status and prospects DTSTART;VALUE=DATE-TIME:20241024T090000Z DTEND;VALUE=DATE-TIME:20241024T093000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4131@cern.ch DESCRIPTION:Speakers: Manqi Ruan ()\nhttps://indico.particle.mephi.ru/even t/436/contributions/4131/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4131/ END:VEVENT BEGIN:VEVENT SUMMARY:Muonography based on emulsion detectors in Russia DTSTART;VALUE=DATE-TIME:20241024T100000Z DTEND;VALUE=DATE-TIME:20241024T103000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4085@cern.ch DESCRIPTION:Speakers: Natalia Polukhina (MEPHI)\nA collaboration of MISIS\ , MEPhI\, SINP of MSU and LPI of RAS based on emulsion detectors has devel oped and is actively using in Russia a scientific engineering and technolo gical concept of muonographic work\, the created equipment and software. A successful series of works on muonography of large objects has been compl eted: assessment of the technical condition of the equipment of the distil lation column of the oil refinery by order of the Swiss company Sulzer\, m uonographic surveys of the mine of the Geophysical Service of the Russian Academy of Sciences in Obninsk\, inertial drums of the tire stand of the R esearch Institute of the Tire Industry\, etc. The muonography method was u sed to carry out the first surveys of cultural heritage sites - a unique a rchaeological site in the Naryn-Kala fortress (Derbent)\; buildings and te rritory of the Holy Trinity Danilov Monastery in Pereslavl-Zalessky - the work was awarded the Makaryev Nature Science Prize in 2022\; previously un known cavities were discovered in the cave church of the Pskov-Pechersky M onastery\; A muonographic survey of the territory and hidden structure of the buildings of the Spaso-Kamenny Preobrazhensky Monastery founded in 126 0 on Kamenny Island in Lake Kubenskoye was carried out. The author's metho dological approaches and technical solutions using emulsion track detector s\, as well as the results of the conducted investigations\, are of great importance from the point of view of further implementation prospects of a n effective\, economical and environmentally safe method of muonography\, as a method of non-destructive study of the internal structure of natural\ , industrial and architectural objects and for the creation of monitoring systems for problem objects to minimize the consequences of possible natur al and man-made disasters for the population\, infrastructure and the envi ronment.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4085/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4085/ END:VEVENT BEGIN:VEVENT SUMMARY:Nucleosynthesis in the crust of minimal mass neutron star. Strippi ng model. DTSTART;VALUE=DATE-TIME:20241023T142400Z DTEND;VALUE=DATE-TIME:20241023T143600Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4099@cern.ch DESCRIPTION:Speakers: Anton Ignatovskiy (National Research Center «Kurcha tov institute»\, Moscow\, 123182\, Russia)\nThe discovery of lanthanides traces in the kilonova spectra after recording a gamma-ray burst and gravi tational waves [1] confirmed theoretical scenarios for the development of the r-process [2]\, associated with the neutron stars merger at the end of a close binary system evolution. After successful r-process simulation th at occurs as a result of the neutron stars merger and observing these even ts\, it became clear that this scenario is crucial for the heaviest nuclei formation. However\, the neutron stars evolution in close binary systems strongly depends on their masses. With a large neutron stars masses differ ence\, a stripping scenario is implemented instead of merging [3]\, which\ , in particular\, has different heavy elements nucleosynthesis path [4\,5] .\n\nIn this work the nucleosynthesis in the low-mass neutron star crust\ , which loses mass due to accretion onto a larger companion and explodes u pon reaching a hydrodynamically unstable configuration [3] is considered.\ n\nIt was shown that in the stripping scenario the exploded residue substa nce expands and\, while its density is high\, new elements nucleosynthesis occurs. In the inner crust it originates mainly due to the r-process. Nuc leosynthesis in the outer crust occurs mainly due to explosive nucleosynth esis following sharp increase in temperature caused by a shock wave\, and forms significant number of light nuclei. A simple model of subnuclear den se matter decompression is proposed. The amount of heavy elements formed i n a neutron star crust is M ~ 0.04Mʘ\, which is at least an order of magn itude greater than the yield of heavy elements in the close masses neutron stars mergering scenario [6].\n\nThe work was carried out within the stat e assignment framework of the National Research Center «Kurchatov Institu te».\n\n1. N. R. Tanvir\, A. J. Levan\, C. González-Fernández\, et al. // AJ. 2017. V. 848. P. L27.\n2. J. Cowan\, et al. // Rev. Mod. Phys. 2021 . V. 93. id. 15002.\n3. S. I. Blinnikov\, D. K. Nadyozhin\, N. I. Kramarev \, A. V. Yudin // Astronomy Reports. 2021. V. 65. P. 385.\n4. I.V. Panov\, A.V. Yudin // Astronomy Letters. 2020. V. 46 P. 518.\n5. A. Yudin\, N. Kr amarev\, I. Panov\, A. Ignatovskiy // Particles. 2023. V. 6. P. 784.\n6. S . Rosswog\, et al. // Astron. Astrophys. 1999. V. 341. P. 499.\n\nhttps:/ /indico.particle.mephi.ru/event/436/contributions/4099/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4099/ END:VEVENT BEGIN:VEVENT SUMMARY:Quark-less Baryonium Dark Matter States as Progenitors for Hadron Generations DTSTART;VALUE=DATE-TIME:20241023T154800Z DTEND;VALUE=DATE-TIME:20241023T160000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4118@cern.ch DESCRIPTION:Speakers: Olga Piskounova (FIAN)\nAbstract.\nQuark-less baryon ium diagram appeared in the old paper on baryonium physics (L. Montanet\, G.C. Rossi\, G.Veneziano\, 1980). If two gluon lines in this diagram are c ut\, we have tetraquark with two quarks and two anti-quarks. This idea can be expanded to multi baryon-antibaryon states of Baryonium Dark Matter (B DM)\, see (Piskounova\, 2023). Baryonium Dark Matter consists of the net o f baryon and antibaryon String Junctions (SJ) completely connected via glu ons on the surface of torus. BDM states have no quarks and zero baryon cha rge because of equal numbers SJs and anti-SJs. The progression of BDM mass was assumed exponential that is natural for QCD physics\, see (O. Piskoun ova\, 2016). The low mass baryonium states are studied in order to show ho w they correspond to the BDM mass sequence. Previously-observed heavy bary onium states (1835 MeV\, 1851 MeV and 1859 MeV are very close to the third order mass in BDM progression\, $1855\\pm15$ MeV\, see (Piskounova \, 201 9). Since BDMs particles are quark-less and rather compressed\, they have hidden mass and can be deconstructed into charmed baryonium resonance\, or into charmed tetraquarks\, pentaquarks\, hexaquarks etc. Each product may be accompanied at the deconstruction of BDM with dozens of pions and phot ons. In such a way\, the states of BDM have to be considered as the progen itors of particles in hadron generations. Next state of BDM is expected of mass near the beauty family of hadrons\, $5042\\pm40$ MeV. The important advantages of Baryonium Dark Matter for astrophysics of Universe have been discussed.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/41 18/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4118/ END:VEVENT BEGIN:VEVENT SUMMARY:PHELEX: Results and Perspectives DTSTART;VALUE=DATE-TIME:20241023T153600Z DTEND;VALUE=DATE-TIME:20241023T154800Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4117@cern.ch DESCRIPTION:Speakers: Anatoly Kopylov ()\nAbstract\n\nThe results obtained in two series of measurements within 2023-2024 years with a multi-cathode counter with an iron cathode are presented. We observe some excess in cou nt rates at certain periods in sidereal time. No similar effect has been o bserved in terrestrial time. This can be interpreted that probably this ef fect is of galactic origin and being this can be associated with dark phot ons. The future steps are discussed to increase the reliability of the res ults and to clarify important details.\n\nhttps://indico.particle.mephi.ru /event/436/contributions/4117/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4117/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent progress in heavy-ion physics: A theoretical review DTSTART;VALUE=DATE-TIME:20241025T123000Z DTEND;VALUE=DATE-TIME:20241025T130000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4130@cern.ch DESCRIPTION:Speakers: Alejandro Ayala (Instituto de Ciencias Nucleares\, U niversidad Nacional Autónoma de México)\nhttps://indico.particle.mephi.r u/event/436/contributions/4130/ LOCATION: Petrovskiy hall (Petrovskiy 1) URL:https://indico.particle.mephi.ru/event/436/contributions/4130/ END:VEVENT BEGIN:VEVENT SUMMARY:A search for correlation of neutrino events in the Borexino detect or with transient astrophysical phenomena DTSTART;VALUE=DATE-TIME:20241023T152400Z DTEND;VALUE=DATE-TIME:20241023T153600Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4105@cern.ch DESCRIPTION:Speakers: Irina Lomskaya (PNPI NRCKI named B.P. Konstantinov)\ nStudying of transient phenomena reveals some of the most dynamic and expl osive objects in the Universe. These transients are crucial for gaining in sight into the behavior and evolution of the cosmos. They also help us und erstand the physics behind non-transient sources\, such as how supernovae provide clues about stellar evolution. Regardless of how transients are us ed to explore different aspects of the universe\, they will remain a key f ocus in astronomy\, especially as new telescopes and surveys are developed to observe our ever-changing cosmos.\n\nIn current work\, we studied tran sient events such as Fast Radio Bursts (FRBs) and Gravitational Waves (GWs ) using the Borexino detector signals $\\pm5000$ s within time windows ar ound the prompt event. We searched for temporal correlations for 42 FRBs w ith ΦFRBi > 40 Jy·ms\, and also investigated temporal correlations for 7 4 GWs\, including those presumably originating from black hole mergers and neutron star mergers. In both searches no statistically significant exces s of events was observed. As a result\, new strict upper limits have been set on $\\nu_x$ fluences in the 0.5–15 MeV energy range for temporal cor relations with FRBs\, and new limits on $\\nu_x$ fluences in the 0.5–50 MeV range for GW events.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4105/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4105/ END:VEVENT BEGIN:VEVENT SUMMARY:Direct detection of Dark matter and neutrino fog DTSTART;VALUE=DATE-TIME:20241023T151200Z DTEND;VALUE=DATE-TIME:20241023T152400Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4100@cern.ch DESCRIPTION:Speakers: Roberta Calabrese (INFN - Sezione di Napoli)\nDespit e the overwhelming indirect evidence\, the nature of dark matter is still a mystery. This talk will overview the experimental efforts to detect Dark Matter directly\, highlighting the latest findings from relevant experime nts. Additionally\, we will explore emerging technologies aimed at detecti ng very light Dark Matter candidates. This talk will also discuss the neut rino floor and its implications for future dark matter searches.\n\nhttps: //indico.particle.mephi.ru/event/436/contributions/4100/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4100/ END:VEVENT BEGIN:VEVENT SUMMARY:Review of neural network methods for the BaikalGVD experiment DTSTART;VALUE=DATE-TIME:20241023T150000Z DTEND;VALUE=DATE-TIME:20241023T151200Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4092@cern.ch DESCRIPTION:Speakers: Grigory Plotnikov (MIPT)\nBaikal-GVD is a neutrino t elescope with an effective volume of approximately 1 km³\, located in Lak e Baikal. This experiment leverages a neural network-based approach to add ress multiple challenges in data analysis:\n\n 1. Suppression of noise hit s of the optical modules (OMs) caused by the natural luminescence of the m edium\, while preserving signal hits generated by Cherenkov radiation\;\n 2. selection of events caused by neutrinos against the dominant background of events caused by extensive air showers\;\n 3. Reconstruction of the ne utrino's arrival direction\;\n 4. Reconstruction of neutrino energy.\n\nMo nte Carlo simulations demonstrate that the developed neural networks achie ve performance metrics comparable to traditional methods. Futhermore\, for task 1\, the neural network surpasses standard techniques (achieving 99.5 % "precision" metric versus 95%). For task 2\, a novel method developed th at estimates the total number of neutrino-induced events in a dataset and the associated error. In task 4\, a neural network model is developed to p redict the energy of neutrino events along with an estimate of the predict ion error\, corresponding to one standard deviation.\n\nhttps://indico.par ticle.mephi.ru/event/436/contributions/4092/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4092/ END:VEVENT BEGIN:VEVENT SUMMARY:Minimal analytical model of neutrino distribution function in supe rnova DTSTART;VALUE=DATE-TIME:20241023T144800Z DTEND;VALUE=DATE-TIME:20241023T150000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4110@cern.ch DESCRIPTION:Speakers: Alexandra Dobrynina (P.G. Demidov Yaroslavl State Un iversity)\nThe possibility of an analytical approximation of nonequilibriu m neutrino radiation under core-collapse supernova conditions is considere d. Analysis is based on results of a one-dimensional simulation of neutrin o propagation\, performed self-consistently with hydrodynamics in Promethe us-Vertex code. In minimal model\, an analytical approximation depends on four parameters at each point of the supernova. As the analysis shown\, in the outer part of the supernova the dependence of these parameters on the radial coordinate can be expressed through the radius of the protoneutron star\, luminosity\, spectrum width and the average energy of the neutrino s leaving the supernova. Note that the values of last two parameters are p ractically same in various simulations of the supernova explosion. Thus\, in the outer part the neutrino radiation is determined only by two global parameters of the explosion: the protoneutron star radius and the neutrino luminosity.\n\nThe work is supported by the Russian Science Foundation (G rant No.\n24-22-00417\, https://rscf.ru/project/24-22-00417/)\n\nhttps://i ndico.particle.mephi.ru/event/436/contributions/4110/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4110/ END:VEVENT BEGIN:VEVENT SUMMARY:Heating of a molecular cloud by a primordial black hole DTSTART;VALUE=DATE-TIME:20241023T143600Z DTEND;VALUE=DATE-TIME:20241023T144800Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4097@cern.ch DESCRIPTION:Speakers: Alexander Melikhov ()\nThe process of dust heating b y photons from primordial black hole (PBH) in a molecular cloud with masse s $M = 10^{16} - 10^{20}$ g has been considered. Under the assumption that dust particles are uniformly distributed in a spherically symmetric cloud and have sizes $a = 0.01\, 0.02\, 0.05$\, and $0.1$ $\\mu$m\, the dust te mperature as a function of the distance to the PBH was calculated. From th e plots obtained\, it follows that directly near the PBH the dust particle s are heated to a temperature $T \\leq 10^2$ K\, and with increasing dista nce the temperature drops sharply. Thus\, PBH can heat only a spherical la yer of the molecular cloud whose radius $r$ does not exceed $10^3$ cm. In addition\, the emission spectra of dust particles heated by PBH were const ructed and it was shown how the spectra depend on the dust number density in the molecular cloud and on the particle size. The sensitivity plots of the planned Millimetron space observatory in the interferometer mode were superimposed on the obtained spectra and it was shown that in the presence of PBH in the cloud\, it can be registered if the dust number density in the cloud is between $n_d = 10^{-4}$ cm$^{-3}$ and $n_d = 10^{-1}$ cm$^{-3 }$ (with the size of individual dust particles in the cloud varying from $ 0.1$ to $0.01$ $\\mu$m\, respectively).\n\nhttps://indico.particle.mephi.r u/event/436/contributions/4097/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4097/ END:VEVENT BEGIN:VEVENT SUMMARY:Correlations of Neutron Star Observables with Properties of Nucleo nic and Hyperonic Interactions DTSTART;VALUE=DATE-TIME:20241023T141200Z DTEND;VALUE=DATE-TIME:20241023T142400Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4093@cern.ch DESCRIPTION:Speakers: Artur Nasakin (Faculty of Physics\, Lomonosov Moscow State University)\nA wide range of extreme states of the nuclear matter t hat cannot be studied in terrestrial conditions is realized in neutron sta rs\, making them a source of information on the properties of baryonic int eractions and nuclear matter under conditions different from those in the most stable nuclei. Under such conditions\, additional sensitivity to cert ain properties of baryonic interactions may arise. At densities several ti mes higher than the normal nuclear density\, hyperons may appear in the ne utron star matter.\n\nIn this paper\, we study the dependence of the obser vables of neutron stars\, such as the maximum mass\, the corresponding min imum radius\, the tidal deformability coefficient for stars with a mass of 1.4M$\\odot$ and their radius on the properties of hyperon-nucleon and nu cleon-nucleon interactions.\n\nIn particular\, a strong interplay was esta blished between the parameters of neutron stars and the density at which h yperons appear\, as well as the contracting power of YN interactions.\n\nT his work was supported by the Russian Science Foundation under Grant No 24 -22-00077\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4093 / LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4093/ END:VEVENT BEGIN:VEVENT SUMMARY:Crust of accreting neutron stars DTSTART;VALUE=DATE-TIME:20241023T140000Z DTEND;VALUE=DATE-TIME:20241023T141200Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4104@cern.ch DESCRIPTION:Speakers: Andrey Chugunov (Ioffe Institute)\nThe report summar ize results of a series of papers on modelling the nuclear-physical evolut ion of the outer layers (crust) of neutron stars in low mass X-ray binarie s. In these systems\, material is transferred from the companion star to t he neutron star\, a process known as 'accretion' in astrophysical literatu re. As a result\, the original crust is replaced by accreted material.\n\n We demonstrate that the presence of free neutrons (unbound in atomic nucle i) in the inner crust plays a crucial role in the nuclear physical process of forming the accreted crust. Neutrons redistribute rapidly between the layers of the inner crust due to superfluidity and diffusion (with diffusi on being important near the boundary between the outer and inner crust\, w here neutrons are not superfluid). This effect was not considered in previ ous models developed over approximately 40 years\, leading to a radical ch ange in the nuclear reactions chains and the composition of the crust. Con sequently\, several previously accepted statements are shown to be incorre ct. For instance\, it was previously believed that the main reactions in t he inner crust were electron capture and neutron emission\, and the transi tion to the inner crust was associated with reaching the neutron drip line . In our work\, we demonstrate that reverse reactions occur in the inner c rust (neutron capture and electron emission)\, and the boundary between th e inner and outer crusts is determined by the redistribution of free neutr ons in the crust and the star's core\, maintaining diffusion-hydrostatic e quilibrium.\n\nWe propose and apply a general\, convenient formula based o n the energy conservation law for calculating the heating efficiency of th e crust\, which is shown to be several times lower than previously estimat ed. These findings are then applied to interpret observations of accreting neutron stars.\n\nThe work was supported by the Russian Science Foundatio n\, grant 22-12-00048.\n\nhttps://indico.particle.mephi.ru/event/436/contr ibutions/4104/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4104/ END:VEVENT BEGIN:VEVENT SUMMARY:Highlights from STAR beam energy scan II program DTSTART;VALUE=DATE-TIME:20241025T120000Z DTEND;VALUE=DATE-TIME:20241025T123000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4083@cern.ch DESCRIPTION:Speakers: Alexey Aparin (JINR)\nSTAR detector at the Relativis tic Heavy Ion Collider (RHIC) has successfully completed data taking for t he second phase of the Beam Energy Scan (BES-II) program in year 2021. Dur ing this program STAR has collected experimental data on Au-Au collisions in the energy range from $\\sqrt{s}_{NN} = 3$ to 13.7 GeV in the fixed tar get mode and form $\\sqrt{s}_{NN}=7.7$ to 27 GeV in the collider mode. Maj or detector upgrades have greatly increased detector capabilities to track charged particles produced in the collisions. This energy range covers a broad region in the QCD phase diagram\, reaching up to baryon chemical pot ential of 750 MeV. Measurements in this region will help understand nature of the phase transition to the QGP phase and search for the existence of the QCD critical point. \nA wide range of results on particle anisotropic flow\, correlations and production including of light nuclei and hypernucl ei has been obtained from BES-II data. New results on the collective pheno mena like partial restoration of NCQ scaling at low energies and cumulant ratio of net-proton multiplicity distribution have been measured with high precision and are presented. Precise analysis of variety of effects like energy dependence of coalescence parameters and hypernuclei lifetime measu rements are presented. Also\, comparison and new data on global polarizati on and spin alignment are presented.\n\nhttps://indico.particle.mephi.ru/e vent/436/contributions/4083/ LOCATION: Petrovskiy hall (Petrovskiy 1) URL:https://indico.particle.mephi.ru/event/436/contributions/4083/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent heavy ion results from LHC experiments DTSTART;VALUE=DATE-TIME:20241025T113000Z DTEND;VALUE=DATE-TIME:20241025T120000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4084@cern.ch DESCRIPTION:Speakers: Sergey Petrushanko (M.V.Lomonosov Moscow State Unive rsity\, Skobeltsyn Institute of Nuclear Physics)\nThe selection of new res ults by the Compact Muon Solenoid (CMS) detector and other LHC experiments on heavy-ion physics at the LHC energies will be presented.\n\nhttps://in dico.particle.mephi.ru/event/436/contributions/4084/ LOCATION: Petrovskiy hall (Petrovskiy 1) URL:https://indico.particle.mephi.ru/event/436/contributions/4084/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino physics - Review of selected topics DTSTART;VALUE=DATE-TIME:20241023T130000Z DTEND;VALUE=DATE-TIME:20241023T133000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4129@cern.ch DESCRIPTION:Speakers: Thomas Kutter ()\nhttps://indico.particle.mephi.ru/e vent/436/contributions/4129/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4129/ END:VEVENT BEGIN:VEVENT SUMMARY:Experiment SABRE DTSTART;VALUE=DATE-TIME:20241023T123000Z DTEND;VALUE=DATE-TIME:20241023T130000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4128@cern.ch DESCRIPTION:Speakers: Aldo Ianni ()\nhttps://indico.particle.mephi.ru/even t/436/contributions/4128/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4128/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino astronomy at Lake Baikal DTSTART;VALUE=DATE-TIME:20241023T120000Z DTEND;VALUE=DATE-TIME:20241023T123000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4081@cern.ch DESCRIPTION:Speakers: Dmitry Zaborov (INR RAS)\nHigh energy neutrino astro nomy has seen significant progress in the past few years. This includes th e detection of neutrino flux from the Galactic plane\, as well as strong e vidence for neutrino emission from the active galaxy NGC 1068\, both repor ted by IceCube. New results start coming from the two km3-scale neutrino t elescopes under construction in the Northern hemisphere: KM3NeT in the Med iterranean sea and Baikal-GVD in Lake Baikal. After briefly reviewing the status of the field\, we present the current status of the Baikal-GVD neut rino telescope and its recent results\, including observations of atmosphe ric and astrophysical neutrinos.\n\nhttps://indico.particle.mephi.ru/event /436/contributions/4081/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4081/ END:VEVENT BEGIN:VEVENT SUMMARY:The Javalambre Physics of the Acceleratig Universe Astrophysical S urvey. Current Status and Early Data Release DTSTART;VALUE=DATE-TIME:20241023T103000Z DTEND;VALUE=DATE-TIME:20241023T110000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4127@cern.ch DESCRIPTION:Speakers: Renato Dupke ()\nhttps://indico.particle.mephi.ru/ev ent/436/contributions/4127/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4127/ END:VEVENT BEGIN:VEVENT SUMMARY:Beyond The Standard Model in Multi-messenger astrophysics DTSTART;VALUE=DATE-TIME:20241023T100000Z DTEND;VALUE=DATE-TIME:20241023T103000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4126@cern.ch DESCRIPTION:Speakers: Andrea Addazi ()\nhttps://indico.particle.mephi.ru/e vent/436/contributions/4126/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4126/ END:VEVENT BEGIN:VEVENT SUMMARY:Seeding of cosmic structures in contemporary and young universe DTSTART;VALUE=DATE-TIME:20241023T093000Z DTEND;VALUE=DATE-TIME:20241023T100000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4125@cern.ch DESCRIPTION:Speakers: Alexander Dolgov (Novosibirsk State University and B LTP JINR)\, Alexander Dolgov (Novosibirsk State University and ITEP)\nhttp s://indico.particle.mephi.ru/event/436/contributions/4125/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4125/ END:VEVENT BEGIN:VEVENT SUMMARY:Astronomy of ultrahigh energy cosmic rays DTSTART;VALUE=DATE-TIME:20241022T133000Z DTEND;VALUE=DATE-TIME:20241022T140000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4124@cern.ch DESCRIPTION:Speakers: Daniele Fargion ()\nhttps://indico.particle.mephi.ru /event/436/contributions/4124/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4124/ END:VEVENT BEGIN:VEVENT SUMMARY:Applied research at NICA facility: Status of ARIADNA infrastructur e and related scientific programme DTSTART;VALUE=DATE-TIME:20241022T130000Z DTEND;VALUE=DATE-TIME:20241022T133000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4123@cern.ch DESCRIPTION:Speakers: Oleg Belov ()\nhttps://indico.particle.mephi.ru/even t/436/contributions/4123/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4123/ END:VEVENT BEGIN:VEVENT SUMMARY:SPD experiment at NICA coliider: status and outlooks DTSTART;VALUE=DATE-TIME:20241022T102000Z DTEND;VALUE=DATE-TIME:20241022T105500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4122@cern.ch DESCRIPTION:Speakers: Victor Kim (Petersburg Nuclear Physics Institute\, N RC KI\, Gatchina)\, Victor Kim (NRC KI - PNPI\, Gatchina & SPbPU\, St. Pet ersburg)\nhttps://indico.particle.mephi.ru/event/436/contributions/4122/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4122/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent results on kaon physics from the OKA experiment DTSTART;VALUE=DATE-TIME:20241022T123000Z DTEND;VALUE=DATE-TIME:20241022T130000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4080@cern.ch DESCRIPTION:Speakers: Vladimir Obraztsov (Institute for High Energy Physic s - "NRC KI")\nThe talk is devoted to the latest results from the OKA coll aboration. The OKA setup is using the RF-separated 17.7 GeV/c momentum kao n beam of the U-70 accelerator. The data corresponds to the flux of $2.62 ·10^{10}$ «live» kaons entering the decay volume.\nA missing mass analy sis is performed to search for an invisible pseudoscalar axion-like part icle(ALP) in the decay $K^+ \\rightarrow \\pi^+\\pi^0 a $. No signal is ob served\,the 90% CL upper limit is changing from $2.5·10^{-6}$ to $2·10^ {-7}$ for the ALP mass from 0 to 200 MeV. \nSeveral rare EM decays are investigated:\nA new precise measurement of the vector and axial-vector fo rm factor difference $F_V − F_A$ in the $K^+ \\rightarrow \\mu^+ \\n u \\gamma$ decay is reported. About 144K events are selected. The prelimi nary result is $F_V − F_A = 0.135 \\pm 0.017(stat)\\pm 0.024(syst)$ whi ch differs by $\\sim 3 \\sigma$ from $χPT(O(p^4))$ and by 1.5 σ from the Lattice calculations. \nThe $K^+ \\rightarrow \\mu^+ \\nu \\pi^0 \\ga mma (K\\mu3\\gamma)$ decay is studied with the high statistics of more t han 1000 signal events with the energy of the emitted photon in the rest frame of the decaying kaon $E_\\gamma > 30$ MeV. Using $4.48 · 10^6$ events of the decay the ratio Br($K\\mu3\\g amma$)/Br($K\\mu3$) is found to be $(4.45 \\pm 0.25(stat)) · 10^{−4}$. From this value\, using Br(Kµ3) = 3.352% we get Br($K\\mu3\\gamma) = (1.4 92 ± 0.085(stat)) · 10^{−5}$. Our result is preliminary\, with system atic errors being estimated. \nA rare EM decay $K^+ \\rightarrow \\pi^ + \\pi^0 \\pi^0 \\gamma$ is observed for the first time on the statistic s of ~50 events with $E_\\gamma >10$ MeV. The branching is measured to be Br$ = (3.7 \\pm 0.9 \\pm 0.3 ) · 10^{-6} E_\\gamma > 10$ МэВ \nA super-rare EM decay $K^+ \\rightarrow e^+ \\nu \\pi^0 \\pi^0 \\ pi^0 $ is searched for\, no events were observed\, the upper limit set is: Br$ \n\nhttps://indico.particle.mephi.ru/event/436/contributions/40 80/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4080/ END:VEVENT BEGIN:VEVENT SUMMARY:Polarization experiment SPASCHARM at U70 accelerator complex DTSTART;VALUE=DATE-TIME:20241022T120000Z DTEND;VALUE=DATE-TIME:20241022T123000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4079@cern.ch DESCRIPTION:Speakers: Vasilii Mochalov (IHEP\, Protvino\, Russia)\nSPASCHA RM experiment at U70 accelerator complex at NRC "Kurchatov Institute" has obtained first physics results. Overview of the experimental program inclu ding first results and complete program of spin studies are presented.\n\n https://indico.particle.mephi.ru/event/436/contributions/4079/ LOCATION: Petrovskiy hall URL:https://indico.particle.mephi.ru/event/436/contributions/4079/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome from the Organizing and Programm Committee DTSTART;VALUE=DATE-TIME:20241022T090000Z DTEND;VALUE=DATE-TIME:20241022T091000Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4120@cern.ch DESCRIPTION:Speakers: Vladimir Shevchenko ()\nhttps://indico.particle.meph i.ru/event/436/contributions/4120/ LOCATION:Hotel Intourist Kolomenskoye 4* URL:https://indico.particle.mephi.ru/event/436/contributions/4120/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of Reasons of the Geomagnetic Storm on December 1-2 2023 from Interplanetary Scintillation Observations at the BSA LPI Radio Telesc ope DTSTART;VALUE=DATE-TIME:20241025T153300Z DTEND;VALUE=DATE-TIME:20241025T154500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4114@cern.ch DESCRIPTION:Speakers: Vladislav Lukmanov (Lebedev Physical Institute)\nThe results of the analysis of interplanetary scintillation observation data obtained by the radio telescope Big Scanning Antenna of the Lebedev Physic al Institute (BSA LPI) before\, during and after the magnetic storm that o ccurred on December 1-2\, 2023 are presented. The observational data are c ompared with model calculations for corotating and propagating large-scale disturbances. The results of observations of scintillating radio sources indicate that the magnetic storm that took place was caused by a superpos ition of two types of large-scale solar wind disturbances. On the day bef ore the start of the magnetic storm\, signs of interaction between the Ear th's magnetosphere and the corotating region of multi-velocity solar wind flows were observed\, whereas later signs of magnetosphere disturbance by coronal mass ejection spreading after the M9.8 solar flare on November 28\ , 2023 were observed.\n\nhttps://indico.particle.mephi.ru/event/436/contri butions/4114/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4114/ END:VEVENT BEGIN:VEVENT SUMMARY:Thin layer axion dynamo DTSTART;VALUE=DATE-TIME:20241025T142100Z DTEND;VALUE=DATE-TIME:20241025T143300Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4115@cern.ch DESCRIPTION:Speakers: Maxim Dvornikov (Institute of Terrestrial Magnetism\ , Ionosphere and Radiowave Propagation (IZMIRAN))\nWe study interacting cl assical magnetic and pseudoscalar fields in frames of the axion electrodyn amics. A large scale pseudoscalar field can be the coherent superposition of axions or axion like particles. We consider the evolution of these fiel ds inside a spherical clump. Decomposing the magnetic field into the poloi dal and toroidal components\, we take into account their symmetry properti es. Within a spherical clump\, we use a thin layer approximation in the in duction and Klein-Gordon equations\, where the dependence of the fields o n the latitude is accounted for. Then\, we derive the dynamo equations in the low mode approximation. The nonlinear evolution equations for the harm onics of the magnetic and pseudoscalar fields are solved numerically. As a n application\, we consider a dense axion star embedded in solar plasma. T he behavior of the harmonics and their typical oscillations frequencies ar e obtained. We suggest that such small size axionic objects\, containing o scillating magnetic fields\, can cause electromagnetic flashes\, recently observed in the solar corona\, contributing to the corona heating.\n\nRefe rences\n\nM. Dvornikov\, Thin layer axion dynamo\, to be published in Eur. Phys. J. C\, arxiv:2401.03185.\n\nhttps://indico.particle.mephi.ru/event/ 436/contributions/4115/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4115/ END:VEVENT BEGIN:VEVENT SUMMARY:Arcade of magnetic lines passing through the chain of density maxi ma: the result of MHD simulation above active region in order to obtain co nditions for acceleration of solar cosmic rays DTSTART;VALUE=DATE-TIME:20241025T152100Z DTEND;VALUE=DATE-TIME:20241025T153300Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4116@cern.ch DESCRIPTION:Speakers: Alexander Podgorny (Lebedev Physical Institute RAS)\ nIn order to study the physical mechanism of solar cosmic ray acceleration \, it is necessary to simultaneously study the physical mechanism of a sol ar flare\, since solar cosmic rays are generated during solar flares. Nume rous observations\, the most important of which is the direct observation of the source of thermal X-ray emission of a flare at the edge of the sola r disk\, indicate that flares occur in the solar corona at altitudes of 15 \,000-70\,000 km (1/40 - 1/10 of the solar radius). The results of MHD sim ulation confirm the occurrence of flares at these altitudes. The slow accu mulation of energy for a solar flare in a stable magnetic field configurat ion in the corona\, and then its transition to an unstable state\, explain s the physical mechanism of S. I. Syrovatsky\, based on the accumulation o f energy in the magnetic field of the current sheet formed in the vicinity of a singular magnetic line. The fast release of magnetic energy of the c urrent sheet leads to the observed manifestations of a flare\, which are e xplained by the electrodynamic model of a solar flare proposed by I. M. Po dgorny. In the current sheet\, due to the dissipation of magnetic energy\, the plasma is heated to a temperature of several tens of millions of degr ees\, resulting in the appearance of a source of thermal soft X-ray emissi on with energies of 3 - 25 keV. The Hall electric field in the current she et creates an electric circuit consisting of field-aligned currents along magnetic lines exiting from the current sheet\, which are closed by the Pe tersen current on the photosphere. Electrons accelerated in field-aligned currents\, interacting with the lower dense layers of the solar atmosphere \, cause beam hard X-ray emission with energies of 50 - 100 keV and higher on the surface of the Sun. The ejection of plasma under the action of mag netic tension force in the current sheet\, the appearance of flare arches\ , and a number of other manifestations of a solar flare are also explained by the electrodynamic model. Generation of solar cosmic rays occurs as a result of acceleration of charged particles (mainly protons) by the induct ion electric field\, which arises due to fast change of magnetic field dur ing flare instability\, which is equal to the field $ V \\times B /c $ nea r the current sheet (the product of the velocity of plasma inflow into the sheet and the magnetic field created by the sheet current). An estimate o f the measured energies of solar cosmic rays up to 20 GeV is obtained if w e take a typical field above the active region of 100 G\, the velocity of plasma inflow into the sheet of $2 \\times 10^7$ cm/s and the length of th e sheet on which acceleration occurs of $10^9$ cm. During superflares on t he star dwarfs of the class G\, the power of which is four orders of magni tude greater than the power of solar flares\, acceleration of galactic cos mic rays to energies of $10^{15}$ eV can occur. This estimate will be obta ined if we take the magnetic field and the velocity of plasma inflow into the sheet to be 100 times greater\, and the length of the current sheet to be 10 times greater compared to the values of these quantities for solar flares.\n\nSince it is impossible to obtain the magnetic field configurati on in the corona from observations\, it is necessary to carry out MHD simu lation above the active region to study the mechanism of solar flares. MHD simulation will also allow us to obtain the configurations of the electri c and magnetic fields to study the acceleration of cosmic rays by calculat ing the trajectories of test charged particles in these fields. Calculatio ns of particle motion in fields obtained under simplified conditions have made it possible to obtain an idea of the mechanism of generation of solar cosmic rays. Now it is necessary to carry out more accurate MHD simulatio n using maps of the observed magnetic field on the solar surface. \n\nWhen setting the problem of MHD simulation\, no assumptions were made about th e physical mechanism of solar flares. All conditions were taken from obser vations. The aim of MHD simulation is to find the physical mechanism of a solar flare\, and not to verify a hypothesis regarding the proposed mechan ism. To properly study the physical mechanism of a solar flare\, when perf orming of MHD simulation\, the calculation should begin several days befor e the appearance of flares\, when the energy for the flare has not yet acc umulated in corona (otherwise we do not know whether the magnetic field co nfiguration with which the calculation begins can be formed in the corona) . \n\nAn absolutely implicit upwind finite-difference scheme\, conservativ e with respect to magnetic flux\, has been developed for numerical solutio n of magnetohydrodynamic equations. Numerical methods which have been deve loped have the purpose to obtain a difference scheme that will remain stab le for the maximum possible time step to accelerate the calculation. The i mplicit scheme is solved by the iteration method\, in which the values at the central point of the template are taken at the next iteration for bett er convergence. The scheme is realized in the PERESVET computer program wr itten in FORTRAN. To speed up the computations\, parallel calculations are performed by computing threads on modern graphic cards (GPU) using CUDA t echnology. Carrying out the calculation in a reasonable time is complicate d by numerical instabilities that arise\, first of all\, near the boundary of the computational domain\, both photospheric one (on the surface of th e Sun) and non-photospheric one. The developed methods for stabilizing the se instabilities\, including the use of artificial viscosity and special m atching of quantities at the boundary\, made it possible to partially solv e this problem. The development of methods for stabilizing numerical insta bilities near the boundary of the computational domain continues.\nThe mag netic field configuration above the active region is so complicated that i t is practically impossible to determine the positions of the singular lin es and the current sheets formed in them directly from the magnetic field configuration. Therefore\, a graphical search system based on the appearan ce of a current density maximum in the middle of the current sheet has bee n developed for this purpose. Local current density maxima are searched fo r\, then the magnetic field configuration is analyzed in the vicinity of e ach of them. The longitudinal component of the magnetic field (directed al ong the singular line perpendicular to the plane of the current sheet conf iguration) can be small compared to the field in the plane of the configur ation and not hinder the instability of the current sheet\, thereby promot ing the appearance of a flare. In this case\, the magnetic lines in three- dimensional space can diverge significantly along the special line. Also\, the magnetic lines in three-dimensional space can be close to parallel\, which means a comparatively large longitudinal component of the magnetic f ield. In this case longitudinal magnetic field will stabilize the instabil ity of the current sheet\, thereby hindering the flare release of magnetic energy.\n\nIn the vicinity of the singular magnetic field line\, a diverg ent magnetic field (the mirror field created in plasma installations desig ned to solve the problem of controlled thermonuclear fusion) can be superi mposed on the X-type configuration. It creates a rotational motion around the singular line\, preventing the occurrence of a flare. The superpositio n of fields can be dominated by the X-type field or the divergent field.\n \nMHD simulation above the active region AR 10365 showed the appearance du ring flares and before flares in the bright region of flare or pre-flare e mission of a significant number of current density maxima with configurati ons promotable for the occurrence of solar flares. In the vicinity of thes e maxima\, there is a diverging magnetic field in space along a singular m agnetic line\, and there is no significant dominance of the diverging magn etic field above the X-type field in the plane of the current sheet. The p roblem is that maxima with such properties also occur outside the bright r egion of flare emission\, and in the bright region there are not very many such maxima compared to their total number. This problem of the coinciden ce of the flare positions found from the MHD simulation results with the o bserved flare positions can be solved by the appearance of a surface of in creased current density passing through a chain of current density maxima. To solve this problem\, we performed a detailed comparison of the MHD sim ulation results above the active region AO 10365 at 02:32:05 on May 26\, 2 003\, three hours before the M 1.9 flare\, with the 17 GHz radio emission observations obtained with the Nobeyama Radioheliograph. At this moment\, the energy for the flare is accumulated in the magnetic field of the solar corona and the plasma is heated by the currents that create this field. N ear the boundary of the region of bright pre-flare emission\, a chain of c urrent density maxima with field configurations that are not promote for f lares appearance. The surface of increased current density passing through this chain of current density maxima is actually a large current sheet of ~ 50\,000 km. This surface is an arcade of magnetic lines that is complet ely located in the region of bright pre-flare emission. At the top of the arcade\, there are no current density maxima\, but the current density the re is quite high\, differs little from the current density at the maxima\, and plane current density maxima arise. At the top of the arcade\, the fi eld configuration has properties that promote the appearance of flare inst ability: the dominance of the X-type field in the plane of the current she et configuration over the diverging magnetic field and a significant diver gence of magnetic lines in three-dimensional space along the direction of the singular line\, meaning a small value of the longitudinal component of the current sheet. The location of the arcade in the bright region of fla re emission confirms the possibility of the appearance of flare instabilit y at the top of the arcade\, which will propagate to a significant part of the arcade.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4 116/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4116/ END:VEVENT BEGIN:VEVENT SUMMARY:MODULATION OF THE ALL-PARTICLE SPECTRUM OF COSMIC RAYS IN AN ANISO TROPIC DIFFUSION APPROACH DTSTART;VALUE=DATE-TIME:20241025T150900Z DTEND;VALUE=DATE-TIME:20241025T152100Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4106@cern.ch DESCRIPTION:Speakers: Vladislav Borisov (Faculty of Physics\, M.V. Lomonos ov Moscow State University (MSU))\nThe cosmic ray (CR) spectrum measured a t Earth exhibits a knee-like feature around 4 PeV. Recently\, a significan t number of studies based on the analysis of experimental data from facili ties like LHAASO have indicated a potential spatial dependency of this fea ture.\n We present a new diffusion model for the propagation of cosmic ray s\, which accounts for the spatial dependence of spectral features. This m odel is based on the calculation of anisotropic components of the diffusio n tensor within a realistically simulated large-scale galactic magnetic fi eld. The parameters of the model are consistent with the contemporary unde rstanding of the structure of the large-scale galactic magnetic field and the dynamics of small-scale turbulent CR transport. We argue that transiti oning to an anisotropic description of CR transport allows for accurately delineating and describing the spatial dependence of the spectral features of CRs.\nIn this study\, the authors achieved the following: The modulati on of the spectra of galactic cosmic rays (GCRs) in the magnetic rigidity range of 1-30 PV (CR knee) for protons\, as well as for medium and heavy n uclei groups\, was demonstrated. The spatial variation of this phenomenon has been investigated. The observed modulation of the spectrum is explaine d by changes in the leakage mechanism.\n\nhttps://indico.particle.mephi.ru /event/436/contributions/4106/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4106/ END:VEVENT BEGIN:VEVENT SUMMARY:On the clustering method of large muon events on the LVD detector DTSTART;VALUE=DATE-TIME:20241025T145700Z DTEND;VALUE=DATE-TIME:20241025T150900Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4103@cern.ch DESCRIPTION:Speakers: Mark Simanovskiy (NRNU MEPhI)\nHypotheses of detecti on and clustering of events at the LVD detector based on partially ordered time series of readings of scintillation counters are considered [1\, 2]. Based on the ensemble technique\, a method for separating events has been developed. A comparison of event fullness with respect to the fixed windo w method is discussed. The results can be useful in statistical analysis o f the detector counters\, automation of the search for neutrino bursts and high multiplicity muons.\n\n\n[1] Agafonova\, N.Y.\, Ryazhskaya\, O.G. & LVD Collaboration. LVD—Multipurpose Russian–Italian Detector. Phys. At om. Nuclei 85\, 79–85 (2022)\n\n[2] Agafonova\, N.\, Aglietta\, M.\, Ant onioli\, P.\, Bari\, G.\, Bonardi\, A.\, Boyarkin\, V.\, Bruno\, G.\, Fulg ione\, W.\, Galeotti\, P.\, & Garbini\, M. On-line recognition of supernov a neutrino bursts in the LVD. Astroparticle Physics\, 28(6)\, 516–522. ( 2008)\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4103/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4103/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of the horizontal and upward going EASs with $E>10^{19} $ eV for the orbital experiments DTSTART;VALUE=DATE-TIME:20241025T144500Z DTEND;VALUE=DATE-TIME:20241025T145700Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4102@cern.ch DESCRIPTION:Speakers: Yeldos Sholtan (JINR)\nThe TUS experiment is the fir st orbital detector designed to measure Cherenkov and fluorescent radiatio n from extensive air showers in the Earth's atmosphere. The TUS detector h as registered a number of anomalous events of an unusual nature. One of th e possible interpretations of these events is upward going EAS initiated b y ultra high energy cosmic tau-neutrinos. The JINR is considering the proj ect of the IVGSHAL orbital experiment\, designed to study upward going and horizontal EAS. In the presented work\, a method of parametric modeling o f upward going EAS is presented.\n\nhttps://indico.particle.mephi.ru/event /436/contributions/4102/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4102/ END:VEVENT BEGIN:VEVENT SUMMARY:Cosmic ray events with electromagnetic showers triggered in the NU CLEON experiment DTSTART;VALUE=DATE-TIME:20241025T143300Z DTEND;VALUE=DATE-TIME:20241025T144500Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4111@cern.ch DESCRIPTION:Speakers: Stanislav Slepnyov ()\nThe NUCLEON satellite-based e xperiment is known for the discovery of the 10 TeV knee in the spectra of protons and other nuclei. This result was based on the analysis of events with hadronic showers trggered by the NUCLEON spectrometer using the KLEM method and the data from the microcalorimeter. However\, the Scintillator superfast trigger caused the spectrometer to register also the events with electromagnetic showers. Among the latter there appeared to be relatively more those with the directions coming from the Earth surface than from th e other ones. This excess might be caused by Earth emerging particles prod uced in the processes of neutrino conversion while their propagation throu gh the Earth. With the assumption of such possibilities a rough estimate o f the magnitude of neutrino flux can be made.\n\nhttps://indico.particle.m ephi.ru/event/436/contributions/4111/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4111/ END:VEVENT BEGIN:VEVENT SUMMARY:About the nature of anomalous events in the TUS detector DTSTART;VALUE=DATE-TIME:20241025T140900Z DTEND;VALUE=DATE-TIME:20241025T142100Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4112@cern.ch DESCRIPTION:Speakers: Khussein Karatash (JINR)\nTUS became the first orbit al detector to register events from cosmic particles of extremely high ene rgies by measuring fluorescence and Cherenkov radiation from extensive air showers in the Earth's atmosphere. At the same time\, it registered sever al dozen anomalous events\, which are the subject of the study presented i n this paper. Atmospheric gamma-ray bursts (TGF and TGE) are considered as their possible sources.\n\nhttps://indico.particle.mephi.ru/event/436/con tributions/4112/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4112/ END:VEVENT BEGIN:VEVENT SUMMARY:Mass composition of primary cosmic rays by the latest TAIGA-HiSCOR E data DTSTART;VALUE=DATE-TIME:20241025T135700Z DTEND;VALUE=DATE-TIME:20241025T140900Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4095@cern.ch DESCRIPTION:Speakers: Mark Ternovoy (API ISU)\nThis report presents the la test findings on the mass composition of primary cosmic rays based on data from the TAIGA-HiSCORE array\, which operated in its full configuration w ith four clusters. The TAIGA-HiSCORE stations were reoriented towards the zenith\, and new calibration procedures were introduced to improve the det ector array's performance. The study of extensive air showers (EAS) in the energy range of 1 to 100 PeV\, using the depth of the shower maximum\, sh ows good agreement with results from the LHAASO experiment\, particularly near the "knee" of the cosmic ray energy spectrum. An increase in the mean logarithmic mass in the 3-30 PeV energy range was also observed and exami ned.\n\nhttps://indico.particle.mephi.ru/event/436/contributions/4095/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4095/ END:VEVENT BEGIN:VEVENT SUMMARY:Uncovering Anomalies in Gamma-Ray Bursts: A Deep Learning Analysis of X-Ray Afterglows DTSTART;VALUE=DATE-TIME:20241025T134500Z DTEND;VALUE=DATE-TIME:20241025T135700Z DTSTAMP;VALUE=DATE-TIME:20260517T220205Z UID:indico-contribution-436-4101@cern.ch DESCRIPTION:Speakers: Nickolay Martynenko (MSU\, Physical Faculty / INR RA S)\nIn this study\, we analyze Gamma-Ray Burst (GRB) X-ray afterglow light curves from the Swift-XRT GRB catalogue using Autoencoder and Variational Autoencoder models with 1D-convolutional layers. The time series data are compressed into a 3D latent space\, from which we reconstruct the origina l light curves and identify anomalous GRBs based on their reconstruction e rrors. This approach proves to be effective in detecting a variety of anom alies. We also investigate correlations between latent features and additi onal catalogue data not used during training\, and apply topological techn iques to identify isolated clusters in the latent space. These findings de monstrate the potential of unsupervised deep learning for data analysis in astroparticle physics.\n\nhttps://indico.particle.mephi.ru/event/436/cont ributions/4101/ LOCATION: Moskvorechye 2 URL:https://indico.particle.mephi.ru/event/436/contributions/4101/ END:VEVENT END:VCALENDAR