BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Gravitational repulsion of spherical Voids (MOGA-model with large- scale force 1/$R$) DTSTART;VALUE=DATE-TIME:20261030T134000Z DTEND;VALUE=DATE-TIME:20261030T134500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6455@cern.ch DESCRIPTION:Speakers: Ivan Zhogin (ISSCM SB RAS)\nFlat rotation curves of galaxies suggest extra gravity at galactic scales\, which is usually expla ined by dark matter (DM). However\, astrophysicists \n([P. Kroupa et al][1 ])\npoint to facts and data that contradict the DM hypothesis. Instead\, t he MOND model is advocated. The baryonic Tully–Fisher relation\n $\\log M_ {\\rm bar} = c + b \\log V_{\\rm flat}$ links the baryonic mass of spir al galaxies with their asymptotic velocity. MOND requires $b = 4$. The $M_ {\\rm bar}$ includes stars\, atomic and molecular gas (i.e. HI/HeI/H2\; fo r dwarfs\, HII component is important because intergalactic radiation ioni zes HI\, as N.Gnedin noted). Conducting calculations is hard and requires assumptions and/or modeling. In $[1{]}$ slope $b \\approx 3$ was obtained for 32 spirals ($V_{\\rm flat} \\approx 45...280$ km/s\; HII mass was not estimated). Slope $b = 2$ appears in modeling [2\;App.G] (luminosity is sq uare of mass\, $L_{\\rm gal} \\approx M_{\\rm gal}^2$\, except for dwarfs) . This slope prefers (large scale) gravity force $F \\sim M_{\\rm bar}/R$\ ; some authors called it MOGA\, MOdified Gravity Attraction\, $[3]$. MOGA appears also in one 5$D$-variant of Teleparallelism with $4^{\\rm th}$-ord er gravity and expanding brane-universe [4]: Newton's law turns to $F(R) = GMm/(LR)$ when $R > L$ ($L$ is the brane co-moving thickness along the ex tra-dimension). As it is stated in $[3]$\, MOGA\, unlike MOND\, preserves the momentum and angular momentum\, as well as stability of three-body sys tems. \n\nLet's consider large scales\, $R > L$. For thin disks (SO${}_2$- symmetry\; plain $1/R$-model)\, the force in the disk plane at radius $R$\ , $F(R)$\, depends on the mass $M_R$ inside this radius: $ F = G m M_R /( LR)$\; on the axis $Z$ (uniform disc of radius $a$\; 'test-mass' $m$) the attraction force is \n$ \\ \\ F(Z) = G m M_a Z \\ln(1 + a^2/Z^2) /(L a^2) . \\\\ $ \n$ \\ \\ {\\rm For}$ uniform spherical balls (bulges\; radius $ a$)\, we find: \n$\\ \\ F(R) = G mM /(L a) \\ \\\, f (R/a) \, {\\rm \\ wh ere } \\\\$\n $ \\ \\ \\ \\ f (x) = \\frac38 \\{1/x + x\\\, –\\frac12 ( 1/x\\\, – x)^2 \\ln[(x + 1)/|x\\\, – 1|]\\}\;$\n it is maximal at $x = 1$\, $f (1) = 3/4. \\\\ $\nThis function is symmetrical for the substit ution $x → 1/x$\, so similar series exist for small and large $x$: $\\\\ $ \n $ \\ \\ \\ \\ f (x) = x\\{1 – x^2/5 – … – 3 x ^{2n}/[(2n – 1)(2n + 1)(2n + 3)] – …\\} = 1/x\\{1 – 1/(5x^2) – … \\} . \\\\$\nOne can further integrate (in parts) this function and fi nd the potential:$\\\\ $\n $\\ \\ \\ \\ u(x) = \\int\\! f (y)\\\, d y = \\frac12 \\ln|x^2 – 1| + \n\\frac{x^2}8 – \\frac{x^4 – 6x^2 – 3}{16x} \\ln \\frac{x + 1}{|x – 1|} + C$.\n\n Logarithmic po tential growth stops when «underdensities» appear\, and cosmic voids sho uld be objects with negative masses. Our MW galaxy resides in the KBC void (one among the largest – redshift z is small) with a shift from its cen ter. Defocusing caused by the KBC void provides some extra-dipoles (redshi ft dependent). Further we are considering a simple model of spherical void s with a massive shell\, which consists of two co-centered uniform balls w ith positive and negative densities\, $\\rho_b$ and $–\\rho_a$\, of radi us $b$ and $a$\, respectively.\nLet the total shell mass is $M_S = \\rho_ b V_b – \\rho_a V_a = \\rho_0 V_b$\, where $\\rho_0 \\sim 0.04 \\rho_c $ is the mean baryonic density of the Universe. And take\, for simplicity \, $\\rho_b = \\rho_a$ (an absolutely empty void)\, and $b = \\varepsi lon\\\, a$ (with\, say\, $\\varepsilon = 1.1$). One can can find the fol lowing void potential (again\, $x = r/a$)\n $ \\ U(x) = G M_S L^{-1} \\\, u^*(x)$\, where \n$ \\ u^*(x) = [u(x/\\varepsilon ) – u(x)]/(\\varepsilon^3 – 1)$. \nWe took into account that the unifor m density $\\rho_0$ gives no gravity\, no potential (the case $a → 0$ ). \nFor very thin shells\, $a → b$ and \n$\\varepsilon → 1$\, we fi nd $ u^*(x) → – x f (x)/3$ and repulsion \nis ${\\propto} (x f' + f)/ 3$. \n\n1. Ponomareva A.A. et al. From light to baryonic mass: the effect of the stellar mass-to-light ratio on the Baryonic Tully–Fisher relation // MNRAS. 2018. V.474. 4366. [hal-02117129f][2] \n2. Valageas P.\, Schaef fer R. The mass and luminosity functions of galaxies and their evolution / / Astron. Astrophys. 1999. V. 345\, 329\;\n arXiv: astro-ph/9812213. \n3. Toxvaerd S. Approximations and modifications of celestial dynamics tested on the three-body system. arXiv:2512.03823 [gr-qc] \n(see also arXiv:2403. 02848 [astro-ph.GA]). \n4. Zhogin I.L. Longitudinal waves in 5D Absolute P arallelism and relativistically expanding brane cosmology // Space\, Time & Fund. Inter. 2025. No.2. 40 (Rus.\; stfi.ru/en/\; also see [sciforum.net /paper/28941][3])\n\n\n [1]: https://darkmattercrisis.wordpress.com/\n [ 2]: https://hal.science/hal-02117129v1/document\n [3]: http://sciforum.ne t/paper/28941\n\nhttps://indico.particle.mephi.ru/event/626/contributions/ 6455/ LOCATION: Hall URL:https://indico.particle.mephi.ru/event/626/contributions/6455/ END:VEVENT BEGIN:VEVENT SUMMARY:FROM QUARK CORRELATIONS TO VIRTUAL CLUSTERS IN NUCLEI DTSTART;VALUE=DATE-TIME:20261030T133500Z DTEND;VALUE=DATE-TIME:20261030T134000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6482@cern.ch DESCRIPTION:Speakers: Genis Musulmanbekov (JINR)\nWe propose the quark mod el of nuclear structure where quark correlations lead to nucleon-nucleon c orrelations and arrangement of them into lattice--like structure. The mode l is based on the quark model of nucleon structure in which valence quarks are strongly correlated within a nucleon (SCQM). Nuclei are built by junc tions of SU(3) color fields of two quarks of neighboring nucleons. Applica tion of the model to the larger collections of nucleons reveals the emerge nce of the face-centered cubic (FCC) symmetry at a nuclear level where nuc leons arrange in alternating spin-isospin layers. The model becomes isomor phic to the shell model and composes the features of the liquid drop and c luster models. It turns out that building blocks of the nuclear structure are three-nucleon and four-nucleon configurations. These configurations fo rm inside nuclei virtual triton\, 3He and α- clusters. Applying the model to construct the isotopes of He and Li nuclei we demonstrate that ’hal o’ nuclei are consequences of quark loops forming three-nucleon configur ations. The model can predict the boundary of the maximal number of neutro n excess\, i.e. neutron drip line. Also we apply the model to analyze nucl eosynthesis in stars in the framework of α-clustering.\n\n1. G. Musulmanb ekov\, PEPAN Lett. № 5\, p. 548 (2021)\; Adv. Nucl. Sci. Appl.\, v1\, № 2\, p. 105 (2025)\;\nhttps://doi.org/10.63907/ansa.v1i2.34\n2. G. Musu lmanbekov\, Adv. Nucl. Sci. Appl.\, v1\, № 4\, p. 250 (2025)\;\nhttps:// doi.org/10.63907/ansa. v1i4.53.\n\nhttps://indico.particle.mephi.ru/event/ 626/contributions/6482/ LOCATION: Hall URL:https://indico.particle.mephi.ru/event/626/contributions/6482/ END:VEVENT BEGIN:VEVENT SUMMARY:GRISP Scientific Instrument Suite for High-Energy Solar Radiation Studies
and Monitoring aboard the ARKA Space Complex DTSTART;VALUE=DATE-TIME:20261030T133000Z DTEND;VALUE=DATE-TIME:20261030T133500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6485@cern.ch DESCRIPTION:Speakers: Mikhail Korotkov (National Research Nuclear Universi ty MEPhI (Moscow Engineering Physics Institute))\nStudies of solar activit y and prediction of the effects of coronal mass ejections and high-energy radiation from solar flares on near-Earth space and the biosphere are amon g the major objectives of solar and solar–terrestrial physics. The GRISP (Gamma -\, X-radianion and Solar Protons) instrument suite is designed to measure the energy and time distributions and intensities of electromagne tic radiation from solar flares over the energy range from 50 keV to 200 M eV\, and to detect solar protons with energies above 20 MeV and neutrons w ith energies above 30 MeV. CeBr₃ and CsI(Tl) inorganic scintillation det ectors measure X-ray and gamma-ray radiation in the energy ranges 0.05–1 5 MeV and 0.2–200 MeV\, respectively. Neutrons with energies above 30 Me V are additionally identified in the CsI(Tl) detector from the scintillati on pulse shape. Solar protons are detected by a multilayer detector compos ed of polystyrene scintillators. The proton energy is determined from the particle range and energy losses in the individual layers. This technique enables reconstruction of the energy spectrum and measurement of the flux intensity of solar protons above 20 MeV\, as well as studies of their temp oral behaviour. Simultaneous measurements in these energy ranges are impor tant for understanding particle-acceleration models in solar flares and fo r identifying precursor signatures relevant to space-weather forecasting\, in particular solar proton events (SPEs) and ground-level enhancements (G LEs). The energy resolution and detection efficiency of GRISP enable measu rements of line and gamma-ray emission from X-class solar flares\, as well as solar-proton fluxes above 100 MeV at intensities exceeding 1 particle cm⁻² s⁻¹ sr⁻¹ (pfu)\, while the detection system supports a maxim um counting rate of 10⁵ s⁻¹.\n\nhttps://indico.particle.mephi.ru/even t/626/contributions/6485/ LOCATION: Hall URL:https://indico.particle.mephi.ru/event/626/contributions/6485/ END:VEVENT BEGIN:VEVENT SUMMARY:The peculiarities in Ia supernovae redshift distribution obtained due preliminary studies results of the Open Supernova catalogue data DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6509@cern.ch DESCRIPTION:Speakers: I.V. Arkhangelskaja (NRNU MEPhI )\nThe interest of t he scientific community on supernovae (SNe) has increased in the recent ye ars for several reasons. Mostly they are the advances in the understanding of the SN phenomena obtained with the intensive study of nearby SNe\, fir st of all SN 1987A\, which have raised new more fundamental questions with regard to progenitor evolution\, explosion mechanism and nucleosynthesis. \nThe Open Supernova Catalog (OSC) is an online dataset contains metadata and observational results for approximately $10^5$ supernovae.The prelimi nary results of OSC data analysis show that several peculiarities are pres ented in Ia supernovae redshift distribution. The deviation in the band 0. 015 \n\nhttps://indico.particle.mephi.ru/event/626/contributions/6509/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6509/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDY OF 6He – 4He SCATTERING AT THE ACCULINNA-2 FRAGMENT SEPARA TOR DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6505@cern.ch DESCRIPTION:Speakers: Danila Makarov (Flerov Laboratory of Nuclear Reactio ns\, JINR\, Dubna\, Russia\; National Research Nuclear University MEPhI\, Moscow\, Russia)\nThis work presents the results of an experiment performe d at the ACCULINNA-2 fragment separator (FLNR JINR) aimed at studying the elastic and inelastic scattering of ^{6}He + ^{4}He over a wide angular ra nge. A secondary 6He beam with an energy of 151 (168) MeV irradiated a 5.5 -mm thick cryogenic gaseous ^{4}He target maintained at a temperature of 1 2 K and a pressure of 1 (2) atm. The reaction products were registered in a two-arm geometry using the detector system described in [1].\nThe primar y objective of the investigation was to determine the differential cross s ections for the ^{6}He + ^{4}He → ^{4}He + ^{6}He(g.s.) and ^{6}He + ^{4 }He → ^{4}He + ^{6}He(2+) channels. For the channel populating the groun d state of 6He\, the angular distribution in the center-of-mass system (c. m.s.) was obtained across a wider angular range and with better resolution than in previous measurements [2]. In particular\, new data were obtained for Θ_{c.m.s.} ~ 15°–60° and\, most notably\, for the Θ_{c.m.s.} ~ 130°–165° range\, which corresponds to the two-neutron transfer reacti on mechanism. The angular distribution for the channel involving the excit ation of the 6He(2^{+}) state was extracted by selecting events with the s imultaneous detection of two alpha particles. Consequently\, the angular d ependence of the cross section in the 130°–165° region was obtained fo r the first time. The optical model was applied to describe the data at fo rward angles\, whereas the FRESCO and DWUCK5 codes were utilized for the b ackward angles.\nIn addition\, the spectrum of highly excited states of 6H e\, obtained via the missing mass method in the ^{6}He + ^{4}He → ^{4}He + ^{6}He* (^{4}He+n+n) reaction\, was analyzed separately. It is demonstr ated that this spectrum is formed by the contribution of a peak correspond ing to the 2^{+} state at E_{ex} = 1.8 MeV\, alongside a long "tail" most likely attributed to negative parity states. In the ^{4}He–t coincidence s\, a peak presumably associated with the dipole mode was observed at E_{e x} = 26–27 MeV\, which is induced by the breakup of the alpha cluster in 6He. The mechanism underlying the emergence of potential background event s at excitation energies of 15 MeV and above\, as well as methods for thei r elimination\, are discussed.\nReferences\n1. A. A. Bezbakh\, S. G. Belog urov\, V. Chudoba et al.\, Detector Array for the 7H Nucleus Multi-Neutron Decay Study\, Phys. Part. Nuclei Lett. 20\, 629–636 (2023).\n2. G. M. T er-Akopian\, A. M. Rodin\, A. S. Fomichev et al.\, Two-neutron exchange ob served in the ^{6}He+^{4}He reaction. Search for the "di-neutron" configur ation of 6He\, Phys. Lett. B 426\, 251–256 (1998).\n\nhttps://indico.par ticle.mephi.ru/event/626/contributions/6505/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6505/ END:VEVENT BEGIN:VEVENT SUMMARY:Analytical description of atmospheric muon spectra at large zenith angles DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6501@cern.ch DESCRIPTION:Speakers: Khristina Kotseva (Sirius University of Science and Technology\, National Research Nuclear University MEPhI)\nAtmospheric muon spectra are used in a range of cosmic-ray studies\, including investigati ons of extensive air showers\, atmospheric particle production\, and atmos pheric neutrino fluxes\, as well as for validating particle-transport and cascade models. In particular\, the spectrum is critical for estimating ma tter distribution in muography. For practical applications\, compact analy tical parameterizations are preferable to computationally demanding Monte Carlo simulations\, for example\, when optimizing detector configurations or estimating exposure times. However\, the accuracy of commonly used para meterizations at large zenith angles remains an important issue.\nWe teste d four analytical parameterizations of the differential atmospheric muon e nergy spectrum - Tang\, Shukla\, Reyna\, and Bogdanova - against an indepe ndent experimental database from nine experiments\, covering zenith angles from 0° to 90°. None of the considered parameterizations with published parameters provides satisfactory agreement with the experimental data ove r the full zenith-angle range. By fitting each zenith interval we obtained the systematic angular dependence of the model parameters. This indicates that the existing functional forms do not completely capture the angular dependence of the muon spectrum. \nThese results motivate further developm ent of functional forms or parameterizations with angle-dependent paramete rs\, which could improve the accuracy of atmospheric muon flux for applica tions. Additional experimental measurements\, especially at large zenith a ngles could also help improve the description of these dependences.\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6501/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6501/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing Lorentz Invariance Violation with Air-Shower Maximum Distr ibutions DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6500@cern.ch DESCRIPTION:Speakers: Nickolay Martynenko (Lomonosov MSU\, Faculty of Phys ics & Institute for Nuclear Research\, RAS)\nLorentz invariance violation (LIV) can modify electromagnetic interactions at ultra-high energies and t hereby affect the development of extensive air showers (EASs). We study a subluminal photon-sector LIV scenario in which Bethe–Heitler pair produc tion is suppressed. Using LIV-modified EAS simulations\, we model the resu lting changes in the depth of shower maximum\, $X_{\\max}$\, and reconstru cted energy. The predictions are folded with the published Pierre Auger Ob servatory fluorescence-detector response and compared with the measured $X _{\\max}$ distributions\, allowing the primary composition to vary. Within this simplified analysis\, we obtain the 95% confidence-level constraint $M_{\\rm LIV}>1.5\\times10^{21}\\\,\\text{GeV}$\, where $M_{\\rm LIV}$ is the characteristic LIV energy scale in the photon sector. This result demo nstrates the potential of hadron-induced EASs for probing photon-sector LI V.\n\nThis work was supported by the Russian Science Foundation\, grant 22 -12-00253(P). The speaker acknowledges a PhD student fellowship from the T heoretical Physics and Mathematics Advancement Foundation “BASIS” unde r contract 24-2-10-39-1.\n\nhttps://indico.particle.mephi.ru/event/626/con tributions/6500/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6500/ END:VEVENT BEGIN:VEVENT SUMMARY:Heavy-Ion Track Structure and Target Dose Deposition Simulations U sing Geant4-DNA DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6506@cern.ch DESCRIPTION:Speakers: Matvey Vologzhin (Tomsk State University)\nHeavy ion s within the Galactic Cosmic Ray (GCR) spectrum present a primary challeng e for radiation risk assessment in deep-space exploration and astroparticl e physics. Accurate description of their biological effectiveness requires multi-scale Monte Carlo simulations that account for both nanoscale stoch astic ionization patterns and macroscopic energy deposition in target volu mes.\n\nIn this work\, we investigate the performance and applicability of the Geant4 and Geant4-DNA toolkits for modeling the track structure of ch arged particles\, ranging from light ions to intermediate-mass nuclei. Ben chmark calculations were conducted for critical physical and nanodosimetri c endpoints\, specifically Radial Dose Distributions (RDD) and Ionisation Cluster Size Distributions (ICSD)\, across different particle energies and physics constructors. \n\nIn addition\, we examine a multi-scale simulati on framework to evaluate absorbed dose distributions in target geometries\ , accounting for particle transport through surrounding structural materia ls. The impact of the secondary radiation field generated along the beam p ath on the resulting spatial dose profile is assessed. This study demonstr ates the connection between validated nanoscale track-structure metrics an d macroscopic dose calculations\, providing a robust methodological founda tion for radiation transport modeling in space radiobiology.\n\nhttps://in dico.particle.mephi.ru/event/626/contributions/6506/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6506/ END:VEVENT BEGIN:VEVENT SUMMARY:Centrality and Event Registration Efficiency Determination in Xe+C sI Collisions at BM@N DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6499@cern.ch DESCRIPTION:Speakers: Dim Idrisov ()\nCentrality determination is an essen tial step in the analysis of heavy-ion collisions and the comparison of ex perimental results with model calculations. At beam energies of a few GeV per nucleon\, trigger selection and the primary-vertex reconstruction requ irement preferentially suppress peripheral events. Accounting for these lo sses is necessary to define centrality classes relative to the total inela stic nucleus–nucleus cross section.\nThis work presents centrality deter mination results for Xe+CsI collisions at a beam energy of 3.8A GeV using data from the first BM@N physics run. The analysis employs charged-particl e multiplicity and two approaches: the Monte Carlo Glauber method and a mo dified direct reconstruction method based on Bayes’ theorem. In the latt er approach\, the conditional multiplicity distribution at a fixed impact parameter is described by a gamma parametrization using fully reconstructe d simulated events. The multiplicity dependence of the event registration and selection efficiency is reconstructed with both methods\, while its im pact-parameter dependence is also obtained with the direct reconstruction method.\nThe sensitivity of the results to nuclear geometry parameters\, t he inelastic nucleon–nucleon cross section\, and the choice of transport model is investigated. The Monte Carlo Glauber method yields an integrate d efficiency of 72.72%\, with deviations of −1.55 and +0.86 percentage p oints corresponding to the envelope of the variations considered. The mean and standard deviation of the direct reconstruction results obtained usin g DCM-QGSM-SMM\, UrQMD-AMC\, JAM2 MD2\, and SMASH are (72.8 ± 1.0)%. Thes e estimates characterize the model-related uncertainty components investig ated. The shape of the multiplicity-dependent efficiency is validated by c omparing experimental distributions recorded with the CCT2 and BT triggers . The two methods yield consistent results\, with the largest model depend ence observed in the peripheral region.\n\nhttps://indico.particle.mephi.r u/event/626/contributions/6499/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6499/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of Astrophysical Sources\, Including the Sun\, via R adio Interferometry Using AX-Offset D90 Antennas DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6507@cern.ch DESCRIPTION:Speakers: Irene . Arkhangelskaja (NRNU MEPhI)\nExtreme energy release in astrophysical sources\, including the Sun\, is associated with the acceleration and interaction of elementary particles—specifically\, with the conversion of magnetic field energy. Consequently\, the systemati c study of radio emission from these sources with high angular resolution makes it possible to identify the mechanisms of particle acceleration\, pl asma heating during flares\, and energy transport processes. \nThis paper discusses the use of offset-focus parabolic mesh antennas (AX-Offset D90) to create the MEPhIst radio interferometer prototype and the scientific in strument itself. The MEPhIst radio interferometer will be based on two spa rse-aperture antenna arrays with maximum baseline lengths of l1max ≈ 49 m and l2max ≈ 61 m. Each antenna field consists of two arrays with a spe cial configuration and comprises up to 46 and 79 individual antenna elemen ts (Main Antenna Modules—MAMs\, based on the AX-Offset D90 antenna)\, re spectively\; the overall system dimensions are ~ 450 m\, which will provid e an angular resolution ranging from ~0.12° to $5.70·10-3° in the frequ ency range of 0.3000–6.5000 GHz. The prototype system will also consist of two arms\; however\, each will comprise a T-shaped array of five MAM mo dules with an initial maximum baseline of l0 ≈ 30 m\, which can be exten ded to l01max ≈ 53 m and l02max ≈ 54 m\, respectively. This configurat ion simplifies the development of techniques for image reconstruction and object coordinate determination. The low weight and compact dimensions of each individual antenna module—based on the AX-Offset D90 design—will allow the system's antenna arrays to be mounted on the roofs of MEPhI buil dings using surface-laid cable runs\; this will significantly reduce equip ment costs compared to interferometers based on traditional parabolic ante nnas (which require underground cabling due to the substantial mass and si ze of individual antenna units). \nA prototype antenna module is currently being developed and assembled at the Department of Experimental Nuclear P hysics and Cosmophysics at NRNU MEPhI. Preliminary calibration has been pe rformed at a frequency of 1.0009 ± 0.0001 GHz\, and an increase in the re ceived signal level has been demonstrated when pointing the antenna at the Sun. \nOne of the primary scientific objectives of the MEPhIst radio inte rferometer will be to study the radio emission from both solar flares and the "quiet" Sun\; this will enable further research into electron accelera tion mechanisms\, plasma heating during flares\, and energy transport proc esses\, as well as the detection and study of shock waves and the evolutio n of large-scale structures in the solar atmosphere. Another application o f the facility will be the development of methods for monitoring solar act ivity in the radio range—specifically\, continuing the comparative analy sis of geomagnetic events identified using various indices. \nThe MEPhIst radio interferometer can be used for Galactic research\, including the stu dy of the discrete radio source Sgr A\, the Galactic radio halo\, and neut ral hydrogen clouds (HI line)\, as well as discrete sources and distributi ons in the HII (1415 MHz)\, H3 (1517 MHz)\, Na23 (1772 MHz)\, Al27 (1506 M Hz)\, and OHI (1666 MHz) lines\, among others\; it also enables the analys is of emission properties in recombination lines. \nOne of the primary obj ectives of the MEPhIst scientific facility will be to study the properties of transient sources both within our Galaxy and beyond: investigating rad io pulsar period variations (including those located in the Galactic halo) \, examining the characteristics of non-stationary radio emission from mag netars\, and studying radio bursts that fall within the instrument's field of view. Furthermore\, the instrument allows for the study of emission ch aracteristics in the neutral hydrogen (HI) spectral line at various redshi fts\, making it possible to establish the principles of the Gal_z scale— an initiative aimed at resolving the discrepancy in Hubble constant (H0) v alues\, which is a key challenge in modern cosmology. This unique new scal e will be employed for the first time\, complementing existing scales base d on data from supernovae (SN) and the cosmic microwave background (CMB).\ n\nhttps://indico.particle.mephi.ru/event/626/contributions/6507/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6507/ END:VEVENT BEGIN:VEVENT SUMMARY:Prospects for searching for the neutrino magnetic moment in proces ses of solar neutrino scattering on superfluid helium-4 DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6498@cern.ch DESCRIPTION:Speakers: Ivan Stepantsov (Faculty of Physics\, Lomonosov MSU) \nThe processes of solar neutrino scattering by the H and He atoms are con sidered. Along with the weak neutrino-electron interaction\, the electroma gnetic interaction due to the neutrino magnetic moment $\\mu_\\nu$ is also taken into account. This study can be useful for the analysis of data fro m neutrino as well as dark matter experiments. Specifically\, it could be useful to estimate the irreducible solar background in the SArov Tritium-U ltra-Reach Neutrino Experiment (SATURNE)\, which is under preparation with in the scientific program of National Center for Physics and Mathematics. One of the main goals of SATURNE is the search for the neutrino magnetic m oment\, which is the most studied among neutrino electromagnetic (EM) prop erties and the discovery of which will open a window to physics beyond Sta ndard Model (SM). For this purpose\, a high-intensity tritium source of el ectron antineutrinos will be employed in combination with different detect ors\, including the detector based on He-II.\nWe calculate numerically the SM and EM neutrino-electron and neutrino-atom recoil spectra in the He de tector in SATURNE for the case of solar neutrinos arising from the solar n uclear reactions. The obtained event rates are used to estimate the detect or sensitivity to $\\mu_\\nu$ of solar neutrinos. \nIn addition\, we study the differential cross sections of tritium neutrino scattering by electro ns in the H atoms and outline characteristic deviations from the customary free-electron approximation.\n\nhttps://indico.particle.mephi.ru/event/62 6/contributions/6498/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6498/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of radioactive purity of WLS plates for water Cheren kov detectors DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6497@cern.ch DESCRIPTION:Speakers: Vladimir Kazalov (INR RAS)\nThe next generation wate r Cherenkov detector Hyper-Kamiokande in its outer part will utilize light -collection modules composed of a PMT surrounded by a plexiglass-based WLS plate. Success of the rich physics program of the experiment that ranges from energetic atmospheric and accelerator and down to cosmic and solar n eutrinos involves strict requirements and control of the radiopurity of th e elements used in the detector. The talk presents the results of the chec ks of the specific activity of natural radionuclides in the samples of the WLS plates. The work was carried out in two underground laboratories of t he Baksan Neutrino Observatory of INR RAS: the “NIKA‑2” facility loc ated at a depth of 660 m water equivalent and the “SNEG” spectrometer in the DUBL‑4900 hall at a depth of 4900 m.w.e.. The measurements were p erformed with the HPGe-based gamma-detectors. The final sensitivity of mBq /kg was achieved. It was demonstrated that the samples of the mass-product ion WLS plates possess low natural radioactivity that fulfils the requirem ents set by the Hyper-Kamiokande physics program. The work confirms the ef fectiveness of the low‑background gamma‑ray spectrometry technique for the quality control of materials used in large‑scale neutrino detectors .\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6497/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6497/ END:VEVENT BEGIN:VEVENT SUMMARY:Wave packet approach for description of Majorana neutrino oscillat ions in a magnetic field DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6496@cern.ch DESCRIPTION:Speakers: Aleksandr Tcvirov (Department of Theoretical Physics Moscow State University)\nMajorana neutrino oscillations in a magnetic fi eld are considered using the wave packets formalism. The dispersion relati on for neutrinos with non-zero transition magnetic moments propagating in a magnetic field is found in the two flavour case. It is shown that for Ma jorana neutrinos propagating in a magnetic field the coherence length coin cides with the coherence length for neutrino oscillations in vacuum when t he vacuum frequency is much greater than the magnetic frequency\, while it is proportional to the cube of the average neutrino momentum if. We show that the decoherence effect may appear during neutrino propagation in a ma gnetic field of supernova.\n\nhttps://indico.particle.mephi.ru/event/626/c ontributions/6496/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6496/ END:VEVENT BEGIN:VEVENT SUMMARY:Data processing and event selection for measuring polarization cor relations of annihilation photons at large Compton scattering angles DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6495@cern.ch DESCRIPTION:Speakers: Mikhail Evsiukov (INR RAS)\nWe describe the experime ntal setup and data analysis procedure developed for measuring polarizatio n correlations of 511 keV annihilation photons after Compton scattering at angles from 60° to 120°. The setup consists of two arms of Compton pola rimeters with intermediate pre-scatterers placed in front of the main scat terers. Each arm is equipped with a ring of 16 scintillation counters cove ring the full azimuthal range. The upgrade of the setup for large-angle me asurements and the corresponding changes in the data acquisition are discu ssed. The data processing pipeline includes energy calibration of all dete ctors with temperature drift correction\, time-based selection of coincide nce events\, identification of pre-scattering interactions in the intermed iate scatterer\, and reconstruction of the scattering angle from the measu red energy deposit. The classification of events into bins by scattering a ngle and the extraction of the visibility parameter from azimuthal angular distributions are described in detail. The entire procedure is validated against Monte Carlo simulations performed with the Geant4 toolkit. The res ulting data set provides the input for the physics analysis of entanglemen t evolution during Compton scattering.\n\nhttps://indico.particle.mephi.ru /event/626/contributions/6495/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6495/ END:VEVENT BEGIN:VEVENT SUMMARY:TOF CORRECTION METHOD FOR INSTALLATIONS WITH HEAVY CRYSTALS FOR CR EATING A NEUTRON DETECTOR DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6487@cern.ch DESCRIPTION:Speakers: Georgyi Taer (NRC KI)\nNeutron detection is based on the registration of secondary charged particles arising in nuclear reacti ons with the detector material. The efficiency is determined by the reacti on probability and the linear dimensions/material of the detector. \nFor t ime-of-flight measurements\, fast scintillators or gas detectors are usual ly used. A promising improvement is to replace part of the passive layers with active layers made of bismuth orthogermanate (Bi₄Ge₃O₁₂\, BGO ). BGO is characterized by high density ($\\rho$ ≈ 7.13 g/cm³)\, low ra diation length (~1.13 cm)\, radiation resistance\, absence of afterglow\, and a light yield of ~7000 photons/MeV. The absence of cleavage planes all ows the crystals to be shaped into any form. Due to its higher density com pared to NaI(Tl) and CsI(Tl) and other popular scintillators\, BGO provide s higher efficiency in detecting photons and neutrons for the same volume. However\, the high density causes partial self-absorption of photons\, re ducing the signal amplitude\, which is compensated for by modern electroni cs with a high signal-to-noise ratio. \nA significant drawback of heavy sc intillators is the long rise time of the signal (>100 ns)\, which makes th eir use for the time-of-flight method difficult. Nevertheless\, the requir ements for the neutron detector being developed include the possibility of using the time-of-flight (TOF) method. \nThis paper demonstrates the fund amental possibility of using BGO for the TOF method.\n\nhttps://indico.par ticle.mephi.ru/event/626/contributions/6487/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6487/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutron-rich isotopes production in Heavy-Ion Collisions Using the COMBAS Fragment Separator and comparison with model predictions DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6486@cern.ch DESCRIPTION:Speakers: Erdemchimeg Batchuluun (JINR)\nIsotope and velocity distributions of neutron-rich isotopes produced in peripheral heavy-ion co llisions are investigated using the high-luminosity\, strong-focusing ki nematic fragment separator COMBAS at the U400M cyclotron facility. Full sy stematic study of the short-lived isotopes produced in collisions induced with 18O (at 35 MeV/nucleon)\, 22Ne (at 42 MeV/nucleon)\, and 40Ar (at 36 MeV/nucleon) primary beams on 9Be and 181Ta targets are presented. Experim ental data were compared with model predictions\, namely\, empirical param etrization of fragmentation cross-sections (EPAX)\, the abrasion–ablatio n (AA) model and combined transport-statistical approach (BNV – SMM) to evaluate the accuracy of the model predictions and suggest the ways for im proving them.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/ 6486/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6486/ END:VEVENT BEGIN:VEVENT SUMMARY:Constraints on millicharged particles from thunderstorms on the So lar system planets DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6483@cern.ch DESCRIPTION:Speakers: Ekaterina Dmitrieva (INR RAS)\nWe investigate the pr oduction of millicharged particles (mCPs) by the Schwinger mechanism in th understorms in the atmospheres of different planets in the Solar system. W e consider a thundercloud as a giant capacitor that can be discharged in t wo ways: either by lightnings or by mCP production. Taking into account th e observation of lightning strikes\, we establish the constraints on the c harge and mass of mCPs. We examine two types of cloud configurations: a si mple arrangement of two clouds\, and a more complex layered structure that gives rise to potential wells. In the latter case\, we take into account the effects of Bose enhancement for scalar mCPs\, and Pauli blocking for f ermionic ones. \n We use the observational data of planetary atmospheres obtained by satellite missions to establish constraints on the charge and mass of mCP particles. The best constraints came from the observation of t hunderstorms in Saturn's atmosphere under an assumption of layered cloud s tructure: we obtain a lower limit on the charge of $10^{-24}$ for bosonic mCPs. These constraints for bosons are\, to the best of our knowledge\, th e best in the literature.\n\nhttps://indico.particle.mephi.ru/event/626/co ntributions/6483/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6483/ END:VEVENT BEGIN:VEVENT SUMMARY:Muonography in Geoecology DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6504@cern.ch DESCRIPTION:Speakers: Daria Strekalina (2 Autonomous Non-Profit Educationa l Organization of Higher Education “Sirius University of Science and Tec hnology”\, Sirius Federal Territory\, Russia)\nMuonography is an innovat ive method for investigating the internal structure of massive natural and industrial objects using fluxes of high-energy atmospheric muons. Its ran ge of applications is broad\, extending from mineral exploration to the as sessment of natural and man-made risks to civil infrastructure. In geology and geophysics\, it serves as a promising tool that complements tradition al approaches and acts as an independent experimental method for forecasti ng seismic and volcanic processes\, as well as for assessing deformation i n fault\, landslide\, and karst zones. The paper presents the first geoeco logical experiment conducted at Mount Bytkha (Sochi)\, involving the model ing and optimization of detectors to identify zones of fracturing.\n\nhttp s://indico.particle.mephi.ru/event/626/contributions/6504/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6504/ END:VEVENT BEGIN:VEVENT SUMMARY:NICER Spectral-Timing Constraints on the Nature of IGR J17285−29 22 DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6480@cern.ch DESCRIPTION:Speakers: Dervis Ersin Tokbay (Department of Astronomy and Spa ce Sciences\, Faculty of Science\, Erciyes University)\nIGR J17285−2922 is a very faint transient low-mass X-ray binary whose compact object has n ot yet been securely identified. Its consistently hard X-ray spectra durin g detected outbursts and its multiwavelength behaviour favour a black hole interpretation\, although a neutron star primary has not been excluded. W e investigate the nature of the compact object using two archival NICER ob servations obtained during the 2019 outburst that were not included in pre vious studies\, providing a total cleaned exposure of approximately 3 ks. Our analysis combines X-ray spectroscopy with high-time-resolution variabi lity diagnostics. The NICER energy spectra are compared with quasi-simulta neous Swift/XRT measurements to characterize the X-ray flux and spectral s tate of the source. Energy-resolved power-density spectra\, broad-band fra ctional variability\, and searches for coherent pulsations and quasi-perio dic oscillations are used to investigate compact-object-sensitive timing s ignatures. Particular attention is given to high-frequency variability and possible thermal emission consistent with a neutron-star surface or bound ary layer. Together\, these independent spectral and timing diagnostics pr ovide a new test of the black hole and neutron star interpretations of IGR J17285−2922 and help refine the classification of this very faint X-ray binary.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6480/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6480/ END:VEVENT BEGIN:VEVENT SUMMARY:Studying of SuperFGD response using stopped cosmic muons DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6479@cern.ch DESCRIPTION:Speakers: Nataliya Skrobova ()\nThe SuperFGD (Super Fine-Grain ed Detector) is a part of the ND280 near\n detector complex for the T2K an d Hyper-Kamiokande experiments. The\n SuperFGD is a fully active and highl y granular scintillator neutrino\n detector. It consists of approximately 2 million scintillation cubes\,\n which allow for the reconstruction of pa rticles traveling in all\n directions. A good understanding of the SuperFG D response is crucial\n for detailed Monte Carlo simulations and systemati cs estimation for\n further physics analyses. This poster covers the selec tion of\n atmospheric muons stopped inside the sensitive volume of the det ector\,\n including their decays. Muons were selected by applying geometri cal\n constraints and searching for subsequent electrons or positrons. The \n reconstructed spectrum of the Michel e-/e+ is useful as another source\ n of energy scale determination. Reconstruction of Compton electrons\n fol lowing positron annihilation allows for the evaluation of the\n SuperFGD e ffective low energy threshold\n\nhttps://indico.particle.mephi.ru/event/62 6/contributions/6479/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6479/ END:VEVENT BEGIN:VEVENT SUMMARY:Quarkonium States in Strongly Magnetized Deconfined Matter of Comp act Astrophysical Objects DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6477@cern.ch DESCRIPTION:Speakers: Viacheslav Zelenev (NRNU MEPhI)\nThe possible format ion of deconfined quark matter in the cores of massive neutron stars and m agnetars provides an extreme environment for studying quarkonium in ultra- strong magnetic fields. In this work\, quarkonium states and their annihil ation through the q q̅ → 2γ channel in hot magnetized quark matter are investigated\, taking into account Landau-level quantization and the inte raction with the surrounding thermal quark-antiquark medium. The thermal q uark-antiquark pairs are assumed to be produced through the decay (timelik e splitting) of virtual gluons in the deconfined medium.\n\nAn analytical description of the annihilation width is developed\, with an extended form ulation including the full Landau-level structure\, screened interactions\ , and relativistic thermal averaging. In the lowest-Landau-level ultrarela tivistic limit\, the thermally averaged width scales as ∝ T⁴. In the light-quark limit\, the two-photon annihilation channel is related to the π⁰ → 2γ decay\, with a characteristic width of order 10 eV. Order-of -magnitude estimates give annihilation times of ~10⁶ years for light qua rks and ~1.5×10³ years for heavier quarks with m_q ≥ 100 MeV.\n\nThe l ight-quark timescale is comparable to the characteristic ~10⁶-year magne tic-field evolution timescale of a stable magnetar\, whereas heavy-quark s tates can annihilate much faster. This suggests that the q q̅ → 2γ cha nnel may play a more pronounced role in the thermalization of deconfined m atter for heavier quarks during the evolution of strongly magnetized compa ct astrophysical objects.\n\nhttps://indico.particle.mephi.ru/event/626/co ntributions/6477/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6477/ END:VEVENT BEGIN:VEVENT SUMMARY:Consensus based approach to modeling of interacting nuclear partic le system DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6478@cern.ch DESCRIPTION:Speakers: Yury Ivanskiy ()\nFor a system comprised of a large number of particles\, it is extremely difficult to specify their interacti ons analytically. The multi-agent approach provides a possibility to const ruct a numerical model of a system composed of many particles. Such many-p article system stabilizes over time\, and its final state is\, to a certai n degree\, independent of the initial conditions. The multi-agent approach is actively used in modern computer science and control theory for contro l of distributed\, decentralized networks.\n\nThis work employs an approac h based on the Vicsek model [1]\, which was proved analytically by Morse [ 2] and subsequently found numerous applications including load balancing [ 3]\, opinion dynamics [4]\, swarm control [5]. Its application to nuclear system modelling was proposed in [6]. In these applications\, the key feat ure is the agents' ability to coordinate without external influence. The c apacity of such coordination has been recently demonstrated for AI agents [7].\n\nThe implemented algorithm makes it possible to simulate the aggreg ation and evolution of proton-neutron system as well as the clustering of nuclear many-particle subsystems\, while accounting for long-range but rel atively weak Coulomb-type interactions. At the heart of the algorithm lies a consensus mechanism that balances the influence of the mutual attractio n and repulsion of particles and models the system's transition to a stabi lized state. The multi-agent nature of the proposed model allows evading t he problem of specifying a dynamical system that describes many-body inter actions. It scales efficiently and allows simulating a many-particle syste m with a large number of particles.\n\n1. T. Vicsek\, A. Czirók\, E. Ben- Jacob\, I. Cohen\, and O. Shochet (1995) Physical review letters\, 75(6)\, 1226.\n2. A. S. Morse\, A. Jadbabaie\, J. Lin (2003) IEEE Trans. Autom. C ontrol\, 48. p. 988.\n3. E. Borisoglebskaya\, V. Erofeeva\, O. Granichin\, Y. Ivanskiy\, and N. Kizhaeva\, (2023) Proc. 9th International Conference on Control\, Decision and Information Technologies\, pp. 2032-2036.\n4. N . E. Friedkin\, A. V. Proskurnikov\, R. Tempo\, and S. E. Parsegov (2016). Science\, 354(6310)\, \npp. 321-326.\n5. R. Olfati-Saber (2006) IEEE Tran s. Autom. Control\, 51(3)\, pp. 401-420. \n6. Y. Ivanskiy\, A. Unzhakova ( 2022) Bull. Russ. Acad. Sci.: Phys. 86 (9)\, 1108-1110. \n7. G. De Marzo\, C. Castellano\, and D. Garcia (2026) Science Advances\, 12: eaea6091.\n\n https://indico.particle.mephi.ru/event/626/contributions/6478/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6478/ END:VEVENT BEGIN:VEVENT SUMMARY:Construction of Nuclear Level Filling Schemes Using the Woods–Sa xon Potential Based on ENSDF Data DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6474@cern.ch DESCRIPTION:Speakers: Каролус Ле Магнус Рой Ндинга ()\, Irene ARKHANGELSKAJA (National Research Nuclear University MEPhI (Mo scow Engineering Physics Institute))\nModern nuclear databases such as NuD at 3 and ENSDF provide extensive experimental\ninformation on level energi es\, spins\, parities\, and decay modes. However\, these databases\nlack t ools for automated comparison with theoretical predictions and do not prov ide\ncomplete single-particle level schemes\, particularly for exotic nucl ei far from stability.\nIn this work\, we present a systematic study of nu clear level structures for isotopes\nwith Z = 10–72 using the realistic Woods–Saxon potential. The potential parameters are\ndetermined using th e Bohr–Mottelson systematics. The radial Schrödinger equation is\nsolve d numerically using the high-accuracy Numerov method.\nA software module f or NATI (Nuclide Analysis and Technical Interface) has been developed. The module automatically constructs single-particle level filling schemes and \nexports results in JSON\, CSV\, and SVG formats. It includes automated c omparison with\nexperimental data from ENSDF.\nThe methodology has been va lidated for three reference nuclei: 40Ca (Z = 20\, N = 20)\,\n56Fe (Z = 26 \, N = 30)\, and 116Sn (Z = 50\, N = 66). The calculated magic gaps of\n6. 4 MeV\, 7.6 MeV\, and 7.9 MeV are in good agreement with experiment. The a verage\ndeviation between theoretical and experimental single-particle ene rgies is 0.4–0.7 MeV.\nThe developed tool provides a data-ready approach for nuclear structure analysis and\ncan be applied for predictive filling of gaps in experimental data\, particularly for exotic\nnuclei with only 1–5 known levels.\nKeywords: Woods–Saxon potential\, nuclear shell mod el\, ENSDF\, Numerov method\,\nnuclear level schemes\n\nhttps://indico.par ticle.mephi.ru/event/626/contributions/6474/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6474/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Potential Astrophysical Sources of High-Energy Muon Eve nts in LVD DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6470@cern.ch DESCRIPTION:Speakers: Andrey Erkomov (National Research Nuclear University MEPhI)\nOne of the scientific goals of the LVD experiment is the search f or neutrinos. The study of neutrinos is important for understanding partic le physics and processes occurring in astrophysical objects. In this work\ , high-energy single-muon events are considered under the assumption that some upward-going events may be related to interactions of muon neutrinos. \nAn algorithm was developed to convert the direction of a muon registered in the local LVD coordinate system into coordinates in the ICRS system. T he algorithm then searches for possible astrophysical sources from the 4FG L-DR4 catalog within a selected angular distance. The 4FGL-DR4 is a catalo g of gamma-ray sources based on 14 years of Fermi-LAT observations of the whole sky. Objects from this catalog are considered as possible candidates for high-energy neutrino sources.\n\nhttps://indico.particle.mephi.ru/eve nt/626/contributions/6470/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6470/ END:VEVENT BEGIN:VEVENT SUMMARY:Monoscopic data processing and reconstruction with TAIGA-IACT DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6468@cern.ch DESCRIPTION:Speakers: Pavel Bezyazeekov (JINR)\nTAIGA (Tunka Advanced Inst rument for cosmic ray physics and Gamma Astronomy) is a hybrid air-shower observatory located in Eastern Siberia and designed to study high-energy g amma rays and cosmic rays. The TAIGA-IACT imaging atmospheric Cherenkov te lescopes operate at TeV energies\, where a key challenge in gamma-ray obse rvations is the suppression of the hadronic background\, which significant ly exceeds the gamma-ray flux.\nHere we present an overview of analysis pr ocedure used for TAIGA-IACT observations in monoscopic mode. The analysis chain is discussed\, including event reconstruction\, background estimatio n\, gamma-like event selection\, energy reconstruction\, and the derivati on of source energy spectra.\n\nhttps://indico.particle.mephi.ru/event/626 /contributions/6468/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6468/ END:VEVENT BEGIN:VEVENT SUMMARY:Automatic Tuning of Silicon Photomultiplier Parameters for a Scint illation Hodoscope Using Atmospheric Muons DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6467@cern.ch DESCRIPTION:Speakers: Ilya Sherstyanykh (IHEP)\nA method is proposed for t he automatic tuning of the operating parameters of silicon photomultiplier s (SiPMs) in the two-coordinate scintillation hodoscope of the SPASCHARM e xperiment using the atmospheric muon flux. The developed approach is inten ded to provide reproducible selection of discrimination thresholds and SiP M bias voltages\, as well as to monitor the stability of detector performa nce during the experiment.\n\nThe hodoscope under study is used in the SPA SCHARM experiment and consists of two mutually perpendicular planes\, each containing 32 scintillation elements\; light from each element is detecte d by an individual SiPM. Atmospheric muons are used as a natural source of penetrating charged particles\, enabling the detector to be tuned directl y in its operating geometry without the use of an external radioactive sou rce.\n\nThe readout electronics produces a binary indication of whether a preset discrimination threshold has been exceeded. The SiPM response is th erefore studied by sequentially scanning the threshold at different bias v oltages. The measured dependence of the counting rate R(T) on threshold T represents an integral threshold characteristic. To analyze the amplitude structure of the signal\, the differential characteristic -dR/dT is used\; it is related to the pulse-amplitude distribution and makes it possible t o identify the transition region from noise triggers to signals caused by traversing particles.\n\nEvent candidates are identified using spatially c onsistent hits in neighboring scintillators in both coordinate planes. The accidental-coincidence level is estimated by applying a time shift betwee n one plane and the other. The operating point is selected using a combina tion of observables: the single-count rate\, the coincidence rate of neigh boring elements\, the rate of muon-like events\, and the estimated acciden tal background.\n\nhttps://indico.particle.mephi.ru/event/626/contribution s/6467/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6467/ END:VEVENT BEGIN:VEVENT SUMMARY:Bayesian Superiority in On/Off analysis DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6469@cern.ch DESCRIPTION:Speakers: Petr Satunin (INR RAS)\nWe present a detailed compar ison of Bayesian criteria with three non-informative priors - flat\, Jeffr eys\, and scale-invariant - for testing a signal against an unknown backgr ound and compare them with the classical frequentist Li-Ma approach in the On/Off problem. We perform Monte Carlo simulations for various background levels and evaluate the Li-Ma and Bayesian criteria by their Type I error rates. We then simulate a nonzero signal and compare the criteria in term s of Type II error rates. We find that both the Li-Ma criterion and the Ba yesian criterion with the Jeffreys prior control Type I error well\, exclu ding the case of small background b\n\nhttps://indico.particle.mephi.ru/ev ent/626/contributions/6469/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6469/ END:VEVENT BEGIN:VEVENT SUMMARY:Quark-gluon string tension fluctuations and the effect on strange particle yields DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6466@cern.ch DESCRIPTION:Speakers: Andrey Puchkov (Saint Petersburg State University)\n In various microscopic string models (see\, e.g.\, [1–8])\, the Schwinge r mechanism [9\, 10]—which features a characteristic Gaussian exponentia l—is used to describe particle transverse-momentum spectra. On the other hand\, experimental data on inclusive hadron production spectra exhibit p ronounced thermal behavior. A. Bialas [11] proposed resolving this contrad iction by accounting for fluctuations in the string tension k\, modeled by a Gaussian distribution. However\, the probability distribution proposed in [11] peaked at k = 0\, which seems physically incorrect in the context of QCD confinement: a string possesses finite average energy density\, so the probability of zero tension should vanish. In the present work\, we mo dify the Bialas approach by assessing the local string tension fluctuation s around its mean value. We demonstrate that not only the mean value of th e string tension but also its fluctuations influence the strangeness produ ction\, and the treatment of these fluctuations allows for a better descri ption of strange particle yields.\n\nThe authors acknowledge Saint-Petersb urg State University for a research project ID: 153212394\n\n1. E. G. Ferr eiro and C. Pajares\, J. Phys. G 23\, 1961 (1997).\n2. N. Armesto\, D. A. Derkach\, G. A. Feofilov\, Phys. Atom. Nucl. 71\, 2087 (2008).\n3. E. O. B odnya\, V. N. Kovalenko\, A. M. Puchkov\, G. A. Feofilov\, AIP Conf. Proc. 1606\, 273 (2015).\n4. V. N. Kovalenko\, A. M. Puchkov\, G. A. Feofilov\, Bull. Russ. Acad. Sci. Phys. 80\, 8 (2016).\n5. V. Kovalenko\, G. Feofilo v\, A. Puchkov\, F. Valiev\, Universe 8\, 246 (2022).\n6. V. V. Vechernin\ , Phys. Part. Nucl. 54\, 528 (2023).\n7. V. Vechernin\, E. Andronov\, V. K ovalenko\, A. Puchkov\, Universe 10\, 56 (2024).\n8. E.V. Andronov \, A.M. Puchkov\, V.V. Vechernin\, V.N. Kovalenko\, Phys. Part. Nuclei 57\, 1153 –1157 (2026).\n9. J. Schwinger\, Phys. Rev. 82\, 664 (1951).\n10. T. D. Cohen and D. A. McGady\, Phys. Rev. D 78\, 036008 (2008)\; E. G. Gurvich\, Phys. Lett. B 87\, 386 (1979).\n11. A. Bialas\, Phys. Lett. B 466\, 301-3 04 (1999).\n\nhttps://indico.particle.mephi.ru/event/626/contributions/646 6/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6466/ END:VEVENT BEGIN:VEVENT SUMMARY:Pair gravitino production at the LHC DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6503@cern.ch DESCRIPTION:Speakers: София Франк-Каменецкая ()\nThe r eport presents the results of a study of the processes of paired gravitino production at the Large Hadron Collider (LHC). The observability of such processes under LHC conditions is assessed. In the model under study\, the gravitino is the LSP and is also considered a candidate for a dark matter particle.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/650 3/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6503/ END:VEVENT BEGIN:VEVENT SUMMARY:Full-scale HGND active layers: pre-production performance DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6502@cern.ch DESCRIPTION:Speakers: Aleksandr Makhnev (INR of RAS)\nThe High-Granularity Neutron Detector (HGND) is a new detector system in the BM@N experiment a t the Nuclotron (JINR\, Dubna)\, designed for the identification and measu rement of neutron energies produced in nucleus-nucleus collisions at energ ies up to 4 AGeV. This talk covers progress in pre-production verification and performance studies of the full-scale active layers of the detector\, as well as preparation for detector deployment. The presented data cover the timing resolution of the production version of the active layer measur ed with cosmic particles and an electron accelerator beam.\n\nhttps://indi co.particle.mephi.ru/event/626/contributions/6502/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6502/ END:VEVENT BEGIN:VEVENT SUMMARY:Constraints on IGM Neutral Fraction at z = 9.02-14.18 Using Ly-⍺ Measurements DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6475@cern.ch DESCRIPTION:Speakers: Qianli Lyu (University of Oxford)\nIn this work\, we focused on the conditions at the Cosmic Dawn\, before cosmic reionisation . We place new constraints on the fraction of the neutral hydrogen of the intergalactic medium at z = 9.02-14.18\, after analysing Lyman-alpha emiss ion (including upper limits) from 94 galaxy sources. Of these sources\, th ere were 91 3σ upper limits and 3 detections. This analysis was done usin g JWST data for both PRISM and grating measurements\, and incorporated bot h spectrometric and photometric measurements. New spectra from sources suc h as JADES Goods-North are included\, while one anomalous detection from J ADES Goods-South was excluded since it exhibited an abnormally high equiva lent width (EW). We updated the IGM neutral fraction (x_HI) to be 0.889 (+ 0.073 / -0.084). Furthermore\, from our model\, we found a significant dis tinction between xHI when variable ionised bubble size was considered vers us a fixed bubble size.\n\nhttps://indico.particle.mephi.ru/event/626/cont ributions/6475/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6475/ END:VEVENT BEGIN:VEVENT SUMMARY:Main properties of the scintillator for the SPD Beam-Beam Counter system DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6473@cern.ch DESCRIPTION:Speakers: Артём Золотаревский ()\nFor the pu rpose of local polarimetry at SPD\, the Beam-Beam Counter system is been d eveloping. The system is based on scintillator tiles of 10 mm thickness\, produced by Uniplast company. Relative light yield\, average decay time an d energy resolution of the scintillator sample coupled to a PMT are measur ed with gamma-ray source. In this report\, the results of the measurements are presented and discussed.\n\nhttps://indico.particle.mephi.ru/event/62 6/contributions/6473/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6473/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of neutron-induced secondary stars in the multiple dissoc iation of krypton nuclei at 950 MeV per nucleon DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6464@cern.ch DESCRIPTION:Speakers: Anton Markov (M. V. Lomonosov Moscow State Universit y)\nIn the dissociation of neutron-rich krypton\, neutron emission accompa nies the formation of charged fragments. Information on neutron multiplici ty and angular distributions complements the analysis of α-particle corre lations and helps characterize the composition and kinematics of the break up products. Estimating the sensitivity of nuclear emulsion to this neutro n component is therefore an important methodological step in the study of such fragmentation channels.\n\nSecondary interaction vertices (stars) wit hout an incoming charged-particle track provide an indirect probe of neutr ons produced in the multiple dissociation of krypton nuclei at 950 MeV per nucleon in nuclear emulsion. We examine the topological criteria for iden tifying candidate neutron-induced stars within the fragmentation cone defi ned by relativistic hydrogen and helium fragments\, and quantify the role of observation geometry using Geant4 simulations.\n\nNeutron and proton tr ansport at a kinetic energy of 950 MeV is simulated with the QBBC physics list in a homogeneous emulsion model. Two configurations are compared: tra nsverse passage through a 4 mm layer and emission from a fragmentation ver tex with an effective path length of 45 mm.\n\nThese estimates demonstrate the strong geometrical dependence of sensitivity to the neutron component . They provide a basis for interpreting the frequency of secondary stars s tatistically\, with the efficiency of identifying stars without an incomin g track requiring separate assessment.\n\nhttps://indico.particle.mephi.ru /event/626/contributions/6464/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6464/ END:VEVENT BEGIN:VEVENT SUMMARY:Experimental Characterization of a $^{124}$Xe$^{54+}$ Ion Beam Usi ng Nuclear Track Emulsion DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6463@cern.ch DESCRIPTION:Speakers: MARIMUTHU NATARAJAN (JINR)\nThis study presents an a nalysis of Nuclear Track Emulsion (NTE) exposed\nto an extracted $^{124}$X e$^{54+}$ beam at around 300 MeV per nucleon at the JINR\nNuclotron\, cond ucted within the framework of the BECQUEREL project[1].\nThe primary aim w as to characterize the beam profile and its uniformity\, and\nto determine the Bragg peak position\, in support of applied research in electronic co mponents and radiation biology. Three stacks\, each consisting of 8-10 nuc lear emulsion layers with a thickness of 60 µm deposited on a 2 mm thick\ nglass substrate were exposed transversely to the beam. This configuration enabled the recording of the ion trajectories and their energy deposition along\nthe penetration depth\, including the stopping region and the prod uction of long\nrange fragments. The area of each emulsion layer was digit ally imaged using an\nOlympus BX63 intelligent microscope[2]. Owing to the high ionization density\nof the incident $^{124}$Xe$^{54+}$ ions\, a 4X o bjective was sufficient for reliable track detection. A Gaussian Mixture M odel (GMM) applied to the measured grain area\ndistributions enabled the c lassification of tracks into three principal groups corresponding to light fragments\, intermediate mass fragments\, and heavy residues\,\nincluding the primary beam ions.\n\n\nReferences\n\n[1] P. I. Zarubin\, Lect. Notes Phys. 875\, 51-93 (2014) doi:10.1007/978-3-319-\n01077-9 3 [arXiv:1309.48 81].\n\n[2] J. Ronald Lawrence\, JINR START Project Report\,(2026). https: \n//start.jinr.ru/uploads/report_files/report_student_6639_\nproject_1144. pdf\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6463/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6463/ END:VEVENT BEGIN:VEVENT SUMMARY:Cosmic-Ray Muon Energy Spectra at Large Depths DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6472@cern.ch DESCRIPTION:Speakers: Владислав Гусев ()\nCosmic rays are fl uxes of charged particles coming from interstellar space. When primary cos mic-ray particles enter the Earth’s atmosphere\, they interact with its nuclei and produce secondary particles\, including muons. Due to their hig h penetrating ability\, muons can reach the Earth’s surface and even pro pagate to large depths underground. The energy spectrum of muons changes s ignificantly after they pass through a large amount of matter. There are d ifferent methods for calculating the energy spectrum of underground muons\ , for example\, Monte Carlo simulations. This method can provide high accu racy\, but it requires large computational resources. In this work\, an an alytical method for estimating the muon energy spectrum at large depths is considered for different values of parameters related to electron-positro n pair production\, bremsstrahlung\, photonuclear interactions\, and ioniz ation energy losses. The analytical muon energy spectrum was studied at di fferent depths\, and the influence of these parameters on the spectrum was estimated. Special attention was paid to the high-energy region\, with mu on energies of the order of TeV.\n\nhttps://indico.particle.mephi.ru/event /626/contributions/6472/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6472/ END:VEVENT BEGIN:VEVENT SUMMARY:A TAIGA-IACT Search for Submicrosecond Optical Transients DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6471@cern.ch DESCRIPTION:Speakers: Alexandra T. Panferova (SINP MSU)\nSearches for subm icrosecond and nanosecond optical transients are motivated by studies of r apid astrophysical processes and the search for extraterrestrial intellige nce (SETI). Imaging atmospheric Cherenkov telescopes can be used to search for such transients during regular observations. Coincident signals from multiple telescopes\, combined with image analysis\, help identify candida te events and suppress the extensive air shower background. In this work\, the event selection criteria are described\, and preliminary results from an analysis of TAIGA-IACT data from 2022–2025 are reported. Prospects f or further development of the search method are also discussed.\n\nhttps:/ /indico.particle.mephi.ru/event/626/contributions/6471/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6471/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the dependence of the ${}^{238}$U(n\,f) reaction cross-se ction on neutron energy DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6462@cern.ch DESCRIPTION:Speakers: Artem Nesynov ()\nThe ${}^{238}$U(n\,f) reaction pla ys an important role in modern nuclear energy\, so to date many measuremen ts of the cross-section of this process as a function of incident neutron energy have been performed. In most works\, the energy interval below 20 M eV\, which is most relevant for modern reactor technologies\, has been stu died. At the same time\, the 20–200 MeV region\, which will be in demand in future technologies\, has been studied somewhat less – see\, for exa mple\, [1]. In particular\, if the uncertainty of the evaluated ${}^{238}$ U(n\,f) cross-section in the 1–20 MeV region does not exceed 1.5%\, then in the 30–50 MeV interval this uncertainty increases to 2–2.5%\, and above 100 MeV it exceeds 4% [2].\n\nIt is important\, however\, to underst and that experimental data on fission cross-sections can be obtained only for relatively stable isotopes of heavy elements irradiated by neutrons. B ut in nuclear facilities\, short-lived isotopes\, which also fission under neutron action\, are produced in reactions of the type (n\,2n) or (n\,p). The fission cross-sections of such isotopes cannot be measured\, but they can be estimated using model approaches. At the same time\, a method base d on such approaches can be developed only by calculating the fission cros s-sections of relatively stable isotopes\, such as ${}^{238}$U\, and compa ring the results with measured cross sections.\n\nIn this work\, the energ y dependence of the ${}^{238}$U(n\,f) fission cross-section induced by neu trons in the range from 0.1 to 50 MeV has been modeled using the TALYS-2.2 code [3]. At the first stage\, the results of calculations performed with default parameters (which\, as a rule\, are parameters from the RIPL-3 li brary [4]) were compared with experimental data from the EXFOR library [5] . Discrepancies between the calculated and measured cross-sections were re vealed in a number of energy intervals. At the next stage\, possibilities for minimizing the discrepancies were studied by adjusting the fission bar rier parameters\, using alternative approaches for calculating the level d ensity of excited states\, as well as for modeling pre-equilibrium process es. As a result\, fission barrier and collective enhancement parameters fo r the nuclei ${}^{239-232}$U were determined\, allowing the main features of the measured energy dependence of the ${}^{238}$U(n\,f) cross-section t o be reproduced. A high sensitivity of the cross-section to the parameters of rotational enhancement of the level density and to the shape of the nu cleus at the fission barriers has also been established.\n\nhttps://indico .particle.mephi.ru/event/626/contributions/6462/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6462/ END:VEVENT BEGIN:VEVENT SUMMARY:Primordial Nucleosynthesis in Hierarchical Antimatter Domains DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6460@cern.ch DESCRIPTION:Speakers: Anna Dembitskaia (National Research Nuclear Universi ty MEPhI\, Moscow\, Russia)\nIn a baryon-asymmetric Universe\, primordial antimatter domains arise from inhomogeneous baryogenesis driven by the Pse udo-Nambu-Goldstone Boson field during inflation. Their evolution is gover ned by the competition between Hubble expansion and microphysical erosion of the domain boundary via annihilation with surrounding matter.\nThe doma in\, however\, is not homogeneous. Stochastic dynamics of the phase during inflation causes repeated recrossings of the potential barrier\, producin g a self-similar nested hierarchy: antimatter domains containing baryonic inclusions\, which themselves contain antibaryonic inclusions\, and so on down to the horizon scale at the end of inflation. \nThe key consequence f or nucleosynthesis is that annihilation proceeds throughout the volume\, n ot on a single outer boundary. At t =100 s\, free neutrons diffuse to the internal interfaces and annihilate there\, suppressing primordial helium-4 . High-energy photons from pion decay photodissociate helium-4 nuclei\, si gnificantly raising the helium-3 to helium-4 ratio\, while non-thermal rea ctions overproduce lithium-6. This provides a unique chemical signature fo r antimatter astrophysical objects such as anti-stars or globular clusters . On the other side nonhomogeneity of antimatter domain facilitates format ion of antimatter objects of stellar mass\, which can be source of antihel ium-4 in cosmic rays.\nCurrent models predict an anti-helium flux within r each of the AMS-02 experiment. Consistency with cosmic microwave backgroun d and diffuse gamma-ray observations sets a strict upper limit on the frac tion of annihilated antimatter\, imposing strong constraints on models of inhomogeneous baryogenesis.\n\nhttps://indico.particle.mephi.ru/event/626/ contributions/6460/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6460/ END:VEVENT BEGIN:VEVENT SUMMARY:Modernization of the M31 Spectrometric Magnet Temperature Control System for the SPASCHARM Experiment at U-70 DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6461@cern.ch DESCRIPTION:Speakers: Mikhail Gani (MEPhI\, IHEP)\nA modernization of the temperature control system for the M31 spectrometric magnet of the SPASCHA RM experiment at the U-70 accelerator is presented. The transition to a mu ltitasking architecture based on FreeRTOS\, together with the use of EPICS \, is aimed at improving the modularity\, versatility\, and scalability of the slow control system. The new architecture enables independent executi on of measurement and communication functions and facilitates the addition of further measurement channels. As part of the system upgrade\, a second branch of temperature sensors was implemented\, doubling the number of mo nitored channels and providing complete temperature monitoring of the magn et windings.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6 461/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6461/ END:VEVENT BEGIN:VEVENT SUMMARY:Resonant energy exchange in kink-antikink collisions in $\\phi^8$\ , $\\phi^{10}$ and $\\phi^{12}$ field theories DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6459@cern.ch DESCRIPTION:Speakers: Vakhid Gani (NRNU MEPhI)\, Andrey Nikiforov (NRNU ME PhI)\nWe investigate resonance phenomena in kink-antikink collisions in\n( 1+1)-dimensional scalar field theories with higher-order polynomial\npoten tials. Particular attention is paid to the mechanism of energy\nexchange b etween the translational motion of the kinks and vibrational\nmodes of the kink-antikink system.\n\nNumerical simulations reveal a nontrivial depend ence of the collision\noutcome on the initial velocity of the kink and ant ikink. In addition\nto kink–antikink capture and one-bounce escape\, nar row multi-bounce\nresonance windows are observed. Within these windows\, p art of the\nkinetic energy of the kinks is transferred during the first co llision\ninto vibrational excitations of the kink-antikink system and can\ nsubsequently be transferred back into translational motion. This\nallows the kink and antikink to escape after two or more collisions\nfor initial velocities below the critical velocity.\n\nThe structure of the resonance windows\, the critical velocities\, and\nthe spectral properties of kink-a ntikink configurations are analyzed.\nThe numerical results support the re sonant energy exchange mechanism\nas an explanation for the formation of t he observed resonance windows.\nIn particular\, the resonance structure ca n be interpreted in terms of\nenergy exchange between the translational mo tion of the kinks and\ncollective vibrational modes of the kink-antikink p air.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6459/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6459/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutron-induced fission of 232-Th: calculation of the reaction cro ss-section DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6458@cern.ch DESCRIPTION:Speakers: Aleksey Grigorev ()\nNeutron-induced fission of 232- Th: calculation of the reaction cross-section\n\n\nA.K. Grigoriev\n\nNatio nal Research Nuclear University MEPhI\, Moscow\, Russia\n\nThis work inves tigates the feasibility of reproducing the dependence of the ²³²Th fiss ion cross-section on incident neutron energy in the 0.1-40 MeV range using the TALYS-2.2 code [1]. This study represents the first stage of a projec t aimed at describing the differential fission cross-section - or\, equiva lently\, the angular distribution of fission fragments - defined as the ra tio of the differential cross-section to the total cross-section (integrat ed over all fragment emission\nangles). While the fission cross-section is primarily determined by the shape of the fission barrier and the nuclear level density at the barrier\, the angular distribution depends on the dis tribution of these states with respect to the projection K of the nuclear spin onto the axis of elongation of the fissioning nucleus (see\, e.g.\, [ 2]) - a characteristic to which the fission cross-section itself is insens itive. Insights into the distribution of the quantum number K derived from experimental data could accelerate the development of modern approaches t o modeling the dynamics of fissioning nuclei with non-zero spin.\n\nThe ² ³²Th nucleus is one of the few for which experimental data exist regardi ng the energy dependence of not only the neutron-induced fission cross-sec tion (see\, e.g.\, [3]) but also the angular anisotropy of fission fragmen ts [4\, 5]. Additional interest in the ²³²Th nucleus stems from experim ental evidence indicating the existence of a third hump in the fission bar rier of the compound nucleus ²³³Th. However\, it has been found that ca lculations performed using the TALYS-2.2 code with default parameters yiel d an overestimated fission cross-section.\n\nTo refine the description\, t he heights and widths of the fission barriers were varied for the compound nucleus ²³³Th and for thorium isotopes with mass numbers 232-228\, who se fission contributes to the observed total fission cross-section via the (n\,1nf)-(n\,5nf) channels. The sensitivity of the fission cross-section to the excited-level density and the shape of the fissioning nuclei at the barriers was also investigated. A triple-humped barrier model for ²³³T h provides a smooth overall description of the energy dependence of the fi ssion cross-section\; however\, a double-humped barrier parameterization y ields similar results\, leaving the question of the necessity of a third h ump unresolved. The resulting parameter values ​​can serve as a basis for the next stage of the work: calculating the differential cross-section for the ²³²Th(n\,f) reaction.\n\n1. A.J. Koning\, S. Hilaire\, S. Gori ely. EPJA\, v. 59\, p. 131 (2023).\n2. R. Vandenbosch\, J.R. Huizenga. Nuc lear Fission. - New York\, Academic Press\, Inc.\, 1973.\n3. O.A. Shcherba kov et al. JNST\, v. 39\, suppl. 2\, p. 230 (2002).\n4. I.V. Ryzhov et al. Nucl. Phys. A\, v. 760\, p. 19 (2005).\n5. Vorobyev A.S. et al. JETP Lett ers\, v. 102\, p. 203 (2015).\n\nhttps://indico.particle.mephi.ru/event/62 6/contributions/6458/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6458/ END:VEVENT BEGIN:VEVENT SUMMARY:Data Acquisition System of the Water Cherenkov Detector Prototype for the TAIGA-100 Pilot Project DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6456@cern.ch DESCRIPTION:Speakers: Mikhail Shulga (Joint Institute for Nuclear Research (JINR)\, Dubna\, Russia)\nTAIGA-100 is a project of a large-scale astroph ysical complex designed to solve a wide range of fundamental problems in g amma astronomy in the energy range from 300 GeV to above 1 PeV\, cosmic ra y (CR) physics from 100 TeV to 10 EeV\, particle astrophysics\, neutrino p hysics\, and interdisciplinary research. The complex will include several types of detectors for registering different components of extensive air s howers (EAS) over an area of 100 km^2. The basic elements of the project w ill be wide-angle atmospheric Cherenkov stations with a field of view of ~ 2 sr and water Cherenkov detectors (WCD) with an area of ~40 m^2\, supplem ented by scintillation counters and radio antennas. Atmospheric Cherenkov telescopes are also planned to be placed in the central part of the new in stallation\, and fluorescence detectors on its periphery.\n\nThe construct ion of the TAIGA-100 complex is planned to be carried out in stages. At pr esent\, work is proceeding in three key directions. First\, computer simul ations are being performed to determine the optimal configuration of the i nstallation and its potential\, as well as to develop methods for reconstr ucting EAS parameters and primary radiation. Second\, a site is being soug ht for the TAIGA-100 complex. Third\, detector systems are being developed . Within the latter direction\, the construction of a pilot installation w ith an area of 0.5 km^2 is also planned\, using the infrastructure and ope rational experience of the existing TAIGA-1 gamma observatory. As a first step\, in autumn 2025 an experimental station based on a WCD prototype wit h an area of ~7 m^2 was created and put into data taking. At the next stag e\, two full-scale water detectors are expected to be deployed during autu mn 2026. In addition\, the development and implementation of an innovative system for the extraction and transmission of trigger signals is planned. \n\nThe report presents a description and results of test measurements of the analog signal readout channel for the WCD over a wide dynamic range\, the data acquisition system\, and the system for generating and transmitti ng trigger signals.\n\nhttps://indico.particle.mephi.ru/event/626/contribu tions/6456/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6456/ END:VEVENT BEGIN:VEVENT SUMMARY:Energy and Timing Resolution of the Russian-Made Topaz-M MCP-PMT f or Particle Physics Applications DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6465@cern.ch DESCRIPTION:Speakers: Filipp Dubinin (Lebedev Physical Institute of the Ru ssian Academy of Sciences\, National Research Center "Kurchatov Institute" \, National Research Nuclear University MEPhI)\nThe energy and timing reso lution of the Russian-made Topaz-M microchannel-plate photomultiplier tube (MCP-PMT)\, developed and manufactured by Baspik\, were experimentally st udied. The coincidence time resolution of the Topaz-M MCP-PMT was measured for the first time\, while its energy resolution was studied with LaBr₃ :Ce and GAGG scintillators using gamma-ray sources in the 511-1275 keV ene rgy range and compared with conventional photomultiplier tubes\, assessing its potential for fast-timing and gamma-ray spectrometry applications in particle physics experiments.\n\nhttps://indico.particle.mephi.ru/event/62 6/contributions/6465/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6465/ END:VEVENT BEGIN:VEVENT SUMMARY:Improvement of reconstruction and background suppression for track events in baikal-gvd based on zenith angle estimation from individual str ings DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6454@cern.ch DESCRIPTION:Speakers: Aleksey Kulikov ()\nBaikal-GVD is a gigaton-scale ne utrino telescope deployed at a depth of about 1 km in the waters of Lake B aikal. The detector registers Cherenkov radiation using vertical strings o f optical modules. Each string comprises 36 modules with a 15 m spacing\, providing an instrumented length of 525 m\, and a group of 8–9 such stri ngs forms an independent cluster.\n\nSince standard track reconstruction m ethods require hits in at least two strings\, a significant fraction of th e data remains unused. This work is devoted to the development of an algor ithm for reconstructing the muon zenith angle based on information from a single string. The goal is to extend the existing track dataset with nearl y vertical events and to employ independent zenith angle estimation for th e suppression of atmospheric muon background.\n\nThe performance of the al gorithm has been tested on simulated samples of neutrinos and atmospheric muons. It is shown that for upgoing near-vertical (with zenith angle 170° -180°) neutrinos\, the median accuracy of zenith angle reconstruction rea ches 1° (depending on the zenith angle and the number of hit modules).\n\ nhttps://indico.particle.mephi.ru/event/626/contributions/6454/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6454/ END:VEVENT BEGIN:VEVENT SUMMARY:Evolution of Anomalous Chemical Composition in Primordial High-Tem perature Regions Confined Within Domain Walls DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6453@cern.ch DESCRIPTION:Speakers: Lazaro Arturo Ychaso Perez (MEPhI)\nThis study inves tigates thermonuclear nucleosynthesis within hypothetical hot primordial r egions of the early Universe\, which are separated from the Hubble expansi on and confined within domain walls. We present a numerical model simulati ng the evolution of nuclide concentrations at constant extreme temperature s exceeding 5 MeV. Under these conditions\, the confinement of neutrinos m akes weak interaction reactions reversible\, leading to rapid local thermo dynamic equilibrium and stabilizing both the temperature and the proton-to -neutron ratio. Our results demonstrate the formation of a unique\, anomal ous hydrogenless chemical composition\, as practically all free nucleons e fficiently bind into helium-4 (${}^4$He). Subsequently\, the saturation of the plasma with helium-4 triggers an intense\, explosive synthesis of car bon-12 (${}^{12}$C) via the triple-alpha process. Unlike standard stellar nucleosynthesis\, this high-energy process is not solely dominated by the Hoyle resonance and is instead accurately described by the generalized Cau ghlan-Fowler formula\, which accounts for highly excited states of the car bon nucleus. Finally\, the strict conservation of the total baryon number throughout the calculations verifies the physical accuracy and stability o f the applied numerical methodology.\n\nhttps://indico.particle.mephi.ru/e vent/626/contributions/6453/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6453/ END:VEVENT BEGIN:VEVENT SUMMARY:A gas of null strings in the early and late Universe: from local d ynamics to accelerated expansion DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6452@cern.ch DESCRIPTION:Speakers: Марина Хуторная (Студент)\nMode rn analysis of data from early- and late-epoch cosmological probes has rev ealed statistically significant tensions between predictions for different stages of the Universe's evolution. Key among them are the discrepancies in the determination of the Hubble constant $H_{0}$ and the parameter $S_{ 8}$\, which characterizes the amplitude of matter density fluctuations. On e of the most promising ways to resolve these contradictions is the concep t of dynamical dark energy\, moderate observational indications of whose e xistence are contained in the recent DESI BAO DR2 data release. The gas of thin tubes of a massless scalar field also belongs to the class of dynami cal dark energy models\, since the parameter $w$ of its equation of state is a dynamical function of the density. In this work\, we investigated the influence of the evolution of the gravitational field of a single closed thin tube of a massless scalar field\, radially changing its size\, on the trajectories of a test null string. We also investigated how constraints on the trajectories of test objects can macroscopically influence the dyna mics of the accelerated expansion of the entire gas of thin tubes on cosmo logical scales.\n\nhttps://indico.particle.mephi.ru/event/626/contribution s/6452/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6452/ END:VEVENT BEGIN:VEVENT SUMMARY:String mechanism for mass generation in a gas of thin tubes of a m assless scalar field DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6451@cern.ch DESCRIPTION:Speakers: Мария Демиденко ()\nThe gas of thin tu bes of a massless scalar field (TToMSF) could have been formed at the earl iest stages of the evolution of the Universe and\, as a result\, could hav e influenced all processes in its evolution. The feature of TToMSF gas is that the parameter of the equation of state of such a gas depends on the d ensity of the gas. As a result\, local equations of state can be realized in TToMSF gas\; this may alleviate tensions within the standard cosmologic al model associated with the inhomogeneity of structure growth in the Univ erse and the significantly higher inhomogeneity of the observed Universe. At the same time\, the gravitational interaction between individual TToMSF s in the gas can lead to the generation of particles with an effective non -zero rest mass\, which\, taken together\, allows us to classify the TToMS F gas not only as a dynamical dark energy model\, but also as a unified da rk fluid model. In this work\, we investigated possible trajectories of a test null string in the gravitational field of an ``early’’ thin close d tube of a massless scalar field that radially increases or decreases its size. We have shown that the test null string experiences a ``strong'' gr avitational attraction at each segment of its trajectory\, which is capabl e of changing the nature of the motion of the test null string to the oppo site. This feature of interaction may indicate the possibility of realizin g a scenario of long-term self-consistent motion of two closed TToMSFs wit hin a spatially limited region. At the same time\, such gravitating system s can be interpreted as particles with an effective non-zero rest mass.\n\ nhttps://indico.particle.mephi.ru/event/626/contributions/6451/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6451/ END:VEVENT BEGIN:VEVENT SUMMARY:Combinatorial method of nuclear level density calculation within F olded Yukawa Potential with metastable states and its effect on reaction c ross sections DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6494@cern.ch DESCRIPTION:Speakers: Leonid Trofimov ()\nNuclear self-consistent mean fie ld result in appearance of series of single-particle states [1\, 2]\, whic h can be obtained within Folded Yukawa Potential [3\, 4]. Combinatorial me thod is developed to calculate level density $\\rho$. In this approach\, i t's possible to also get metastable states\, leading to altering level den sity and effecting nuclear cross sections of\, in particular\, astrophysic al purpose [6]\, which were calculated in TALYS software package [5] with the implementation of obtained level density.\n\n1. Bohr A.\, Mottelson B. Nuclear Structure. Single-particle motion. — W. A. Benjamin\,1969. — 1219 p.\n2. Ring P.\, Shuck P. The Nuclear Many-Body Problem. — Springer -Varlag. 1980.\n3. Uhrenholt H.\, Aberg S.\, Moller P. et. al. Combinatori al nuclear level-density model //\nNuclear Physics A. 2013. V. 913. P. 127 .\n4. Nix J. R. Calculation of fission barriers for heavy and superheavy n uclei // Annual\nReview of Nuclear Science. 1972. V. 22(1). P. 65-120.\n5. Koning A.\, Hilaire S.\, Goriely S. TALYS-1.9. A nuclear reaction program . User Manual.\n— 2017.\n6. Murphy R. J.\, Kozlovsky B.\, Kiener J.\, Sh are G. H. Nuclear gamma-ray de-excitation lines and\ncontinuum from accele rated-particle interactions in solar flares // The American Astronomical\n Society. 2009. V. 183(1). P. 142.\n\nhttps://indico.particle.mephi.ru/even t/626/contributions/6494/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6494/ END:VEVENT BEGIN:VEVENT SUMMARY:Inflationary scalar field dynamics and the mass spectrum of primor dial black holes DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6457@cern.ch DESCRIPTION:Speakers: Динмухаммед Жамбыл ()\nOne of the k nown mechanism for primordial black holes formation is based on the collap se of closed domain walls in the early Universe. The domain walls arise fr om multiple scalar field fluctuations during the inflationary stage. Two a pproaches exist for describing this process: the massless field and the ma ssive field approximation. This paper explores both approximations. The ma ss spectra of the forming primordial black holes are derived and compared for both cases. In addition\, the conditions of applicability for each app roach are discussed.\n\nhttps://indico.particle.mephi.ru/event/626/contrib utions/6457/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6457/ END:VEVENT BEGIN:VEVENT SUMMARY:INVESTIGATION OF SECONDARY ELECTRON EMISSION PROCESSES USING A MUL TI-WIRE MONITORING SYSTEM FOR CHARGED-PARTICLE AND HEAVY-ION BEAMS DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6449@cern.ch DESCRIPTION:Speakers: Egor Zemlin (Saint Petersburg State University)\nSec ondary electron emission is the process of electron emission from the surf ace of a material (target) under bombardment by beams of charged particles and heavy ions. The study of this process is challenging due to the need for accurate measurements of both the incident beam current and the total current of secondary electrons emitted from the target. Secondary electron emission is a surface process\, with a secondary-particle escape depth of approximately 5 nm [1]. Therefore\, refractory materials coated with a th in layer of the material under investigation are commonly used as targets. A representative example is a gold-coated tungsten wire\, which serves as a sensor. An array of such sensors forms a wire-grid beam profile monitor [2]. The use of this type of detector for monitoring the spatial distribu tion of charged particles or heavy ions extracted from an accelerator make s it possible to determine the beam profile\, i.e.\, the transverse distri bution of beam density. Beam particles interact with the sensors and eject secondary electrons from their surfaces. As a result\, each sensor acts a s a current source. The ratio of the total beam current to the total secon dary electron current is referred to as the secondary electron emission co efficient.\nIn this work\, a multi-wire beam monitoring system for charged particles and heavy ions\, developed at Saint Petersburg State University (SPbU) [2]\, was used as the experimental setup. An important feature of this system is the use of sensor electrodes made of different materials an d alloys. This makes it possible to determine the secondary electron emiss ion coefficients of various materials and alloys interacting with beams of both light charged particles and heavy ions over a wide energy range.\nEx perimental data on secondary electron emission coefficients were obtained at the Unique Scientific Facility (USF) “A.F. Ioffe Institute of Physics and Technology U-120 Cyclotron” using 3 MeV proton beams and 53 MeV ^40 Ar^8+ ion beams. During the experiments\, the profiles of both beams were visualized\, and the parameters of the signals generated by the sensors up on interaction with the beam particles were investigated. Processing of th e experimental data allowed\, for the first time\, the determination of th e secondary electron emission coefficients of the sensor material (gold-co ated tungsten) under irradiation by proton and argon-ion beams in the inve stigated energy range. These results provide a basis for validating theore tical descriptions of secondary electron emission processes induced by int eractions of low- and intermediate-energy charged particles and heavy ions with matter.\n\nThis work was supported by St. Petersburg State Universit y (project ID: 153212394).\n \nREFERENCES\n\n1. Bronshtein I. M.\, Fraim an B. S. Secondary Electron Emission. — Moscow: Nauka\, 1969. 408 p.\n2. Zherebchevsky V. I.\, Zemlin E. O.\, Maltsev N. A. Multisensor system for monitoring charged particle and heavy ion beams. RF Patent No. 2830097\, Cl. G01T 1/34 (2024.08).\n\nhttps://indico.particle.mephi.ru/event/626/con tributions/6449/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6449/ END:VEVENT BEGIN:VEVENT SUMMARY:Renormalization group analysis of randomly growing surface with ac tive feedback on incompressible fluid DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6448@cern.ch DESCRIPTION:Speakers: Egor Parkhomenko ()\nStochastic dynamics of a scalar field evolving according to the nonlinear Kardar–Parisi–Zhang (KPZ) \ nequation and interacting with a randomly moving incompressible fluid is i nvestigated. \nThe fluid dynamics is described by the stochastic Navier– Stokes equation with an external random force. \nIn a difference with prev ious studies\, an active feedback reaction of the growing surface profile \non the fluid velocity field is included. The analysis is performed withi n the field-theoretic approach \nand Renormalization Group (RG) framework. Renormalization constants\, $\\beta$-functions\, and anomalous \ndimensio ns are calculated in the one-loop approximation using dimensional regulari zation and Minimal \nSubtraction (MS) scheme. Fixed points of the RG equat ions are found\, and their infrared (IR) stability \nis examined via eigen values of the stability matrix. The main physical result is that at the on ly \nIR-attractive fixed point\, the coupling constant corresponding to th e active feedback of the scalar field \non the fluid vanishes. This means that at macroscopic spatial and temporal scales\, turbulent mixing \ndomin ates and suppresses the hydrodynamic response induced by the growing surfa ce.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6448/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6448/ END:VEVENT BEGIN:VEVENT SUMMARY:FPGA-BASED MUON REGISTRATION CHANNEL FOR POSITIONING SYSTEM DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6447@cern.ch DESCRIPTION:Speakers: Maksim Lapshin ([1] (http://government.ru/docs/all/1 05187/))\nFPGA-BASED MUON REGISTRATION CHANNEL FOR POSITIONING SYSTEM\n\nM . A. Lapshin¹\, A. V. Kantsyrev¹\, A. A. Golubev¹\, A.V. Bognadov¹\n\n 1NRC «Kurchatov Institute»\, Russia\nE-mail: lapshin.mm.aa@gmail.com\n\n Cosmic-ray muons are a natural source of penetrating particles that can be used for positioning and navigation in underground environments where con ventional positioning systems have limited applicability [1\, 2]. Muon-bas ed positioning methods can use the temporal correlation of muon detection events recorded by surface and underground detectors to estimate the relat ive position of the underground detector.\nThis work presents the developm ent of an FPGA-based muon registration channel intended for a positioning system of a borehole muon cylindrical detector [3] of muon tomography syst em for undeground geological object investigation or for in build position ing systems. The proposed channel is a compact reference detector located at the surface above the borehole or installed above the second muon dete ctor for in-building systems. Its main purpose is to register the passage of a muon and generate an event timestamp in the same time reference syste m as the borehole detector\, without the need for muon track reconstructio n. The reference detector is planned to be based on a plastic scintillator and a silicon photomultiplier (SiPM)\, while the signal processing is per formed using an FPGA (Xilinx Artix 7) operating at a frequency of 100 MHz. The surface muon registration channel and underground muon detector (of s econd flat muon detector) are planned to be synchronized using synchro pul se sended via suspension cable for a borehole muon detector. The resulting timestamps can be used to identify correlated muon detection events recor ded by both detectors and determine the time difference between their dete ction. In the future\, this technology can be used to estimate the angular azimutal position of the borehole detector.\nThe proposed approach does n ot require reconstruction of individual muon tracks in the reference detec tor and therefore allows a relatively simple detector configuration to be used. The developed system is considered as a basis for further experiment al studies of the possibility of positioning borehole instruments and unde rground navigation using cosmic-ray muons.\n\nReferences\n1. Tanaka H. K. M. Muometric positioning system (μPS) with cosmic muons as a new underwat er and underground positioning technique //Scientific Reports. – 2020. – Т. 10. – №. 1. – С. 18896.\n2. Tanaka H. K. M. Wireless muomet ric navigation system //Scientific Reports. – 2022. – Т. 12. – №. 1. – С. 10114.\n3. Golubev A. A. et al. Borehole muon tomograph for se arch and evaluation of ore deposits //Review of Scientific Instruments. – 2025. – Т. 96. – №. 11.\n\nhttps://indico.particle.mephi.ru/eve nt/626/contributions/6447/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6447/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino oscillations and decoherence in astrophysical environment s DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6481@cern.ch DESCRIPTION:Speakers: Artem Popov (Moscow State University)\nA number of c urrent and future neutrino experiments are devoted to the detection of ast rophysical neutrinos. Neutrino interactions with dense matter and strong m agnetic fields peculiar to astrophysical environments\, such as supernova explosions\, are expected to cause considerable effects in the neutrino fl avour evolution. One of the interesting effects is damping of the neutrino oscillations due to the neutrino wave packets separation. We develop the wave packet description of neutrino oscillations in astrophysical environm ents. It is shown that the damping of neutrino helicity transitions caused by their interactions with a magnetic field can occur during supernova ex plosions. We emphasize the difference between Dirac and Majorana neutrinos . CP-violating effects are also considered.\n\nBased on:\n[1] A.Popov\, A. Studenikin\, “High-energy neutrinos flavor composition as a probe of neu trino magnetic moments”\, Phys.Rev.D 111 (2025) 12\, 123001.\n[2] A.Popo v\, A.Studenikin\, A.Tcvirov\, "Wave packet description of Majorana neutri no oscillations in a magnetic field"\, arXiv:2602.02804.\n[3] A.Popov\, A. Studenikin\, “Manifestations of nonzero Majorana CP-violating phases in oscillations of supernova neutrinos”\, Phys.Rev.D 103 (2021) 11\, 115027 .\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6481/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6481/ END:VEVENT BEGIN:VEVENT SUMMARY:Study on transverse Momentum Resolution of SPD Straw Tracker in hi gh multiplicity ion-ion collisions DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6450@cern.ch DESCRIPTION:Speakers: Arina Lazareva ()\nThe performance of the Straw Trac ker (ST) is one of the key factors determining the momentum resolution of the Spin Physics Detector (SPD) at the NICA collider. The quality of charg ed-particle track reconstruction depends not only on the detector geometry and event multiplicity but also on the parameters of the track-finding an d track-fitting algorithms.\n\nThis work focuses on track reconstruction i n the SPD ST and its impact on the relative transverse momentum resolution for different charged-track multiplicities. Monte Carlo simulations are u sed to reconstruct charged-particle trajectories in various light-to-moder ate ion-ion collisions. Reconstructed tracks are matched to Monte Carlo “true tracks” via the fraction of common detector hits\, which allows one to correctly account for mixed and incorrectly reconstructed track can didates. The transverse momentum resolution is studied using the relative residual\, evaluated in different transverse-momentum intervals for differ ent colliding ion species. Wrong hit associations with tracks at high mult iplicities result in notable tails in the relative resolution. The choice of an appropriate fit function is also discussed.\n\nhttps://indico.partic le.mephi.ru/event/626/contributions/6450/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6450/ END:VEVENT BEGIN:VEVENT SUMMARY:Matter effects in long-baseline neutrino experiments DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6446@cern.ch DESCRIPTION:Speakers: Elena Semenova (nstitute for Nuclear Research of the Russian Academy of Sciences\, MEPHI)\nThe search for CP violation in the lepton sector is one of the central goals of modern neutrino physics\, mot ivated by the need to explain the matter–antimatter asymmetry of the Uni verse. In long-baseline accelerator experiments\, the interpretation of ne utrino and antineutrino appearance signals is complicated by matter effect s: coherent forward scattering in the Earth can mimic or modify genuine CP violation. We study these effects in the T2K and NOvA experiments within the standard three-flavour oscillation picture\, comparing the vacuum case with realistic matter potentials.\nUsing CP-odd ellipses as a visualisati on tool\, we scan the unknown CP phase over its full range and plot the co rresponding neutrino and antineutrino probabilities. The ellipses are cons tructed for different values of the atmospheric mixing angle\, including m aximal mixing and both octants\, and for several matter densities.\nThe pa rametric degeneracy between the CP phase and the octant of the atmospheric mixing angle remains a fundamental challenge. T2K provides a cleaner meas urement of CP violation because its matter effect is small\, whereas NOvA is more sensitive to the mass hierarchy because its matter effect is large . This complementarity makes a joint analysis essential for separating int rinsic CP violation from matter-induced asymmetries.\nThe next generation of long-baseline experiments\, especially DUNE\, will address these challe nges directly. With a 1300-kilometre baseline\, higher neutrino energies a nd a large liquid-argon detector\, DUNE will experience strong matter effe cts and will be able to determine the mass hierarchy and search for CP vio lation with high sensitivity. Extending the CP-odd ellipse approach to DUN E will help optimise the separation of genuine CP violation from matter ef fects and clarify the role of the octant degeneracy. Together with Hyper-K amiokande\, DUNE is expected to provide a decisive test of CP violation in the lepton sector.\n\nhttps://indico.particle.mephi.ru/event/626/contribu tions/6446/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6446/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutron Studies in a Highly Segmented Detector of the T2K Experime nt DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6444@cern.ch DESCRIPTION:Speakers: Alexey Razgonyaev ()\nThe T2K long-baseline neutrino experiment studies neutrino oscillations using a beam produced at J-PARC\ , the near-detector complex ND280\, and the Super-Kamiokande far detector. The upgraded ND280 includes the Super Fine-Grained Detector (SuperFGD)\, a highly segmented plastic-scintillator target with three-dimensional read out and precise timing capabilities. These features make SuperFGD particul arly suitable for neutron studies\, since neutrons do not leave a direct i onization track before interacting.\n\nThis work presents a Monte Carlo st udy of neutron transport and energy reconstruction in SuperFGD. First\, mo noenergetic neutron samples were used to study flux attenuation as a funct ion of detector depth and neutron kinetic energy. An energy-dependent neut ron interaction cross section was extracted using the positions of first i nteractions and compared with the published SuperFGD prototype measurement on hydrocarbon.\n\nThe analysis was then extended to charged-current muon antineutrino interactions inside SuperFGD. Events were classified by inte raction mechanism and final-state topology\, with particular attention to neutron-containing final states. For each primary neutron\, its kinetic en ergy was reconstructed using the flight distance and time interval between its production point and first hadronic interaction. For neutrons whose f irst hadronic interaction occurs inside the active detector volume\, the T OF-reconstructed kinetic energy shows a strong correlation with the true v alue. A major limitation at the truth level is the finite detector volume\ , since some neutrons leave SuperFGD before interacting.\n\nThe TOF-recons tructed neutron energies were then used in a simplified truth-level calori metric reconstruction of the incident muon antineutrino energy. The result was compared with an otherwise identical estimator using the true neutron kinetic energies. The comparison shows that TOF reconstruction introduces only a small additional energy bias. This demonstrates the potential of n eutron time-of-flight information for accounting for the energy carried by neutrons in charged-current antineutrino events. The remaining energy imb alance requires further study\, including the role of nuclear effects and the treatment of the final state. Future work will also include detector r esponse\, finite timing resolution\, detection thresholds\, and hit-level reconstruction.\n\nhttps://indico.particle.mephi.ru/event/626/contribution s/6444/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6444/ END:VEVENT BEGIN:VEVENT SUMMARY:ELECTRON DETECTION IN THE SEGMENTED NEUTRINO DETECTOR SUPERFGD DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6443@cern.ch DESCRIPTION:Speakers: Alexander Polyakov ()\nElectron neutrinos in the T2 K experiment are detected through the particles produced when they interac t with matter. Charged-current interactions produce an electron\, which lo ses energy through ionization and bremsstrahlung. This work studies the si mulated energy deposition of this electron in SuperFGD\, the three-dimensi onally segmented scintillator detector of the ND280 complex\, and examines the photon background.\n\nA sample of 10\,000 primary electrons with kine tic energies from 5 to 300 MeV was studied using Geant4. Energy deposits from the primary electron and its associated secondary particles are summe d without double counting. The response is defined as the deposited energy \, corrected for rest-mass energy\, divided by the electron's initial kine tic energy.\n\nWhen the calculation is extended from the direct electron b ranch to the full cascade\, the mean response increases from 56.8% to 85.9 %. Branches initiated by bremsstrahlung photons contribute about one third of the cascade's deposited energy on average. A primary electron stopping inside the detector does not ensure full energy containment: secondary ph otons can carry energy out of the active volume.\n\nPhoton conversion into an electron-positron pair was studied at photon energies of 50\, 100 and 200 MeV. Under the simulated conditions\, the fraction of photons convert ing inside SuperFGD increases from about 62% to 84% as the photon energy r ises from 50 to 200 MeV. The energy deposited by conversion pairs is simi lar to that deposited by electrons\, so electron-photon separation also re quires information on the spatial structure of the event.\n\nThese results provide a basis for further development of methods for electron energy re construction and electron neutrino event selection. The study describes en ergy deposition in the active material\; light collection\, electronics an d full neutrino event reconstruction were not included in this analysis.\n \nhttps://indico.particle.mephi.ru/event/626/contributions/6443/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6443/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of xenon doping to liquid argon in CENNS-10 detector DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6442@cern.ch DESCRIPTION:Speakers: Yuri Koskin (NRNU MEPhI)\nCENNS-10 is a single phase liquid argon (LAr) scintillation detector deployed by the COHERENT collab oration at the Spallation Neutron Source located at the Oak Ridge National Laboratory in 2017. The detector was designed to study the Coherent Elast ic Neutrino-Nucleus Scattering (CEνNS) using the high-quality pion-decay- at-rest neutrino source. The collaboration reported the observation of CE νNS in LAr with CENNS-10 in 2020. After the science run\, a series of stu dies of LAr scintillation properties were performed. LAr as a scintillator produces 128 nm VUV light that lies well outside the reasonable sensitivi ty region of the most PMTs. Therefore\, wavelength shifters (WLS) are comm only used as a solution. CENNS-10 applies tetraphenyl-butadiene (TPB) coat ing on internal surfaces. It is known that xenon doping to LAr can act as a volume-distributed WLS. To study the scintillation properties of various xenon-argon mixtures a dedicated engineering run was conducted with diffe rent xenon concentrations. Current status of the analysis and preliminary results are discussed.\n\nhttps://indico.particle.mephi.ru/event/626/contr ibutions/6442/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6442/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of a solid-state modular reactor antineutrino detector DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6436@cern.ch DESCRIPTION:Speakers: Руслан Биктимиров (НИЦ «Курч атовский институт»)\nWe present a prototype of a modular reactor antineutrino detector based on the inverse beta decay (IBD) reacti on ($\\bar\\nu_e + p \\rightarrow n + e^+$). Each module operates as an in dependent spectrometer based on a solid plastic scintillator block measuri ng $(700 \\times 50 \\times 50) \\text{ mm}^3$\, optically coupled to two vacuum photomultiplier tubes (PMTs) with an effective photocathode diamete r of 46.5 mm. Neutron detection is planned to be performed using a $\\text {ZnS(Ag)}+\\text{B}_2\\text{O}_3$ scintillating composite\, optical fiber\ , and SiPMs. This work presents the design of the individual module and a $3 \\times 3$ module array assembly\, the corresponding experimental charg e spectra\, Monte Carlo simulation results\, and the spectrometric perform ance of the detector based on this design.\n\nhttps://indico.particle.meph i.ru/event/626/contributions/6436/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6436/ END:VEVENT BEGIN:VEVENT SUMMARY:Neural Reconstruction of Muon Tracks in Baikal-GVD Using NTSim Sim ulations DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6435@cern.ch DESCRIPTION:Speakers: Maksim Maksimov (The School of Physics and Engineeri ng\, ITMO University)\nMuon reconstruction in the Baikal-GVD neutrino tele scope requires inferring particle parameters from sparse\, irregularly dis tributed optical signals. We investigate graph neural networks and transfo rmer architectures for reconstructing muon direction and track position\, using classical track fitting as a reference. Muon energy estimation is co nsidered as an additional task.\n\nUsing Baikal-GVD events simulated with NTSim\, we will compare reconstruction accuracy and computational efficien cy under common evaluation conditions. The neural models will use detector geometry and the spatial and temporal structure of optical signals. We wi ll also explore whether joint estimation of energy and track parameters im proves reconstruction.\n\nThe comparison will examine how reconstruction e rrors depend on event characteristics and identify conditions in which the methods offer complementary strengths. This will help assess the trade-of f between accuracy and computational cost when selecting reconstruction me thods for Baikal-GVD.\n\nhttps://indico.particle.mephi.ru/event/626/contri butions/6435/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6435/ END:VEVENT BEGIN:VEVENT SUMMARY:Monte Carlo Study of PeV Muon Propagation and Secondary Particle P roduction in Gran Sasso Rock DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6434@cern.ch DESCRIPTION:Speakers: Xenia Troshina (National Research Nuclear University MEPhI\, Scientific & Educational Centre NEVOD)\nHigh-energy cosmic-ray mu ons penetrating deep underground undergo stochastic interactions in rock a nd can produce a significant secondary particle component accompanying the surviving muon. This effect becomes particularly important at muon energi es approaching the PeV range\, where radiative and photonuclear processes may result in large energy transfers and production of energetic secondary particles. In this work\, Monte Carlo simulations of high-energy muon pro pagation through the rock overburden of the Gran Sasso underground laborat ory are performed. The characteristics of the muon and secondary particles emerging from the rock are studied as a function of the initial muon ener gy. The analysis includes the residual muon energy\, secondary-particle mu ltiplicity and total energy\, as well as the contributions of electrons an d positrons\, hadrons\, and secondary muons. Particular attention is paid to the formation and evolution of the particle accompaniment generated by stochastic muon interactions in the rock. The obtained results are relevan t for the interpretation of high-energy muon events in deep underground de tectors and for studies of the response of the LVD setup to the highest-en ergy component of the underground cosmic-ray muon flux.\n\nhttps://indico. particle.mephi.ru/event/626/contributions/6434/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6434/ END:VEVENT BEGIN:VEVENT SUMMARY:The automated stand KALIF-8 for testing the characteristics of pho tomultiplier tubes DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6432@cern.ch DESCRIPTION:Speakers: Georgy Akinin (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))\nThis work is devoted to the restoration of the KALIF-8 automated test bench for evaluating the charac teristics of photomultiplier tubes of various sizes. During the work\, cab le lines were replaced\, the electronics were updated\, and the main compo nents of the measurement system were calibrated. The software for centrali zed control of the test bench was configured.\nDuring the experimental stu dies\, the main parameters of the reference photomultiplier tube were meas ured\, including gain\, linearity range\, timing and noise characteristics . To verify the reliability of the results\, a comparison was carried out with measurements obtained using an independent test bench. The operabilit y and metrological suitability of the developed system for large-scale cal ibration of photomultiplier tubes prior to their installation in detectors were demonstrated.\n\nhttps://indico.particle.mephi.ru/event/626/contribu tions/6432/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6432/ END:VEVENT BEGIN:VEVENT SUMMARY:DAQ system for the BBC Detector Based on a Microservice Architectu re DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6429@cern.ch DESCRIPTION:Speakers: Matvej Solonbekov ()\nThe BBC is a component of the SPD detector at the NICA collider. In the context of a multichannel archit ecture comprising up to 256 silicon photomultipliers with readout electron ics based on the FERS‑5200 system\, continuous real‑time monitoring of the detector status becomes essential. \n\nThis work proposes the DAQ sys tem implemented on a microservice architecture\, which overcomes the limit ations of the CAEN open-source control and readout software Janus. This sy stem includes a modified process (JanusC) that outputs data to a stream\, a converter to a packet‑based data format (raw2b)\, an event‑merging p rocess (ems)\, a file‑writing process (writer)\, as well as a converter to the ROOT representation (b2r) and a configurable histogrammer (r2h). Th e DAQ system is controlled by the supervisor process with GUI written on t he Python language using the Makefile\, which describes the system’s pro cesses interaction. The system's operation has been verified using cosmic muons with four sectors of the BBC prototype\, as well as on the Nuclotron beam with two sectors. The developed solution is suitable for operation a t the BBC prototyping stage and can be adapted for other scintillation det ectors (f.e. ZDC) with channel‑by‑channel signal readout.\n\nhttps://i ndico.particle.mephi.ru/event/626/contributions/6429/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6429/ END:VEVENT BEGIN:VEVENT SUMMARY:A double-sided thin entrance window Si(Li) detector for the applic ation in multilayer detector systems. DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6421@cern.ch DESCRIPTION:Speakers: Maxim Trushin (PNPI)\nPrecise measurements of β-spe ctra are highly relevant for a number of physical areas. For the investiga tions of the neutrino processes at nuclear reactors\, such as the reaction of inverse beta-decay\, elastic neutrino scattering on an electron or coh erent scattering on nuclei\, an accurate quantitative determination of the electron antineutrinos spectrum is required. These electron antineutrinos are emitted during beta-decays of fission fragments of uranium and pluton ium isotopes\, as well as during beta decays of various nuclei that arise as a result of neutron capture\, so their spectrum can be reconstructed f rom the measured beta-spectra. \n Our lab develops an experimental setup o f beta-spectrometer based on silicon-lithium drift Si(Li) detectors design ed to carry out the precise measurements of the beta spectra of various fi ssile isotopes of uranium and plutonium in the scheduled experiment at the PIK reactor after its launch. Individual Si(Li) detectors can be manufact ured with a sensitive region thickness of up to 1 cm\, which is sufficient to absorb electrons with an energy of up to 3.5 MeV. To register the elec trons with higher energies the multilayer spectrometer consisting of sever al Si(Li) detectors is required.\n However\, usual Si(Li) detectors manufa ctured using standard technology have an unacceptably thick entrance windo w from the n-contact side. We propose an alternative method for n-contact creation allowing to produce the Si(Li) detectors with a thin entrance win dow from both n- and p-sides. An assembly of three such thin-window Si(Li) detectors will make it possible to register the full energy of 10 MeV bet a-electrons. At the Conference the detailed description of the spectrometr ic properties of individual double-sided thin-window Si(Li) detectors and the results of entrance windows thickness measurements will be presented a nd discussed.\n To suppress the accompanying gamma background a silicon tr ansition detector with a thickness of 100–300 μm will be positioned in front of the first layer of Si(Li) detectors. Such configuration of the de tectors effectively suppressed the background signals\, but leads to a det erioration in the energy resolution of the spectra measured by the Si(Li) detector due to the passage of beta-electrons through the transition detec tor. The procedure of Si(Li) detector energy resolution restoration by the summation of pulse amplitudes of both detectors will also be discussed.\n \nhttps://indico.particle.mephi.ru/event/626/contributions/6421/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6421/ END:VEVENT BEGIN:VEVENT SUMMARY:PIN photodiode BPW34 as a photodetector for scintillation signals DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6420@cern.ch DESCRIPTION:Speakers: Alexander Velichko (Национальный исс ледовательский ядерный университет «МИ ФИ»\, Россия\, 115409\, Москва\, Каширское шос се\, 31)\, Alexey Starikov (Национальный исследова тельский ядерный университет «МИФИ»\, Ро ссия\, 115409\, Москва\, Каширское шоссе\, 31)\nTh e study examines the applicability of the commercially available silicon P IN photodiode BPW34 without internal amplification as a photodetector for scintillation light. Specifically\, the photodiode response to cosmic-muon -induced light flashes is investigated when optically coupled to a bismuth germanate crystal (BGO) and a plastic scintillator. The electronic readou t is utilized as a means of measuring and evaluating this response. During external triggering from an independent silicon photomultiplier channel ( SiPM)\, synchronized photodiode signals are observed for both the plastic and BGO scintillators. The obtained oscilloscope traces demonstrate that B PW34 can serve as a low-cost alternative to photodetectors with internal a mplification for a limited class of scintillation applications where the e xpected light signal is sufficiently large and a time resolution better th an approximately 100 ns is not required. The current results therefore es tablish a baseline for signal visibility in these geometries\, while indic ating the need for future quantitative measurements of single-event regist ration efficiency.\n\nhttps://indico.particle.mephi.ru/event/626/contribut ions/6420/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6420/ END:VEVENT BEGIN:VEVENT SUMMARY:Matrix scintillation detector with high time resolution based on s ilicon photomultipliers with epitaxial quenching resistors. DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6418@cern.ch DESCRIPTION:Speakers: Alexandr Kozhukhov ()\nA prototype of a matrix pixel detector based on LYSO scintillators with EQR15-3030 type silicon photomu ltipliers [1] has been developed\, and studies of its characteristics have been carried out. The dimensions of the detector’s scintillation elemen ts are 3×3×20 mm\; the time resolution is 150 ps\, and the energy resolu tion is about 15% for gamma ray photon energy of 511 keV. \nThe coordinate coding scheme is based on the “active matrix” principle\, which impro ves the signal-to-noise ratio during reading and significantly increases t he slew rate of the output signal from the matrix\, thereby improving the detector’s temporal resolution. Time parameters are measured using a mul tichannel TDC based on an FPGA [2]. The report will present a description of the detector\, its electronics\, and the results of characteristic meas urements.\nReferences\n1. Measurement of Time Resolution of Scintillation Detectors with EQR-15 Silicon Photodetectors for the Time-of-Flight Neutro n Detector of the BM@N Experiment / F. Guber et al. // Instrum.Exp.Tech. 67 (2024) 3\, 443-446 DOI: 10.1134/S0020441224700696\n2. Development of a 100 ps TDC based on a Kintex 7 FPGA for the high granular neutron time-of- flight detector for the BM@N experiment / D. Finogeev et al. // Nucl.Instr um.Meth. A 1059 (2024) 168952 DOI: 10.1016/j.nima.2023.168952\n\nhttps: //indico.particle.mephi.ru/event/626/contributions/6418/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6418/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the Spatial Distribution of Atmospheric Muons: FANSY Simu lations and Results from the Underground LVD experiment DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6416@cern.ch DESCRIPTION:Speakers: Natalia Agafonova (INR RAS)\nThe decoherence curve o f muon bundles in extensive air showers is investigated in this work using the FANSY 2.0 package. Using the Monte Carlo method\, the development of cascades in the atmosphere is simulated for different types of primary par ticles (protons and iron nuclei)\, a wide range of initial energies and ze nith angles. The dependence of the spatial distribution of muons at the de tector location on the characteristics of the primary cosmic radiation and the shower arrival angle is analyzed. It is shown how variations in the c omposition\, energy\, and direction of the primary particle affect the deg ree of muon-group decoherence and the shape of the distributions. Accounti ng for muon scattering in the overburden enables comparison of the simulat ion results with the decoherence curve measured in the LVD experiment (Gra n Sasso\, Italy). The obtained results allow a refined interpretation of d ata from underground experiments and an assessment of the sensitivity of t he decoherence curve to parameters of the primary cosmic-ray flux.\n\nhttp s://indico.particle.mephi.ru/event/626/contributions/6416/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6416/ END:VEVENT BEGIN:VEVENT SUMMARY:Fission-Fraction Uncertainties in the Calculation of the Antineutr ino Flux from a VVER-1000 Reactor DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6415@cern.ch DESCRIPTION:Speakers: Ivan Zhutikov (MEPhI/NRC KI)\nThe uncertainty associ ated with reactor fission fractions is an important contribution to precis ion predictions of the antineutrino flux and to antineutrino-based reactor monitoring. We evaluate the uncertainties and correlations of the fission fractions of $^{235}U$\, $^{238}U$\, $^{239}Pu$\, and $^{241}Pu$ for a VV ER-1000 reactor and propagate them to the calculated electron-antineutrino flux. Burnup-dependent atomic densities and one-group microscopic fission cross sections are obtained with the Serpent Monte Carlo code and combine d with BIPR-7A full-core calculations for the 13th fuel cycle of Unit 3 of the Kalinin Nuclear Power Plant. A Monte Carlo procedure is used to vary the nuclide atomic densities and fission cross sections within their adopt ed uncertainties\, providing fission-fraction distributions\, standard unc ertainties\, and correlation coefficients throughout a 500 effective-day f uel cycle. The correlations between the isotope fission fractions evolve s ignificantly with burnup and are explicitly included in the uncertainty pr opagation. The resulting relative contribution of fission-fraction uncerta inties to the antineutrino flux uncertainty increases from approximately 0 .25% at the beginning of the cycle to 0.42% at the end. This contribution remains below the uncertainty associated with reactor-antineutrino spectru m models\, but is comparable to the characteristic thermal-power uncertain ty and should therefore be included in precision VVER-1000 antineutrino-fl ux calculations.\n\nhttps://indico.particle.mephi.ru/event/626/contributio ns/6415/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6415/ END:VEVENT BEGIN:VEVENT SUMMARY:Spectrometric Characteristics of a Silicon PIN Diode for Gamma-Ray Detection at Room Temperature DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6413@cern.ch DESCRIPTION:Speakers: Alexander Makeev (National Research Nuclear Universi ty MEPhI\, Moscow\, Russia)\nSemiconductor radiation detectors provide hig h energy resolution\, with silicon PIN photodiodes being widely utilized d ue to their technological simplicity and affordability. This study investi gates the feasibility of using the commercially available BPW34 silicon PI N photodiode as a low-cost semiconductor detector for X-ray and soft gamma -ray spectrometry. A method for determining the optimal reverse bias volta ge was developed based on the analysis of $^{241}\\text{Am}$ energy spect ra. The optimal operating voltage was established at 60 V\, ensuring the f ormation of a depletion region sufficient for complete charge collection w hile minimizing noise. Spectra of $^{241}\\text{Am}$\, $^{133}\\text{Ba}$\ , $^{137}\\text{Cs}$\, and $^{152}\\text{Eu}$ sources were measured at roo m temperature using an experimental setup comprising a charge-sensitive pr eamplifier and an SBS-79 spectrometric analyzer. A linear calibration was performed based on photopeak positions within the energy range from 5 to 1 20 keV. The detector's energy resolution (FWHM) was found to be between 1. 26 and 1.96 keV\, depending on the gamma-ray energy. The results confirm t he linearity of the response and the stable operation of the BPW34 PIN pho todiode in spectrometric mode\, making it a promising\, cost-effective alt ernative to specialized detectors for scientific and educational applicati ons.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6413/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6413/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of DANSS photodetector signal nonlinearity DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6412@cern.ch DESCRIPTION:Speakers: Pavliuk Anastasia (MIPT\, LPI\, JNR)\, Artemiy Krapi va ()\nDANSS is a highly segmented antineutrino detector located at the Ka linin Nuclear Power Plant. The main goal of the experiment is to search fo r reactor antineutrino oscillations into a hypothetical sterile neutrino s tate. DANSS has achieved the most stringent model-independent limits aroun d Δ𝑚₁₄² ≈ 1 eV². The experiment searches for reactor antineutr ino oscillations into a sterile state by analyzing the spectrum of positro ns produced by antineutrinos in inverse 𝛽-decay (since almost all of t he antineutrino energy is transferred to the positron in this reaction). T herefore\, the accuracy of the detector's energy scale calibration is cruc ial.\nThe DANSS sensitive volume consists of 2\,500 scintillation strips\, each read by a separate silicon photomultiplier (SiPM). A group of 50 str ips is also read by a single PMT. The SiPM response becomes nonlinear at h igh light signals due to a limited number of pixels. This nonlinearity can be described using the effective number of pixels. In this study\, we exp lore the possibility of improving detector energy calibration by taking in to account individual values of the effective pixel number for each SiPM d etermined using signals from muons crossing a scintillator strip at differ ent angles. We use the full dataset accumulated over ten years of DANSS op eration.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6412/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6412/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the Single-Photoelectron Signal in Photomultiplier Tubes of the DANSS Detector DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6411@cern.ch DESCRIPTION:Speakers: Dmitry Ilyushkin ()\nThe DANSS experiment at the Kal inin NPP measures the reactor\nantineutrino flux and spectrum in order to search for sterile neutrinos\nand to address a range of fundamental and ap plied physics problems.\nThe readout of the detector's 1 m³ plastic scint illator array is\nbased on a hybrid system including photomultiplier tubes (PMTs)\nand silicon photomultipliers (SiPMs).\nHigh-precision Monte Carlo (MC) simulations\, which\nare essential for accurate energy reconstructio n\, require detailed\nmodeling of the PMT response. This work focuses on t he\nanalysis of the single-photoelectron (SPE) signal characteristics in\n these PMTs. To extract these characteristics\, the photocathodes were\nill uminated with low-intensity LED pulses of varying brightness. The\nmeasure d amplitude spectra were approximated using a convolution of a\nPoisson di stribution — accounting for electron emission statistics from\nthe photo cathode and first dynode — and a Gaussian function representing\nelectro nic noise. By analysis of the dependence of the fit parameters on\nlight i ntensity\, we derived characteristics for each\nindividual PMT. The averag ed key parameters of the readout system were\ndetermined and successfully implemented into the DANSS MC simulation\nframework.\n\nhttps://indico.par ticle.mephi.ru/event/626/contributions/6411/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6411/ END:VEVENT BEGIN:VEVENT SUMMARY:Distance estimation to supernova SN 2024ws using the EPM and SCM m ethods and assessing their applicability based on physical modeling type IIP supernovae. DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6410@cern.ch DESCRIPTION:Speakers: Taisiya Vasilyeva ()\nType IIP supernovae provide an opportunity for independent estimation of cosmological distances\, making them a valuable tool for constraining the Hubble constant and testing cos mological models. \nOne of the methods for determining distances to Type I I supernovae is the Expanding Photosphere Method (EPM)\, which does not re quire calibration via the cosmic distance ladder. \nThe EPM is based on th e geometric relationship between the angular size of the supernova photosp here and its radius. The angular size of the photosphere is estimated from photometric observations in different photometric bands\, while its radiu s can be determined from the photospheric expansion velocity measured from spectral lines. These quantities can then be used to estimate the distanc e to the supernova. \n\nThis work presents a practical algorithm for apply ing the EPM and the Standardized Candle Method (SCM) to photometric and sp ectroscopic observational data obtained with a telescope at the Caucasus M ountain Observatory of the Sternberg Astronomical Institute\, Lomonosov Mo scow State University. \nFor supernova SN 2024ws\, distances obtained usin g the two methods are estimated and comparatively analyzed.\nThe validity of the physical assumptions underlying the EPM and SCM is investigated usi ng numerical modeling type IIP supernovae.\n\nhttps://indico.particle.meph i.ru/event/626/contributions/6410/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6410/ END:VEVENT BEGIN:VEVENT SUMMARY:Radiation resistance of SiC and Si detectors after irradiation wit h alpha particles DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6409@cern.ch DESCRIPTION:Speakers: Sergey Evseev (JINR)\nThe results of research of sem iconductor detectors made of silicon carbide (SiC-SCD) [1-3] and silicon ( Si-SCD) are presented. The irradiation was carried out using a standard sp ectrometric α‑source 226‑Ra with energies E = 4.8\; 5.5\; 6.0\; 7.7 M eV. The thickness of the sensitive layer of the SiC detectors of n‑type was 25 μm and 50 μm\, and the diameter of the working area was 3.0 mm. T he initial energy resolution of the detectors was 25 keV. The Si detectors were manufactured using planar technology from n‑type silicon with a wo rking area of 7 mm^2 and a sensitive thickness of 100 μm. The radiation h ardness of SiC and Si detectors was studied before and after irradiation w ith alpha particles at integral fluxes up to ~ 2×10^11 α/cm^2. It was sh own that degradation was ob-served after irradiation: the peaks from alpha particles shifted towards the lower channels and be-came wider. It was fo und that as the radiation dose increased\, the energy resolution deteriora ted by more than an order of magnitude for SiC‑SCD 50 μm\, by a facto r of 4 for SiC 25 μm\, and by more than a factor of 2 for Si‑SCD. At the same time\, the charge collection efficiency (CCE) decreased from 100% to 80% (operating voltage 300 V) for SiC‑SCD 50 μm\, from 100% to 90% (operating voltage 200 V) for SiC‑SCD 25 μm\, and from 100% to 95% (ope rating voltage 100 V) for Si‑SCD at the maximum irradiation dose.\n\n\n1 . S.A. Evseev et al. // Physics of Atomic Nuclei. 2023. V. 86\, No. 5\, pp . 841–844.\n2. Yu.B. Gurov et al. // Instrum. Exp. Tech. 2024\, V. 67\, No. 6\, pp. 1095–1101.\n3. S.A. Evseev et al. // Physics of Atomic Nucle i. 2025. V. 88\, No. 3\, pp. 489–493.\n\nhttps://indico.particle.mephi.r u/event/626/contributions/6409/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6409/ END:VEVENT BEGIN:VEVENT SUMMARY:A Search for Boosted Dark Matter with the Borexino Detector DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6403@cern.ch DESCRIPTION:Speakers: Denis Ivanov (NRC "Kurchatov Institute" - PNPI)\nExp eriments searching for elastic scattering of non-relativistic dark matter (DM) particles off nuclei lose sensitivity at DM masses below 1 GeV\, sinc e light particles transfer to nuclei energy below the detection threshold. Scattering off electrons enables partial probing of the region of lighter particles. Relativistic particles can arise from the acceleration of DM b y cosmic-ray particles\, the neutrino background\, supernova emission\, an d a number of other processes. Boosted dark matter (BDM) particles can pro duce a detectable signal in existing neutrino detectors or DM detectors up on interaction with electrons or nuclei.\n\nThe Borexino solar neutrino de tector possesses an important advantage associated with a record-low backg round level when searching for BDM signals in the few-MeV range. In the cu rrent work\, we analyze the energy spectrum data of the Borexino detector [1\, 2] with the aim of searching for events from BDM particles accelerate d by cosmic-ray electrons and the diffuse supernova neutrino background.\n \n 1. M. Agostini et al. (Borexino coll.)\, Phys. Rev. D **101**\, 062001 (2020)\n 2. D. Basilico et al. (Borexino coll.)\, Eur. Phys. J. C **86**\, 736 (2026)\n\nhttps://indico.particle.mephi.ru/event/626/contributions/64 03/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6403/ END:VEVENT BEGIN:VEVENT SUMMARY:Effects of dynamo-enhanced magnetization and oscillations in super nova neutrino energy spectra DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6402@cern.ch DESCRIPTION:Speakers: Azamat Saimuha (Государственный ун иверситет Дубна)\nNeutrinos emitted during the gravitational core collapse supernova are the most direct probe of processes in the ste llar interior which are inaccessible to electromagnetic observations. Inte rpretation of signals from future flares by\, e.g.\, JUNO\, DUNE\, IceCube -Gen2\, KM3NeT\, Baikal-GVD detectors\, requires consideration of a comple x set of physical effects [1] including generation of ultra-strong magneti c inductions\, nonlinear evolution of neutrino fluxes etc. In this work we analyse neutrinos bursts emitted by a protoneutron star at supernova expl osion taking into account effects of magnetization and oscillations. The n eutrino acceleration near the neutrino sphere due to nuclear scattering ca used by the Gamow-Teller neutral current interaction is shown. The effect of oscillations in the outer layers of stars significantly enhances the ha rdness of the spectrum of electron antineutrinos. Such an enhancement of t he high-energy spectrum component is particularly pronounced for the inver ted mass ordering and favorable for ground-based detection of supernova ne utrinos. The possibilities of Cherenkov underwater detectors − KM3NeT an d Baikal-GVD − for observation of supernova neutrinos and reveling the m ass ordering are discussed.\n\nhttps://indico.particle.mephi.ru/event/626/ contributions/6402/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6402/ END:VEVENT BEGIN:VEVENT SUMMARY:Reconstruction Procedure for ΛΛ Pairs in Xe + CsI Collisions at 3.8A GeV in the BM@N Experiment DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6400@cern.ch DESCRIPTION:Speakers: Ksenia Alishina (JINR VB LHEP)\n**Abstract**\n\nSubt hreshold production of ΛΛ pairs in nucleus–nucleus collisions is large ly unexplored and is of particular interest for studying strangeness-produ ction mechanisms in dense baryonic matter.\n\nIn 2023\, the fixed-target B M@N experiment at the NICA–Nuclotron accelerator complex collected data from Xe + CsI collisions at a beam kinetic energy of 3.8A GeV. This work p resents the procedure used to reconstruct Λ hyperons and extract the ΛΛ signal from these data.\n\nΛ hyperons are reconstructed via the weak dec ay Λ → pπ⁻ using a displaced-vertex topology\, with the secondary de cay vertex separated from the primary interaction vertex. Events containin g two Λ candidates are analysed using the two-dimensional distribution of the invariant masses of the two pπ⁻ combinations. The number of events containing ΛΛ pairs is determined by estimating the contribution from c ombinatorial background in the two-dimensional invariant-mass plane. The s tability of the extracted ΛΛ signal is assessed by varying the Λ-candid ate selection criteria and the methods used to model the combinatorial bac kground.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6400/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6400/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-Scenario Failure Training for Robust Charged-Pion Energy Rec onstruction DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6399@cern.ch DESCRIPTION:Speakers: Ruslan Yakunin (Kazan National Research Technologica l University)\nMachine-learning-based calorimeter reconstruction is usuall y optimized under fixed detector conditions\, whereas detector response ca n be affected by dead channels\, local readout failures\, gain drift\, and noise. We study whether exposing a reconstruction model to several simula ted failure modes during training improves its robustness compared with tr aining on a single corruption type. The study uses 533-voxel charged-pion showers from CaloChallenge Dataset 1 and a layer-gated Transformer supplie d with voxel energies and operational masks. Two models with identical arc hitecture were trained: one exclusively on events with 5% randomly disable d cells\, and one on an equal mixture of clean events\, random cell loss\, contiguous dead-cell blocks\, and complete-layer failures. Evaluation was performed on an independent sample of 120\,800 showers under clean\, fami liar\, and unseen detector distortions. Multi-scenario training reduced re lative mean absolute error from 0.1804 to 0.1533 on clean events\, from 0. 1799 to 0.1610 for block failures\, and from 0.1940 to 0.1751 for a mixed unseen corruption. For physically consistent complete-layer loss\, uniform layer-averaged rMAE decreased from 0.2404 to 0.1929\, while voxel-weighte d rMAE decreased from 0.2844 to 0.2104. The gain was not universal: the si ngle-corruption regimen remained competitive near its specialized random-c ell-loss condition. These results show that multi-scenario failure trainin g improves broad robustness of charged-pion energy reconstruction while pr eserving a trade-off between generalization and narrow specialization.\n\n https://indico.particle.mephi.ru/event/626/contributions/6399/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6399/ END:VEVENT BEGIN:VEVENT SUMMARY:FLUCTUATIONS AND CORRELATIONS IN RELATIVISTIC NUCLEUS–NUCLEUS CO LLISIONS DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6398@cern.ch DESCRIPTION:Speakers: Sayora Ibraimova (Satbayev University\, Institute of Physics and Technology)\nA joint study of multi-particle pseudo-rapidity correlations and event-by-event fluctuations in the distributions of secon dary particles and fragments of the target nucleus and the projectile nucl eus was carried out in order to search for correlated clusters of secondar y particles. An analysis of the collisions of the sulfur nucleus with phot oemulsion nuclei at an energy of 200 A・GeV is presented based on experim ental data obtained at the SPS at CERN. The analysis of multi-particle cor relations was performed using the Hurst method. A detailed analysis of eac h individual event showed that in events of complete destruction of a proj ectile nucleus with a high multiplicity of secondary particles\, long-dist ance multi-particle pseudo-rapidity correlations are observed. The distrib ution of average pseudo-rapidity in such events differs significantly from others\, as it is much narrower\, and its average value is noticeably shi fted towards lower values average pseudo-rapidity.\nThis research is funde d by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. AP23487706).\n\nhttps://indico.p article.mephi.ru/event/626/contributions/6398/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6398/ END:VEVENT BEGIN:VEVENT SUMMARY:A study of nucleon and $\\Delta$ form factors with pion cloud eff ect DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6397@cern.ch DESCRIPTION:Speakers: Yubing Dong (Institute of High Energy Physics\, Chin ese Academy of Sciences\, China)\n\\begin{document}\n\n\\title{Understandi ng of electromagnetic and gravitational form factors for nucleon and $\\De lta$ with pion meson cloud}\n\n\\newcommand{\\email}[1]{\\thanks{\\href{ma ilto:#1}{#1}}}\n\n\\author[a\,b]{Jiaqi Wang\\email{jqwang@ihep.ac.cn}}\n\\ author[c]{Dongyan Fu\\email{fudongyan@impcas.ac.cn}}\n\\author[a\,b]{Yubin g Dong\\email{dongyb@ihep.ac.cn}}\n\n\\affil[a]{Institute of High Energy P hysics\, Chinese Academy of Sciences\,\nBeijing 100049\, China}\n\\affil[b ]{School of Physical Sciences\, University of Chinese Academy\nof Sciences \, Beijing 101408\, China}\n\\affil[c]{Southern Center for Nuclear-Science Theory (SCNT)\,\n\\authorcr\nInstitute of Modern Physics\, Chinese Academ y of Sciences\, Huizhou 516000\, China}\n\n\\maketitle\n\nThe electromagne tic and gravitational form factors of the nucleon and $\\Delta(1232)$ reso nance are studied\nsimultaneously using a covariant quark-diquark approach \, and the pion cloud effect on the form factors is\nexplicitly discussed. The calculated electromagnetic form factors of nucleon are compared to th e experimental\ndata in order to determine the parameters of our approach. Then\, the gravitational form factors of the\nnucleon and $Delta$-isobar are evaluated with the same parameters\, and moreover\, the transition for m\nfactors of $N-\\Delta$ are also estimated. The electromagnetic and mech anical properties\, such as the\ncharge radii\, magnetic moments\, and mas s radii are presented. Moreover\, the D-term\, which is believed to be\nco nnected with the internal force inside the baryons\, is also discussed. It is found that our results\nare in reasonable agreement with the experimen t and lattice results\, and in particular\, our results suggest\nthat the pion cloud contribution plays an indispensable role~\\cite{Wang:2026nlr\, Wang:2024abv}\,\nespecially for the magnetic moments and the D-term of the systems\, and therefore the sign problem of the\npositive D-term in our p revious model calculations with quark-diquark approach is solved~\\cite{Wa ng:2023bjp\, Fu:2023ijy}.\n\n\\begin{thebibliography}{99}\n\\bibitem{Wang: 2026nlr}\nWang\, Jiaqi and Fu\, Dongyan and Dong\, Yubing\,\n"Form factors of $\\Delta$(1232) and the electromagnetic $N-\\Delta$ transition"\, arXi v: 2602.19480.\n\n\\bibitem{Wang:2024abv} Wang\, Jiaqi and Fu\, Dongyan an d Dong\, Yubing\,\n"A systematic study of nucleon form factors with the pi on cloud effect"\, arXiv: 2410.14953\; Eur. Phys. J. 85\n1254 (2025).\n\n \\bibitem{Wang:2023bjp} Wang\, JiaQi and Fu\, Dongyan and Dong\, Yubing\, "Form factors of decuplet baryons in\n a covariant quark{\\textendash}d iquark approach"\, arXiv: 2311.07149\; Eur. Phys. J. C84\, 79 (2024).\n\n\ \bibitem{Fu:2023ijy} Fu\, Dongyan and Wang\, JiaQi and Dong\, Yubing\, "Fo rm factors of {\\ensuremath{\\Omega}}-\nin a covariant quark-diquark appro ach"\, arXiv: 2306.04869\; Phys. Rev. D 108\, 076023 (2023).\n\n\\end{theb ibliography}\n\\end{document}\n\nhttps://indico.particle.mephi.ru/event/62 6/contributions/6397/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6397/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of semileptonic charged kaon decay to neutral pion\, antimuo n and muon neutrino in OKA experiment DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6431@cern.ch DESCRIPTION:Speakers: Evgenii Zavidov (NRC KI - IHEP)\nA new high-statisti c analysis of the semileptonic decay mode of charged kaon to neutral pion\ , antimuon and muon neutrino $K^+ \\to \\pi^0 \\mu^+ \\nu_\\mu$ in OKA exp eriment is presented. The study includes preliminary results of kaon decay form-factor measurements and constraints on the Type-II 2HDM parameters.\ n\nhttps://indico.particle.mephi.ru/event/626/contributions/6431/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6431/ END:VEVENT BEGIN:VEVENT SUMMARY:State-of-art imaging in nuclear track emulsion DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6401@cern.ch DESCRIPTION:Speakers: Irina Zarubina (JINR)\nIn spite of the fact that nuc lear track emulsion (NTE) was developed more half a century ago\, it still remains a universal and cost-efficient detector. The application of NTE i s especially well grounded where tracks of nuclear particles cannot be rec onstructed 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. Сharge-to pology distributions of final states have an individual character appearin g to be some kind of a signature of the isotope under study. The NTE techn ique allows one to observe the 3D images of few-body ensembles originated in peripheral collisions and explore the fragmentation of the relativistic nuclei down to the most peripheral interactions - nuclear “white”star s [2].\nThe competitive character of the novel NTE is proved in measuremen ts of slow α particles and heavy ions (summarized in [3]). The possibilit y of α spectrometry was verified and the atom drift effect is established in measurement of decays of 60 MeV 8He nuclei implanted in NTE [4]. Corre lations of α particles in splitting of 12C nuclei by 14.1 MeV neutrons [5 ] as well as 7Li and 4He nuclei produced in 10B breakup by thermal neutron s in boron-enriched NTE [6] are studied. NTE samples were irradiated with slow Kr and Xe ions [7\,8]. Surface irradiations of NTE samples were perfo rmed with automatic movement of the 252Cf source [9].Thus\, the connection of high energy and low energy nuclear physics appears. Classic observatio ns of fundamental importance presented in “The Study of Elementary Parti cles by the Pho-tographic Method”by C. H. Powell\, P. H. Fowler and D. H . Perkins can serve as a model of clarity in our time. Our research is imp lemented in keeping with this tradition by state-of-art means. The rich co llection of videos and images of the nuclear few-body processes gathered a t the Web site is presented [1]. In terms of applications they are relevan t for the development of advanced systems of automatic search for nuclear interactions\, as well as for university education.\n\nReferences\n1. The BECQUEREL Project WEB site: http://becquerel.jinr.ru/\n2. http://becquerel .jinr.ru/movies/movies.html\n3. P. I. Zarubin “Recent applications of nu clear track emulsion technique”Phys. At. Nucl.\, 2016\, 79\, 1525-1535\; DOI: 10.1134/S1063778816130093. https://link.springer.com/article/10.1134 /S1063778816130093\n4. http://becquerel.jinr.ru/miscellanea/8He/8He.html\n 5. http://becquerel.jinr.ru/miscellanea/DVIN/dvin11.html\n6. http://becque rel.jinr.ru/miscellanea/IBR-2/IBR-2.html\n7. http://becquerel.jinr.ru/misc ellanea/IC-100/IC-100.html\n8. http://becquerel.jinr.ru/miscellanea/U400M/ U400M.html\n9. http://becquerel.jinr.ru/miscellanea/Prague-dosimetry/Pragu e-dosimetry.html\n\nhttps://indico.particle.mephi.ru/event/626/contributio ns/6401/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6401/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of the decay of the J/ψ meson using neural networks for data analysis in particle physics. DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6433@cern.ch DESCRIPTION:Speakers: Алексей Епифанов (студент)\, Макар Ямпурин (Арзамасский политехничес кий институт (филиал) федерального госуд арственного бюджетного образовательног о учреждения высшего образования «Нижег ородский государственный технический у ниверситет им. Р.Е. Алексеева»)\nThe presented wor k discusses the features of the developed fully connected three-layer neur al network for data analysis. The model was created to process .root data from the open CERN data library. The goal of this model is to identify the rare process of B+-meson production and its subsequent decay: B⁺ → J/ ψ + K⁺\, J/ψ → μ⁺ + μ⁻.\n\nB⁺ mesons contain a b quark and a re heavy\, unstable particles. In a real experiment\, most of the recorded data is “background”: random combinations of particles that\, in term s of their kinematic characteristics\, are similar to the decay being soug ht. The neural network acts here as a “smart” filter that discards any thing that is not a decay. Several physical features are fed into it as in put\, and then the network calculates the probability that the event is a signal. Our neural network demonstrated high accuracy values (0.977) in fi ltering the signal from the background\, thereby demonstrating the applica bility of deep learning methods in collider data analysis.\n\nhttps://indi co.particle.mephi.ru/event/626/contributions/6433/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6433/ END:VEVENT BEGIN:VEVENT SUMMARY:PROPORTIONAL COUNTER FOR DARK PHOTON SEARCH IN THE PHELEX EXPERIME NT DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6430@cern.ch DESCRIPTION:Speakers: Алексей Соломатин (ИЯИ РАН)\nT he report describes a proportional counter developed for the search for co ld dark matter\, presumably consisting of hidden photons\, in the PHELEX e xperiment (PHoton-ELectron EXperiment). The two-cathode counter is aimed a t searching for diurnal variations in the count rate of single electrons e mitted from the surface of the metal cathode of the proportional counter\, presumably as a result of the photoelectric effect caused by the conversi on of dark photons on the surface of the metal cathode. Measurement result s and directions for possible further development of the experiment based on the developed counter are presented.\n\nhttps://indico.particle.mephi.r u/event/626/contributions/6430/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6430/ END:VEVENT BEGIN:VEVENT SUMMARY:The $pp\\to pn\\pi^+$ reaction with proton-neutron final state in teraction DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6428@cern.ch DESCRIPTION:Speakers: Nadezhda Ladygina (JINR)\nThe reaction of $\\pi$ -me son production in proton-proton collision is considered at an energy of 80 0 MeV. Two reaction mechanisms are taken into account to describe the proc ess. One of them is the one-pion exchange mechanism. \nThe pion-nucleon in teraction is described by an energy-dependent parameterization.\n\nAlso\, the final state interaction between the two nucleons is included in the co nsideration. This mechanism is described by the NN wave function\, which i s obtained by the matrix inversion method. As a result\, the reaction ampl itude is determined\, which allows calculating both the differential cross section and any polarization observables.\n\nhttps://indico.particle.meph i.ru/event/626/contributions/6428/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6428/ END:VEVENT BEGIN:VEVENT SUMMARY:Thermalization of dark atoms DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6493@cern.ch DESCRIPTION:Speakers: Данила Сопин ()\nHeavy strongly interacti ng dark matter particles are excluded by data from several experiments (IM P-7/8\, XQC\, RRS\, CRESST\, CDMS\, and others) within scenarios which ass ume a velocity-independent nuclear elastic scattering cross section. Howev er\, taking into account the location of the detectors avoids some of the constraints if energy loss leads to an increase in such cross section. Sce narios of the thermalization of 2-10 TeV particles were analyzed for sever al functions $\\sigma = \\sigma (v)$. The velocity and angular distributio ns for several penetration depths into the atmosphere and the upper layers of rock were calculated. The results are compared with existing constrain ts on SIMPs.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6 493/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6493/ END:VEVENT BEGIN:VEVENT SUMMARY:Preliminary estimation of the Baikal-GVD detector sensitivity to d iffuse astrophysical neutrino flux in track-like event analysis DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6427@cern.ch DESCRIPTION:Speakers: Daria Busel (NRNU MEPhI)\nThe Baikal-GVD neutrino te lescope is situated in Lake Baikal at depths of $750$ – $1275$ m. Its c urrent instrumented volume is $0.8$ km$^{3}$\, and it is being expanded to ward $1$ km$^{3}$. Baikal-GVD is capable of detecting neutrinos in TeV-PeV energy range\, including those of astrophysical origin. Previously Baikal -GVD has demonstrated an observation of astrophysical neutrino flux in the cascade detection channel. Present work focuses on development of likelih ood-based analysis technique aimed at the diffuse astrophysical neutrino f lux search using muon track detection channel. Preliminary results on its sensitivity analysis are presented.\n\nhttps://indico.particle.mephi.ru/ev ent/626/contributions/6427/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6427/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclotron beam-test results for the SPD Beam-Beam Counter prototyp e. DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6426@cern.ch DESCRIPTION:Speakers: Nikita Fomichev ()\nA prototype for the BBC subsyste m was mounted at the Internal Target Station (ITS) of the Nuclotron/NICA a ccelerator complex and tested with ¹²⁴Xe beam at an energy of 2.2 GeV/ nucleon. Two sectors\, each consisted of 8 scintillation tiles\, were test ed using with the full data acquisition system based on the FERS5200 elect ronics.\n\nThe study describes the data obtained in both trigger and trigg erless modes. The contribution of the detected nuclear fragments are clear ly identifiable on the energy deposition correlation histograms. This res ult demonstrates the system’s efficiency and becomes an important step t oward the development of the BBC subsystem for the upcoming SPD experiment .\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6426/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6426/ END:VEVENT BEGIN:VEVENT SUMMARY:Polymer Composite Scintillators Based on Halide Perovskite Nanocry stals for X-Ray Imaging DTSTART;VALUE=DATE-TIME:20261027T162500Z DTEND;VALUE=DATE-TIME:20261027T163000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6492@cern.ch DESCRIPTION:Speakers: Aleksandr Knysh (1National Research Nuclear Universi ty MEPhI (Moscow Engineering Physics Institute)\, Moscow\, 115409 Russia 2 Life Improvement by Future Technologies (LIFT) Center\, Moscow\, 121205 Ru ssia)\nPolymer Composite Scintillators Based on Halide Perovskite Nanocrys tals for X-Ray Imaging\n-------------------------------------------------- ----------------------\n\n\nA. A. Knysh$^1$$^\,$$^2$\, P. M. Sokolov$^1$$^ \,$$^2$\, V. V. Sosnovtsev$^1$\, P. S. Samokhvalov$^1$$^\,$$^2$\n\n$^1$Nat ional Research Nuclear University MEPhI (Moscow Engineering Physics Instit ute)\, Moscow\, 115409 Russia\n\n$^2$Life Improvement by Future Technologi es (LIFT) Center\, Moscow\, 121205 Russia\n\nThe performance of indirect X -ray imaging systems depends on the ability of a scintillator to efficient ly convert X-rays into visible light while preserving the spatial distribu tion of the transmitted radiation. High-resolution imaging therefore requi res efficient X-ray absorption and radioluminescence (RL) combined with th in\, optically homogeneous scintillation layers. Metal-halide perovskites are promising for this purpose due to their strong X-ray absorption\, effi cient photoluminescence (PL)\, and compatibility with solution-based fabri cation [1]. In particular\, CsPbBr$_{3}$ perovskite nanocrystals (PNCs) ex hibit a high effective atomic number Z$_{eff}$ ≈ 63.2) and PL quantum yi elds approaching 100% [2]\, while their incorporation into polymer matrice s enables the fabrication of thin-film composite scintillators.\n\nIn this work\, thin-film scintillators based on CsPbBr$_{3}$ PNCs embedded in a m odified poly(methyl methacrylate) (PMMA) matrix were fabricated and tested for X-ray imaging. Films with thicknesses up to approximately 500 μm wer e found to be preferable for high-resolution imaging. A dedicated experime ntal setup was assembled in which the radiographic image was formed by the X-ray shadow of the investigated object projected onto the scintillator s urface and converted into visible emission. The image was recorded using a conventional digital camera (Canon EOS R6 Mark II)\, with an Apogee 5500 Series X-ray tube operated at 50 kV as the radiation source. Using a TYP 3 9-A test pattern with 0.03-mm-thick lead lines\, a spatial resolution of a pproximately 8-9 lp/mm was achieved at an exposure time of 5-10 s.\nThe th ermal stability of both PL and RL intensities was also investigated. Only a minor decrease in emission intensity relative to its initial value was o bserved after the heating-cooling cycle. Radioluminescence remained detect able even at 445 K\, while the relative decline of RL intensity was lower than that of CsI:Tl\, BGO and GAGG:Mg\,Ce over the investigated temperatur e range. \n\nOverall\, the results demonstrate the potential of CsPbBr$_{3 }$/polymer thin-film scintillators for high-resolution X-ray imaging using a simple optical readout scheme. \n\nKeywords: scintillators\, CsPbBr$_{3 }$\, radioluminescence\, X-ray imaging\, spatial resolution. \n\nREFERENCE S\n\n1. Yang\, Z. et al. Designer Bright and Fast CsPbBr$_{3}$ Perovskite Nanocrystal Scintillators for High-Speed X-Ray Imaging. Nat Commun 2024\, 15 (1)\, 8870.\n2. Knysh\, A. et al. Principles of Chemical Designing of S tyrene-Based Plastic Scintillators Doped with Quantum Dots. Phys. Atom. Nu clei 2024\, 87 (11)\, 1744–1749.\n\nhttps://indico.particle.mephi.ru/eve nt/626/contributions/6492/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6492/ END:VEVENT BEGIN:VEVENT SUMMARY:Directed flow of charged pions in Xe+Cs(I) collisions at the beam energy of 3.8A GeV with BM@N experiment DTSTART;VALUE=DATE-TIME:20261027T162000Z DTEND;VALUE=DATE-TIME:20261027T162500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6491@cern.ch DESCRIPTION:Speakers: Фёдор Карпушкин ()\nThe anisotropic fl ow of produced particles provides the insight into the transport propertie s and the equation of state (EoS) of strongly interacting matter. This tal k presents directed flow ($v_1$) measurements of charged pions in Xe+Cs(I) collisions at 3.8A GeV\, obtained with the BM@N experiment. Pion directed flow is studied as a function of centrality\, rapidity\, and transverse m omentum. The results are compared with existing world data\, and their imp lications for constraining the EoS of dense baryonic matter are discussed. \n\nhttps://indico.particle.mephi.ru/event/626/contributions/6491/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6491/ END:VEVENT BEGIN:VEVENT SUMMARY:Two-Body Decays of Bottom Baryons into Pentaquarks and Vector Meso ns DTSTART;VALUE=DATE-TIME:20261027T161500Z DTEND;VALUE=DATE-TIME:20261027T162000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6445@cern.ch DESCRIPTION:Speakers: Millena Voronenko ()\nThe LHC collider is the only m achine to study physics of bottom baryons. Among a majority of decays obse rved\, the hidden-charm pentaquark observation is one of the most importan t output by the LHCb Collaboration. In the $\\Lambda_b$- and $\\Xi_b$-bary on decays both unflavor and strange pentaquarks accompanied by a light pse udoscalar meson were found. Doubly-strange pentaquarks are still waiting f or their discovery in a similar channel or with a vector meson instead. Th e later ones seem to be more interesting for experimental Doubly-strange p entaquark observation by the LHCb Collaboration. The flavor $SU(3)$-symmet ry can be used to relate widths of bottom-baryon weak decays into a pentaq uark and light vector meson and predict their ratios as well as specify t he most promising experimental channels.\n\nhttps://indico.particle.mephi. ru/event/626/contributions/6445/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6445/ END:VEVENT BEGIN:VEVENT SUMMARY:Photomultiplier tubes for optical modules: Study for Hyper-Kamioka nde outer detector. DTSTART;VALUE=DATE-TIME:20261027T160500Z DTEND;VALUE=DATE-TIME:20261027T161000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6424@cern.ch DESCRIPTION:Speakers: Yan Stroke (INR RAS)\nThis work addresses the combin ed use of photomultiplier tubes (PMTs) and polymethyl methacrylate (PMMA) wavelength‑shifting (WLS) plates within optical modules of the Hyper‑K amiokande outer detector. The goal is to identify the PMT parameters that critically affect the module’s light yield and the veto efficiency. A co mparative analysis of several PMT types with different photocathode charac teristics and dark‑noise levels is performed. Special attention is paid to the local cathode sensitivity at the optical contact area with the WLS plate\, as this factor governs the conversion efficiency of the shifted li ght.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6424/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6424/ END:VEVENT BEGIN:VEVENT SUMMARY:Measuring correlations using local and nonlocal quenches DTSTART;VALUE=DATE-TIME:20261027T160000Z DTEND;VALUE=DATE-TIME:20261027T160500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6423@cern.ch DESCRIPTION:Speakers: Alexey Mikhaylenko (LPI RAS\, Skoltech)\nWe present a theoretical proposal for measuring correlation functions in a quantum fi eld system based on the use of quantum quenches. Using the examples of mas sive and massless scalar field theories\, we show that a short-term pertur bation of the system leads to a dependence of the further evolution of the average field on the initial state’s correlation functions. Considering two types of perturbations\,namely local and nonlocal quenches\, we show which correlation functions can be measured in each of these cases. The pr oposed procedure can be applied to study non-Gaussian correlations.\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6423/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6423/ END:VEVENT BEGIN:VEVENT SUMMARY:Studying the stability of the background count rate in the 𝜈GeN experiment DTSTART;VALUE=DATE-TIME:20261027T155500Z DTEND;VALUE=DATE-TIME:20261027T160000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6422@cern.ch DESCRIPTION:Speakers: Boris Degtyarev (NRNU MEPhI)\nThis study investigate s the stability of background conditions in the νGeN experiment at the Ka linin Nuclear Power Plant. It is demonstrated that fluctuations of the bac kground count rate of the germanium detector inside the passive shielding are correlated with the intensity of photoabsorption peaks from radon-rela ted gamma rays. Using data from periods with different intensity of these peaks\, an energy spectrum of radon-related contribution to the experiment 's region of interest is obtained.\n\nhttps://indico.particle.mephi.ru/eve nt/626/contributions/6422/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6422/ END:VEVENT BEGIN:VEVENT SUMMARY:Feasibility study of anisotropic flow measurements for $\\phi$-mes ons in the MPD experiment using enhanced production DTSTART;VALUE=DATE-TIME:20261027T155000Z DTEND;VALUE=DATE-TIME:20261027T155500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6490@cern.ch DESCRIPTION:Speakers: Daria Flusova (Tomsk Polytechnic University\, Joint Institute for Nuclear Research)\nMeasurements of collective flow provide a ccess to the equation of state (EOS) of dense baryonic matter and offer in sights into the initial collision geometry. Strange particles\, produced d uring the hadronic phase\, serve as probes of the strangeness enhancement mechanism in heavy-ion collisions. The $\\phi$ vector meson resonance ther efore plays a key role in future studies\; however\, reliable measurements of its directed ($v_1$) and elliptic ($v_2$) flow require large event sta tistics. In this work\, we explore the feasibility of performing such meas urements at the MPD experiment at 9.2 GeV by enhancing the dataset with si mulated artificial $\\phi$-meson production to achieve sufficient statisti cal precision.\n\nhttps://indico.particle.mephi.ru/event/626/contributions /6490/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6490/ END:VEVENT BEGIN:VEVENT SUMMARY:Signal readout system for cryogenic CsI(pure) scintillation detect or of tritium neutrino DTSTART;VALUE=DATE-TIME:20261027T154500Z DTEND;VALUE=DATE-TIME:20261027T155000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6441@cern.ch DESCRIPTION:Speakers: Denis Kalashnikov (national research nuclear univers ity mephi)\nWe discuss the signal readout system for cryogenic CsI(pure) s cintillation detector of tritium neutrino. This detector is constructed in the frame of SATURN experiment for search of electromagnetic properties o f neutrino in tritium decay. The elastic scattering of these neutrino at e lectrons in CsI scintillator deposits the energy below 1 keV that requires detection of extremely low signals. For this purpose\, the CsI detector w ith SiPM light readout is placed in cryostat with liquid nitrogen temperat ure. The signals after photodetectors are additionally amplified for abou t three orders and arrange the event trigger. The wave-forms of the signal s are digitized in fast analog-to-digital convertor. This work presents t he current state of a detector readout system.\n\nhttps://indico.particle. mephi.ru/event/626/contributions/6441/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6441/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent results in exotic hadron spectroscopy with ψ(2S) in final states DTSTART;VALUE=DATE-TIME:20261027T154000Z DTEND;VALUE=DATE-TIME:20261027T154500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6419@cern.ch DESCRIPTION:Speakers: Alexander Tulupov ()\nB-meson decays with ψ(2S) in the final state offer a way to study exotic hadrons with hidden charm alon gside studies with J/ψ. This contribution reviews results from Belle\, Ba Bar\, CMS\, and LHCb\, from the first observation of the charged Z(4430) s tructure to recent amplitude analyses. The focus is on recent LHCb studies of B⁺ → ψ(2S)K⁺π⁺π⁻ and B⁺ → ψ(2S)K⁰ₛπ⁺ decays\, which reveal new exotic structures and provide further information on the properties of Z(4430)⁺.\n\nhttps://indico.particle.mephi.ru/event/626/c ontributions/6419/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6419/ END:VEVENT BEGIN:VEVENT SUMMARY:Second-order perturbation theory corrections to hyperfine structur e of muonic helium DTSTART;VALUE=DATE-TIME:20261027T153500Z DTEND;VALUE=DATE-TIME:20261027T154000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6417@cern.ch DESCRIPTION:Speakers: Ksenia Seredina (Самарский национал ьный исследовательский университет име ни академика С.П. Королева)\nUsing perturbation theor y for the fine-structure constant α and the electron-to-\nmuon mass ratio \, we calculate new contributions to the hyperfine structure of the\ngroun d state of the muon-electron helium atom. Compared to our previous results \,\nwe incorporated new corrections in the second order of perturbation th eory. This\ncalculation reduces the discrepancy between the theoretical va lue and the new ex-\nperimental hyperfine structure measurement.\n\nhttps: //indico.particle.mephi.ru/event/626/contributions/6417/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6417/ END:VEVENT BEGIN:VEVENT SUMMARY:Elastic Scattering of Neutrons with Orbital Angular Momentum on Nu clear Targets DTSTART;VALUE=DATE-TIME:20261027T153000Z DTEND;VALUE=DATE-TIME:20261027T153500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6489@cern.ch DESCRIPTION:Speakers: Alisa Chaikovskaia (ITMO University)\nWe study the s cattering of twisted neutrons with orbital angular momentum (OAM) from nuc lear targets. A theoretical model is developed for Laguerre-Gaussian neutr on states\, accounting for nuclear and electromagnetic interactions and th eir interference.\n\nWe show that OAM and beam localization significantly modify the differential scattering cross section\, while spatially inhomog eneous polarization produces characteristic azimuthal modulations. The int erference between nuclear and electromagnetic amplitudes is sensitive to t he phase of the nuclear scattering amplitude\, making angular asymmetries a potential tool for its experimental investigation. Our results demonstra te new possibilities for controlling and probing low-energy neutron-nucleu s interactions using structured neutron beams.\n\nhttps://indico.particle. mephi.ru/event/626/contributions/6489/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6489/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of a scintillation spectrometer for measuring energy s pectra of beta particles from fission products of uranium and plutonium is otopes DTSTART;VALUE=DATE-TIME:20261027T152500Z DTEND;VALUE=DATE-TIME:20261027T153000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6440@cern.ch DESCRIPTION:Speakers: Polina Sushkova (National Research Nuclear Universit y MEPhI)\, Daniel Popov ()\nTo measure cumulative beta-particle spectra of uranium and plutonium fission products\, the BETA experimental facility i s located at the output of the 11th neutron beam of the research reactor a t the National Research Center Kurchatov Institute. The experiment simulta neously measures beta-particle spectra from uranium and plutonium targets\ , as well as the background spectrum\, in the same neutron flux. As part o f the upgrade of the BETA facility\, a scintillation beta spectrometer has been developed and the first measurements with radioactive sources are pr esented.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6440/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6440/ END:VEVENT BEGIN:VEVENT SUMMARY:Pair production of heavy quarkonia in Z-boson decays DTSTART;VALUE=DATE-TIME:20261027T152000Z DTEND;VALUE=DATE-TIME:20261027T152500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6414@cern.ch DESCRIPTION:Speakers: Artem Skakun (Samara National Research University)\n The processes of paired charmonium and bottomonium production in Z-boson d ecays are investigated within the relativistic quark model. Various decay mechanisms\nare examined\, and relativistic decay amplitudes are construct ed\, taking into account\nthe relative momenta of heavy quarks. Decay widt hs are calculated for various mechanisms in the nonrelativistic approximat ion and taking into account relativistic corrections.\n\nhttps://indico.pa rticle.mephi.ru/event/626/contributions/6414/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6414/ END:VEVENT BEGIN:VEVENT SUMMARY:Quasi-continuous electron generation in a pyroelectric accelerator driven by periodically varying temperature DTSTART;VALUE=DATE-TIME:20261027T151500Z DTEND;VALUE=DATE-TIME:20261027T152000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6408@cern.ch DESCRIPTION:Speakers: Andrei Oleinik (Belgorod State Unversity)\, Artemiy Klenin (Belgorod National Research University)\nDevelopment of compact poc ket-style electron accelerators meeting safety regulations is a complement ary task requiring stable\, reliable\, and reproducible particle sources w ith controllable parameters. We employed a new approach for pyroelectric a ccelerator operation - periodically varying temperature of lithium tantala te (LiTaO3) crystal. It enables to generate stable quasi-continuous electr on beam with energy about few tens of keV. We managed to observe and chara cterize the avalanche process at pyroelectric effect in surrounding vacuum conditions. This phenomenon is responsible for multiplication of electron s between pyroelectric crystal and metallic target. We have demonstrated t he great potential of this compact electron source by performing reliable energy-dispersive spectroscopy for element analysis of solid samples.\n\n\ nThe research was supported by a grant from the Russian Science Foundation (Project No. 26-72-10002).\n\nhttps://indico.particle.mephi.ru/event/626/ contributions/6408/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6408/ END:VEVENT BEGIN:VEVENT SUMMARY:Modeling the energy dependence of the 237-Np(n\,f) reaction cross- section in the 0.1–30 MeV range DTSTART;VALUE=DATE-TIME:20261027T151000Z DTEND;VALUE=DATE-TIME:20261027T151500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6439@cern.ch DESCRIPTION:Speakers: Ksenia Enenko (National Research Nuclear University MEPhI)\nA general understanding has emerged regarding the processes govern ing a wide range of nuclear reactions\, particularly fission—see\, for e xample\, the review in [1]. Based on this understanding\, computer codes h ave been developed to calculate total and partial cross-sections for the i nteraction of nuclei with light nuclear particles\, specifically neutrons. All such codes rely on models describing various stages of the reaction\, and each model involves specific parameters. Typically\, however\, only s ome of these parameters can be fixed\, while the values of others remain u ncertain.\nIn this work\, we calculate the fission cross-section of the 23 7-Np nucleus as a function of incident neutron energy in the 0.1–30 MeV range and compare the results with experimental data [2–4]. This reactio n was selected because recent work [5] provided additional information on the process—specifically\, measurements of fission fragment angular anis otropy in the 0.4–200 MeV range. Reference [5] also presented a novel me thod for calculating angular anisotropy and demonstrated that a joint comp arison of calculated and measured values for both the fission cross-sectio n and angular anisotropy will allow obtaining additional information about the fission process. However\, the authors of [5] were unable to reproduc e the observed dependence of the fission cross-section on incident neutron energy in certain energy intervals.\nIn the present work\, the open-sourc e code TALYS (version 2.2) [6] was used to model the 237-Np(n\,f) reaction for incident neutron energies ranging from 0.1 to 30 MeV. The complexity of modeling fission arises from the fact that\, in addition to the optical model and level-density model parameters built into the code\, we must al so consider parameters defining the shapes of fission barriers and nuclear characteristics at those barriers. Typically\, calculations performed in TALYS using default parameters fail to accurately reproduce the energy dep endence of the fission cross-section. This case turned out to be exactly l ike this. Therefore\, in this work\, the parameters that determine both th e shape of the double-humped fission barriers of Np isotopes with mass num bers from 238 to 235\, as well as the collective increase in the level den sity and the shape of the nuclei on the humps of the barriers of these sam e isotopes\, were varied. This approach enabled us to reproduce the experi mentally observed energy dependence of the fission cross-section with high accuracy. The resulting parameter values can be incorporated into models describing the angular anisotropy of fission fragments in the ²³⁷Np(n\ ,f) reaction\, thereby yielding new insights into the characteristics of t ransition states at the fission barriers.\n\n1. Capote R. et al. Nuclear D ata Sheets\, v. 110\, p. 3107 (2009).\n2. Shcherbakov O.A. et al. JNST\, v . 39\, suppl. 2\, p. 230 (2002).\n3. Paradela C. et al. PRC\, v. 82\, 0346 01 (2010).\n4. Vorobyev A.S. et al. Bull. Russ. Acad. Sci.: Phys.\, v. 89\ , p. 1329 (2025).\n5. Vorobyev A.S. et al. JETP Letters\, v. 110\, p. 242 (2019).\n6. Koning A.J.\, Hilaire S.\, Goriely S. EPJA\, v. 59\, p. 131 (2 023).\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6439/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6439/ END:VEVENT BEGIN:VEVENT SUMMARY:Checking of beta and antineutrino spectra symmetry by the use of JUNO detector DTSTART;VALUE=DATE-TIME:20261027T150500Z DTEND;VALUE=DATE-TIME:20261027T151000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6407@cern.ch DESCRIPTION:Speakers: Svetlana Ingerman (INR RAS)\nComparison of energy sp ectra of electrons and antineutrinos can help in understanding the mechani sm of beta decay\, which is not fully clear yet. Measuring an antineutrino spectrum from a known beta isotope requires an experiment with a large\, high-resolution detector and a powerful source. Mirror symmetry can be che cked by measuring the antineutrino spectrum and comparing it to the beta o ne. Modern detectors of large volume allow to make this with a powerful en ough source. The main challenge is obtaining a pure\, powerful source. We propose to measure the antineutrino spectrum using a high-activity radioac tive source of 90Sr-90Y (~1 MCi)\, located on the top of large volume dete ctor\, for example the current JUNO experiment.\n\nhttps://indico.particle .mephi.ru/event/626/contributions/6407/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6407/ END:VEVENT BEGIN:VEVENT SUMMARY:More on holographic color superconductivity DTSTART;VALUE=DATE-TIME:20261027T150000Z DTEND;VALUE=DATE-TIME:20261027T150500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6406@cern.ch DESCRIPTION:Speakers: Hoang Vu Nguyen (BLTP/JINR)\nIn this project\, we co nsider the Einstein-Maxwell gravity to describe the color superconductivit y in the odd dimensional SU(N_c) arbitrary gauge theory in the boundary (e ven dimensional bulk). We study the equation of motion of the color superc onductivity in different dimension bulk and the number of color.\n\nhttps: //indico.particle.mephi.ru/event/626/contributions/6406/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6406/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino spin oscillations in spatially inhomogeneous magnetic fie lds of realistic astrophysical objects DTSTART;VALUE=DATE-TIME:20261027T145500Z DTEND;VALUE=DATE-TIME:20261027T150000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6438@cern.ch DESCRIPTION:Speakers: DEGANG WANG ()\nWe study neutrino spin and spin-flav or oscillations in spatially inhomogeneous multipolar magnetic fields of r ealistic astrophysical objects. Starting from the general neutrino electro magnetic interaction Hamiltonian\, we derive the effective interaction Ham iltonian for an arbitrarily moving neutrino in a multipolar magnetic field expressed in spherical coordinates. An exact analytic expression for the geometric phase arising from the spatial inhomogeneity of the magnetic fie ld is obtained. For the particular cases of neutrino propagation inside th e astrophysical object along radial direction\, the resonance conditions a nd adiabaticity parameters for spin-flip transitions are analyzed in core- collapse supernovae\, using realistic magnetic field models and matter den sity profiles.\n\nhttps://indico.particle.mephi.ru/event/626/contributions /6438/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6438/ END:VEVENT BEGIN:VEVENT SUMMARY:Revisiting clusters of PBHs as dark matter candidates DTSTART;VALUE=DATE-TIME:20261027T145000Z DTEND;VALUE=DATE-TIME:20261027T145500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6405@cern.ch DESCRIPTION:Speakers: Максим Краснов (National Research Nucle ar University MEPhI)\nIn this paper we revisit Primordial Black Holes (PBH s) clusters as Dark Matter (DM) candidates. Here we present continuation o f our previous work\, extending the analysis. The analysis is devoted to r e-consideration of constraint on PBH abundance from stellar cluster observ ation in dwarf galaxy Eridanus II. We take into account non-trivial densit y profile of PBH clusters in order to re-estimate the energy exchange betw een PBHs and stars. Here we keep momentum approximation to strengthen the constraint making it robust. The impact of density profile concludes in th e form of Coulomb logarithm\, making analysis trivial\, but showing import ant result. It is shown that density profile matters and energy exchange c an be suppressed due to it considerably\, making clusters of PBHs viable\n DM candidates\, if their core radius is sufficiently large.\n\nhttps://ind ico.particle.mephi.ru/event/626/contributions/6405/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6405/ END:VEVENT BEGIN:VEVENT SUMMARY:Calculation of antineutrino and beta particle spectra of uranium a nd plutonium isotope fission products in thermal and fast neutron reactors DTSTART;VALUE=DATE-TIME:20261027T144500Z DTEND;VALUE=DATE-TIME:20261027T145000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6476@cern.ch DESCRIPTION:Speakers: Вячеслав Зайцев ()\nIn this work\, the most accurate model for calculating the cumulative antineutrino and beta particle spectra of uranium and plutonium isotope fission products was dev eloped and verified by comparison with experimentally obtained spectra of 92Rb\, 142Cs\, 90Sr\, 90Y and 40K. The developed model shows best agreemen t with neutrino reactor experiments\, such as RENO and Daya Bay\, among al l existing summation models. Additionally\, the obtained model shows absen ce of reactor antineutino anomaly within the margin of error. Based on thi s model\, the expected cumulative antineutrino spectra from uranium and pl utonium fission in thermal and fast neutron reactors were obtained.\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6476/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6476/ END:VEVENT BEGIN:VEVENT SUMMARY:SPH simulation of neutron star merger DTSTART;VALUE=DATE-TIME:20261027T144000Z DTEND;VALUE=DATE-TIME:20261027T144500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6404@cern.ch DESCRIPTION:Speakers: Dmitriy Kudryashov ()\nThe first results of numerica l simulations of the neutron star merger process using the smoothed partic le hydrodynamics (SPH) method are presented. To generate the initial equil ibrium configuration of the binary system that accounts for the tidal defo rmation of the components\, a new method has been applied: halted-pendulum relaxation. The method has been implemented in the well-known astrophysic al code PHANTOM. In particular\, values of the quadrupole moments of the s tars at various separations from each other have been obtained as a result of the simulations. They enable the calculation of the gravitational-wave signal generated by the system and the determination of its deviation fro m the classical point-mass case described by Einstein's quadrupole formula .\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6404/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6404/ END:VEVENT BEGIN:VEVENT SUMMARY:Charged-particle distributions in heavy-ion collisions at the LHC Run 3 energy studied with the HYDJET and HYDJET++ Monte Carlo generators. DTSTART;VALUE=DATE-TIME:20261027T143500Z DTEND;VALUE=DATE-TIME:20261027T144000Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6437@cern.ch DESCRIPTION:Speakers: Vladislav Bratyshev (Faculty of Physics\, Moscow Sta te University)\nThe Monte Carlo event generators HYDJET and HYDJET++ are w idely used to simulate high-energy heavy-ion collisions. This study compar es their predictions with LHC measurements in Pb-Pb collisions at the LHC Run 3 energy 5.36 TeV in c.m.s. per nuclear pair. Charged-particle pseudor apidity spectra and multiplicity as a function of collision centrality are investigated. It is found that both HYDJET++ with its default tune and HY DJET with the special tune reproduce the experimental data well at LHC ene rgies.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6437/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6437/ END:VEVENT BEGIN:VEVENT SUMMARY:Experiment to search for heliogeophysical phenomena in cosmic rays in Earth orbit DTSTART;VALUE=DATE-TIME:20261027T143000Z DTEND;VALUE=DATE-TIME:20261027T143500Z DTSTAMP;VALUE=DATE-TIME:20261026T021709Z UID:indico-contribution-323-6508@cern.ch DESCRIPTION:Speakers: Andrey Arkhangelskiy (National Research Nuclear Univ ersity MEPhI (Moscow Engineering Physics Institute))\, Andrey Mayorov (Nat ional Research Nuclear University MEPhI)\nThe "Nadya" compact precision sp ectrometer\, currently under development at MEPhI (National Research Nucle ar University)\, is designed to detect and identify directional charged-pa rticle fluxes in the energy range from several tens to several hundred MeV . This energy range is of interest for the search for and detailed study o f heliogeophysical phenomena\, Earth's magnetospheric physics\, radiation belt dynamics\, and the spatiotemporal variations of the low-energy compon ent of galactic cosmic rays (GCRs) in high-latitude regions. The experimen t's scientific program focuses particularly on the continuous monitoring o f solar cosmic rays (SCRs) and the investigation of the mechanisms governi ng their generation\, acceleration\, and propagation in the interplanetary medium during periods of heightened solar activity. The data obtained wil l be vital for real-time space weather monitoring\, modeling the radiation environment in near-Earth space\, and assessing radiation loads on spacec raft onboard electronics\; these data will complement findings from previo us experiments—including precision missions like PAMELA\, for which this specific energy range was inaccessible. The "Nadya" instrument is schedul ed for launch aboard the A-100 unified spacecraft platform (developed by t he company L5) into a circular sun-synchronous orbit with a mean altitude of 450–650 km and an inclination of approximately 98°. This orbital con figuration ensures regular passes over polar regions characterized by low geomagnetic cutoff thresholds\, as well as through the South Atlantic Anom aly—conditions essential for a comprehensive analysis of particle flux a nisotropy across various helio-geophysical environments. The spacecraft la unch is planned for the first half of 2027. The key performance characteri stics of the scientific instrumentation have been optimized to meet the st rict resource constraints of small satellite platforms: the total instrume nt mass is approximately 3 kg\, and the average power consumption during s tandard measurement operations does not exceed 15 W. The projected volume of scientific telemetry data transmitted to the ground control segment rea ches 10 GB per day\, ensuring high statistical significance for the record ed events.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/650 8/ LOCATION:Sevastopol hotel Conference Hall 1 URL:https://indico.particle.mephi.ru/event/626/contributions/6508/ END:VEVENT END:VCALENDAR