BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Electron Identification Performance of the ALICE Experiment DTSTART;VALUE=DATE-TIME:20261028T140500Z DTEND;VALUE=DATE-TIME:20261028T142000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6334@cern.ch DESCRIPTION:Speakers: Yeghishe Hambardzumyan (MIPT)\nHigh-precision measur ements of charmonium states in proton-proton collisions at the ALICE exper iment at LHC necessitate robust electron identification and background sup pression. A comprehensive analysis of electron identification performance within the ALICE experiment is presented\, utilizing Run 3 proton-proton c ollision data at $\\sqrt{s}= 13.6$ TeV. Electron identification is based o n specific ionization energy loss in the Time Projection Chamber (TPC) in conjunction with time-of-flight measurements from the TOF detector. A comp lementary method involving the matching of TPC tracks to electromagnetic c lusters in the Photon Spectrometer (PHOS) enhances the electron identifica tion. The efficiency of electron identification is evaluated using the dat a-driven tag-and-probe algorithm using $J/\\psi \\to e^+e^-$ decays. Data from the PHOS detector is used for estimation of residual hadron contamina tion of the electron sample. The reported electron ID performance is essen tial for charmonium measurement in ongoing ALICE Run 3 analyses.\n\nhttps: //indico.particle.mephi.ru/event/626/contributions/6334/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6334/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent results from Belle and Belle II DTSTART;VALUE=DATE-TIME:20261030T084500Z DTEND;VALUE=DATE-TIME:20261030T090500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6530@cern.ch DESCRIPTION:Speakers: Alexey Garmash (Budker Institute of Nuclear Physics) \nB-factories provide a unique environment to test the standard model in s earch for new physics. The Belle and Belle II experiments succeeded each o ther at KEK\, in Tsukuba\, Japan. During its lifetime\, Belle collected ab out 1 $ab^{-1}$ of data\; to date Belle II recorded 914 $fb^{-1}$ more. Th is unique data set allows us to test SM and search for new physics with un matched precision. We discuss some recent results from both experiments.\n \nhttps://indico.particle.mephi.ru/event/626/contributions/6530/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6530/ END:VEVENT BEGIN:VEVENT SUMMARY:Charge-exchange straggling and correlated A–E reconstruction for heavy-ion isotope identification in silicon detectors DTSTART;VALUE=DATE-TIME:20261030T162000Z DTEND;VALUE=DATE-TIME:20261030T163500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6376@cern.ch DESCRIPTION:Speakers: Andrei Azhakin (Faculty of Physics\, Lomonosov Mosco w State University)\nIsotope identification in multilayer silicon detector s requires joint reconstruction of mass number A and energy E. Different A –E pairs may yield nearly identical mean profiles\, while deposited-ener gy fluctuations limit isotope separation. For partially stripped ions\, st ochastic electron capture and loss alter the charge state and add charge-e xchange fluctuations\, requiring explicit modeling.\n\nWe developed a Gean t4 framework combining GLOBAL capture/loss cross sections\, Mott-corrected δ-electron production\, and secondary-electron transport in general geom etries. To our knowledge\, no existing code provides this combination at t he level of detector energy deposition. MOCADI models charge-state evoluti on and projectile energy loss in beam lines\, but not deposited energy. We also developed an N-dimensional likelihood reconstruction of A and E usin g total deposition and correlated layer profiles. Beyond xenon\, simulatio ns predict non-Gaussian\, sometimes multi-peaked ΔE distributions in thin silicon\, where charge-exchange mean free paths can match typical 300–1 000 μm layer thicknesses while ions remain partially stripped.\n\nhttps:/ /indico.particle.mephi.ru/event/626/contributions/6376/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6376/ END:VEVENT BEGIN:VEVENT SUMMARY:The reactions pd → pdππ and dd → ddππ and dibaryon reso nances DTSTART;VALUE=DATE-TIME:20261029T144500Z DTEND;VALUE=DATE-TIME:20261029T150500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6175@cern.ch DESCRIPTION:Speakers: Yuriy Uzikov (Joiny Institute for Nuclear Researches )\nThe resonance peak observed by WASA@COSY in the total cross section o f the reaction of two-pion production in the isoscalar channel of the reac tion pn → dπ0π0 [1] at invariant mass 2380 MeV with the width of 70 Me V\, is considered as one of the most realistic candidate to the dibaryon resonance. The isospin of this resonance is I=0 and spin-parity JP=3+. A similar resonance structure was observed by ANKE@COSY in the differentia l cross section of the two-pion production reaction pd → pdππ at beam energies 0.8-2.0 GeV with high transferred momentum to the deuteron at sma ll scattering angles of the final proton and deuteron [2]. The kinematic o f this reaction differ considerably from that in Ref. [1] and two final pi ons were not registered\, nevertheless in the distribution over the invari ant mass Mdππ of the final dππ system of the reaction pd → pdππ th e resonance peak was also observed at Mdππ ≈ 2.38 GeV [2]. In order to explain these data\, in Refs. [3] the two-resonance model of the reac tion pn → dπ0π0 [4] was applied by inclusion of the t-channel σ-m eson exchange between the proton and deuteron in the reaction pd → pdπ π. Later\, the reaction γ d→ dπ0π0 was studied in Ref. [5] and an indication to excitation of isoscalar dibaryon resonance D03(2380) and mo re heavier dibaryons d* with masses 2470 MeV and 2630 MeV was found. Thes e resonances \, if they do exist\, can be excited also in the reactions d d→ dd* and dd→npd* at SPD NICA collider. We estimated [6] the dif ferential cross sections of the reactions pd → pdππ and dd → dd ππ assuming excitaion of the D03(2380) dibaryon by σ- meson exchang e in t-channel and calculated distributions over the invariant mass o f the final dππ system for these reactions . \n \n[1] P. Adlarson et a l. (WASA@COSY Collab.)\, Phys. Rev. Lett. 106\, 242302 (2011). \n[2] V. I. Komarov et al. (ANKE@COSY Collab.)\, Eur. Phys. J. A (2018) 54: 206. \n[3] Yu. Uzikov\, N. Tursunbayev\, EPJ Web of Conf. 204\, 08010 (2 019). \n[4] M.N. Platonova\, V.I. Kukulin\, Phys. Rev. C 87\, 02 5202 (2013). \n[5] T.C. Jude et al.\, Phys. Lett. B 832 (2022) 137277. \n[6] Yu.N. Uzikov\, A.A.Temerbayev\, N.T. Tursunbayev\, Phys. Part. Nuc l.\, 57\, № 5 (2026) 1026.\n\nhttps://indico.particle.mephi.ru/event/626 /contributions/6175/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6175/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation Study of $\\Sigma^{0}$ Hyperons Production at the NICA- MPD Experiment DTSTART;VALUE=DATE-TIME:20261028T130500Z DTEND;VALUE=DATE-TIME:20261028T132000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6309@cern.ch DESCRIPTION:Speakers: Yulin Wang ()\nThe Multi-Purpose Detector (MPD) at t he NICA facility is designed to study heavy-ion collisions at $\\sqrt{s_{N N}}$ = 4-11 GeV\, providing access to the baryon-rich region of the QCD ph ase diagram. Measurements of strange particles and hyperons are important for studying particle production mechanisms and the properties of strongly interacting matter at high baryon density. In particular\, the $\\Sigma^{ 0}$ hyperon\, reconstructed through its electromagnetic decay $\\Sigma^{0} \\rightarrow \\gamma\\Lambda$\, provides a possibility to study hyperon p roduction as well as the reconstruction of low-energy photons in the MPD e xperiment.\n\nWe present a feasibility study of $\\Sigma^{0}$ reconstructi on in Bi+Bi collisions at $\\sqrt{s_{NN}}$ = 9.2 GeV using full MPD detect or simulations. $\\Lambda$ candidates are reconstructed through the $\\Lam bda \\rightarrow p\\pi^{-}$ decay channel\, while photons are reconstructe d using both the Photon Conversion Method (PCM) and the Electromagnetic Ca lorimeter (ECal). The reconstruction techniques and performance using PCM and ECal photons are discussed and compared. The results demonstrate the c urrent performance of $\\Sigma^{0}$ reconstruction in MPD\, providing a ba sis for further optimization and future experimental data analysis.\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6309/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6309/ END:VEVENT BEGIN:VEVENT SUMMARY:Production of light nuclei in collisions of $^{124\,136}$Xe with C sI target DTSTART;VALUE=DATE-TIME:20261028T135000Z DTEND;VALUE=DATE-TIME:20261028T140500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6301@cern.ch DESCRIPTION:Speakers: Aleksandr Svetlichnyi (INR RAS\, MIPT(NRU))\n    T he difference between the numbers of neutrons and protons in atomic nuclei defines the isospin asymmetry of nuclei. The squared relative difference between the local densities of neutrons and protons contributes to the den sity-dependent symmetry energy term in the equation of state of nuclear ma tter. In particular\, this contribution makes the nuclei with a large neut ron excess unstable and defines the parameters of neutron stars [1]. Compa rative studies of nuclear reactions induced by projectiles with similar ma ss numbers but differing neutron and proton numbers on the same target all ow for systematic investigations of isospin asymmetry effects [2]. As foun d in Ref. [2]\, the cross sections for the production of heavy isotopes ar e particularly sensitive to the isospin content of projectile nuclei.\n\n     In this work\, the Abrasion-Ablation Monte Carlo for Colliders model with pre-equilibrium clustering based on the Minimum Spanning Tree algori thm (AAMCC-MST) [3\,4] was used to study the production of light spectator fragments. In AAMCC-MST\, the Glauber Monte Carlo model [5] is used to ca lculate the numbers of participant and spectator nucleons. The latter are assumed to form spectator prefragments. In particular\, in peripheral coll isions such prefragments consist of multiple excited nuclear clusters defi ned by the MST clustering algorithm [3]. Depending on their excitation en ergy\, the clusters undergo various secondary decays simulated with de-exc itation models from the Geant4 library [6].\n\n    Fragmentation of rel ativistic nuclei can be investigated using forward detectors in the Baryon ic Matter at Nuclotron (BM@N) experiment [7] at the NICA accelerator compl ex. Specifically\, light spectator fragments with charges Z = 1–5 from t he fragmentation of 3.8A GeV $^{124}$Xe on a CsI target can be measured by the scintillation wall [8]. The potential use of a $^{136}$Xe beam is cur rently under discussion. Here\, we present a comparative study of light sp ectator fragment emission in collisions of $^{124}$Xe and $^{136}$Xe with $^{130}$Xe representing the CsI target. Production cross sections for frag ments with Z = 1–5 were calculated as a function of collision centrality . In addition\, the relative yields of spectator protons\, $^{2\,3}$H\, an d $^{3\,4}$He in the 10 % of most central collisions were calculated to p robe the isospin content of the fragmenting systems.\n\n\n#References\n1. Steiner A. W.\, Prakash M.\, Lattimer J. M.\, Ellis P. J. Isospin asymmetr y in nuclei and neutron stars // Phys. Rep. 2005. Vol. 411. P. 325.\n2. D.  Henzlova\, K.-H. Shmidt\, M.V. Richardi et al\, Experimental investig ation of the residues produced in the 136Xe + Pb and 124Xe + Pb fragmentat ion reactions at 1A GeV // Phys. Rev. C 2008. Vol. 78. P. 044616.\n3. Nepe ivoda R.\, Svetlichnyi A.\, Kozyrev N.\, et al. Pre-Equilibrium Clustering in Production of Spectator Fragments in Collisions of Relativistic Nuclei // Particles. 2022. Vol. 5. P. 40.\n4. Kozyrev N.\, Svetlichnyi A.\, Nepe ivoda R.\, et al. Peeling away neutron skin in ultracentral collisions of relativistic nuclei // Eur. Phys. J. A. 2022. Vol. 58. P. 184.\n5. Loizide s C.\, Kamin J.\, d’Enterria D. Improved Monte Carlo Glauber predictions at present and future nuclear colliders // Phys. Rev. C. 2018. Vol. 97. P . 054910.\n6. Allison J.\, Amako K.\, Apostolakis J.\, et al. Recent devel opments in Geant4 // Nucl. Instrum. Meth. A. 2016. Vol. 835. P. 186.\n7. K apishin M.\, et al. Studies of baryonic matter at the BM@N experiment (JIN R) // Nucl. Phys. A. 2019. Vol. 982. P. 967.\n8. Volkov V.\, Golubeva M.\, Guber F.\, et al. Performance of the scintillation wall in the BM@N exper iment // Nucl. Instrum. Meth. A. 2025. Vol. 1077. P. 170529.\n\nhttps://in dico.particle.mephi.ru/event/626/contributions/6301/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6301/ END:VEVENT BEGIN:VEVENT SUMMARY:Sensitivity of νGeN and RED-100 experiments to reactor-produced millicharged particles DTSTART;VALUE=DATE-TIME:20261030T071500Z DTEND;VALUE=DATE-TIME:20261030T073000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6281@cern.ch DESCRIPTION:Speakers: Robert Folkenberg Siro (Moscow Institute of Physics and Technology)\nSome extensions of the Standard Model (SM) predict the ex istence of fermions with an electric charge much smaller than that of the elementary charge. Such particles\, known as millicharged particles (MCP)\ , may be produced in nuclear reactors from the interactions between gamma- rays and the electrons of reactor materials. In this work\, the MCP flux a nd energy deposition distributions at Kalinin Nuclear Power Plant (KNPP) a re presented. The considered experiments\, RED-100 (with a two-phase emiss ion detector filled with either xenon or argon) and νGeN (with a solid-st ate germanium detector) were in exposition at KNPP. The proximity of these experiments to high intensity flux of reactor gamma quanta allows for the probe of the MCPs by comparing reactor-ON (active reactor) and OFF (react or shutdown) data. The expected count rates of MCP interaction with electr ons of the sensitive volumes of the aforementioned detectors are further c ombined with measured background levels to asses the sensitivity of the ex periments to hypothetical reactor-produced MCPs.\n\nhttps://indico.particl e.mephi.ru/event/626/contributions/6281/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6281/ END:VEVENT BEGIN:VEVENT SUMMARY:Developments of Geant4 physics models and user applications DTSTART;VALUE=DATE-TIME:20261030T140000Z DTEND;VALUE=DATE-TIME:20261030T142000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6344@cern.ch DESCRIPTION:Speakers: Vladimir Ivantchenko (Tomsk State Research Universit y)\nWe report results of developments carried out in the framework of proj ect of Tomsk State Research University supported by the Government of Russ ian Federation.\nThe Geant4 toolkit is widely used in HEP and in other app lication domains including space science and radiation medicine. For the G eant4 electro-magnetic physics two new processes we provided: muon pair pr oduction by relativistic muons\; positron annihilation into 2 or 3 gamma q uanta considering radiative corrections and formation of a positronium sta te at rest. The last process is important for simulation of PET tomography \, in the new model a linear polarization of photons and Doppler broading are implemented. For prediction of radiation effects in space and for stud y of radiation therapy we contributed to Geant4-DNA project devoting model s for protons and ions interaction with liquid water and comparisons of th ese results with experimental data.\n\nFor hadronic physics of Geant4 a ge neral method to compute hadronic cross sections was developed based on Gla uber theory with Gribov corrections and on experimental data. Provided cro ss sections are applicable to any energy of any hadron. We study and impro ve low-energy cross sections of low energy neutrons starting from kinetic energy 1 eV. We improved Geant4 pre-compound model and de-excitation modul e. Results of validation versus experimental data will be presented.\n\nSe veral specific applications of Geant4 were developed. A possibility of usi ng an accelerator-driven system of the Prometheus proton therapy complex t o obtain medical isotopes was studied. An accelerator-driven system with u ranium target was simulated in Geant4 software.\n\nWe have developed a new portal GEANT4RU for education purpose\, and for use in researches in vari ous application domains. In this work we present this software for the fir st time.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6344/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6344/ END:VEVENT BEGIN:VEVENT SUMMARY:Light yield correction in the 3D-segmented SuperFGD neutrino detec tor DTSTART;VALUE=DATE-TIME:20261030T152000Z DTEND;VALUE=DATE-TIME:20261030T153500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6343@cern.ch DESCRIPTION:Speakers: Viktor Prutyanov (INR RAS)\nSuperFGD [1] is a highly segmented scintillator neutrino target with a three-dimensional structure comprising nearly two million scintillator cubes\, each 1 cm on a side. I t is currently operating as part of the upgraded ND280 near detector [2] a nd is collecting data from the T2K neutrino beam [3]. Scintillation photon s produced when a charged particle passes through a scintillator cube are captured by three mutually orthogonal Kuraray Y-11(200) wavelength-shiftin g (WLS) fibers and subsequently detected by Hamamatsu S13360-1325PE Multi- Pixel Photon Counters (MPPCs).\n\nTo ensure a uniform detector response\, the signal correction must account for attenuation along the WLS fibers as a function of the distance from the scintillator cube to the MPPC\, as we ll as for the light-yield (LY) response of individual cubes. For the horiz ontal X- and Z-oriented fibers\, this distance dependence is determined us ing cosmic-muon data. Since cosmic muons predominantly traverse SuperFGD a long directions close to the vertical axis\, their projections onto the ho rizontal XZ plane are too short to provide sufficient information for cali brating the vertical Y-oriented fibers. Therefore\, muons produced in inte ractions of T2K beam neutrinos are used for this purpose. The Y-fiber cali bration sample consists predominantly of sand muons produced in neutrino i nteractions in the rock surrounding the detector. Muon candidates are sele cted using TPC and HA-TPC tracking and particle-identification information . The selection requires a high-quality track that crosses SuperFGD and or iginates outside the detector\; the muon momentum is reconstructed using t he TPC. Muons and stopping protons are also employed to estimate the linea rity of the relationship between the cube LY and the track chord length wi thin the cube.\n\nThis work is supported by Russian Science Foundation gra nt No. 26-72-00042.\n\n[1] S. Abe et al. (T2K Collab.). The super fine-gra ined detector for the T2K neutrino oscillation experiment\, Nucl. Instrum. Meth. A 1092 (2026) 171882.\n\n[2] N. Skrobova. The Upgrade of the T2K Ne ar Detector\, Springer Proc. Phys. 425 (2025) 49-53.\n\n[3] K. Abe et al. (T2K Collab.). Constraint on the matter-antimatter symmetry-violating phas e in neutrino oscillations\, Nature 580 (2020) 339–344.\n\nhttps://indic o.particle.mephi.ru/event/626/contributions/6343/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6343/ END:VEVENT BEGIN:VEVENT SUMMARY:Evolution of polarization correlations of annihilation photons dur ing Compton scattering DTSTART;VALUE=DATE-TIME:20261030T143500Z DTEND;VALUE=DATE-TIME:20261030T145000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6341@cern.ch DESCRIPTION:Speakers: Sultan Musin (INR RAS)\nWe present the final results of our experimental program on the evolution of polarization correlations of annihilation photons when one of the photons undergoes Compton scatter ing. The correlation measure of the photon pair is extracted from the meas ured visibility of azimuthal angular correlations by factoring out the ana lyzing power of the Compton polarimeters. In our previous work\, the measu rements covered forward scattering angles up to 35° and backscattering ne ar 180°. In this work\, we extend the range to include large-angle scatte ring\, covering the full range of Compton scattering angles. The experimen tal results are compared with the analytical prediction based on quantum f ield theory and with the result of Monte Carlo simulations of classically correlated photons. All descriptions are found to be in agreement with the data over the full range of scattering angles. The behaviour of polarizat ion correlations during scattering is identical to that of classical corre lations up to a constant factor of two\, which is consistent with local qu antum field theory and does not require "spooky action at a distance." The se results confirm the latest theoretical predictions and resolve the "dec oherence puzzle" reported earlier.\n\nhttps://indico.particle.mephi.ru/eve nt/626/contributions/6341/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6341/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance Study of the BM@N Forward Detectors in Xe+CsI Collisio ns at 3.8A GeV DTSTART;VALUE=DATE-TIME:20261030T163500Z DTEND;VALUE=DATE-TIME:20261030T165000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6340@cern.ch DESCRIPTION:Speakers: Nikolay Karpushkin (INR RAS)\nAn experimental study of xenon-cesium iodide (Xe+CsI) collisions at a beam kinetic energy of 3.8 A GeV was performed at the BM@N experiment. The BM@N setup is equipped wit h forward detectors\, including the Forward Hadron Calorimeter (FHCal) and the Forward Quartz Hodoscope (FQH)\, which provide information on the geo metry of nuclear collisions. \nIn this work\, the performance of the forw ard detector system is studied by comparing the measured detector response with predictions obtained using the DCM–QGSM–SMM and UrQMD–SMM mode ls. The comparison focuses on the response of the FHCal and FQH and their correlation in experimental and simulated events.\n\nhttps://indico.partic le.mephi.ru/event/626/contributions/6340/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6340/ END:VEVENT BEGIN:VEVENT SUMMARY:Preliminary calibration of SiPMs for the NICA-MPD electromagnetic calorimeter DTSTART;VALUE=DATE-TIME:20261030T153500Z DTEND;VALUE=DATE-TIME:20261030T155000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6339@cern.ch DESCRIPTION:Speakers: M. Bhattacharjee (LHEP\, JINR)\nThe electromagnetic calorimeter (ECAL) of the Multi-Purpose Detector (MPD) at NICA uses silico n photomultipliers (SiPMs) to read out the 38\,400 cells. The report prese nts the LED calibration procedure of the SiPMs\, the distribution of the r equired operating voltages\, and the assessment of calibration quality acr oss the tested board population. The application of the generated configur ation files in half-sectors for cosmic-muon measurements are also discusse d.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6339/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6339/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the ECal/MPD calorimeter calibration with cosmic ray muo ns DTSTART;VALUE=DATE-TIME:20261030T155000Z DTEND;VALUE=DATE-TIME:20261030T160500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6338@cern.ch DESCRIPTION:Speakers: Maxim Martemianov (NRC "Kurchatov Institute")\nThe c ylindrical electromagnetic calorimeter (ECal) is one of the key subsystem of the MPD detector having the main goal to search a quark-gluon plasma [1 ]. It consists of 50 half-sectors comprising 768 “shashlik”- type cell s (towers). The towers are truncated pyramids of 64 different types and va rying orientations. The calibration of individual half-sectors has been co mpleted now\, which is based on determining the peak position from the ene rgy deposition of cosmic muon tracks. In the fully assembled half-sectors all towers are arranged at different orientation relative to the vertical direction\, so the calibration coefficients slightly depend on the tower's position [2]. This work presents the results of all half-sector calibrati ons with cosmic ray muons at test bench\, normalization based on simulatio n results using comic-ray muon generator [3] and database structure.\n\n[1 ] V. Abgaryan (MPD Collaboration)\, Eur.Phys.J.A 58\, 140 (2022).\n[2] M. A. Martemianov et al.\, Phys.Atom.Nucl. 88\, 96 (2025).\n[3] D. Pagano et al.\, Nucl.Instrum.Meth. A 1014\, 165732 (2021).\n\nhttps://indico.particl e.mephi.ru/event/626/contributions/6338/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6338/ END:VEVENT BEGIN:VEVENT SUMMARY:Intrinsic energy resolution of the liquid argon scintillation sign al DTSTART;VALUE=DATE-TIME:20261030T150500Z DTEND;VALUE=DATE-TIME:20261030T152000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6335@cern.ch DESCRIPTION:Speakers: Olga Lychagina (JINR)\nLiquid argon (LAr) detectors are widely used in modern astroparticle and neutrino physics\, with experi ments such as DarkSide-20k\, DEAP-3600\, and DUNE relying on their scintil lation response. A precise characterisation of the energy resolution is es sential for optimising the sensitivity of these experiments to rare events \, improving neutrino energy reconstruction\, and lowering detection thres holds.\n\nIn organic and inorganic scintillators\, a contribution to the e nergy resolution is observed that cannot be described by photoelectron sta tistics\, PMT response\, or light collection non-uniformities\, and is ref erred to as the intrinsic resolution of the scintillation medium. In this work\, we test whether a similar contribution is present in the energy res olution of the liquid argon scintillation signal. Using a phenomenological model that separates independent fluctuation sources\, we extract an effe ctive parameter that characterises the intrinsic resolution at 1 MeV from three independent datasets. Afterpulses falling within the PMT signal wind ow are not accounted for in the statistical term extracted from PMT calibr ations performed in a short window\, and must therefore be added explicitl y. Together with the fluctuations due to photon re-emission at the TPB wav elength shifter\, these contributions fully account for the extracted para meter: after their subtraction\, effective parameter is compatible with ze ro\, and no additional intrinsic component is needed.\n\nThis result holds consistently across all three datasets. It indicates that the measured en ergy resolution of LAr scintillation detectors can be described by these c ontributions alone\, without invoking an intrinsic resolution of the scint illation medium itself\, in contrast to what is observed in organic and in organic scintillators. The fluctuations due to photon re-emission at the T PB wavelength shifter may\, in turn\, provide a key to understanding the l ine-broadening mechanism observed in organic scintillators. These findings have direct implications for the interpretation of the energy resolution in large-scale LAr detectors with light yields of several thousand p.e./Me V.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6335/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6335/ END:VEVENT BEGIN:VEVENT SUMMARY:GEANT4 simulation of a pixelized GaAs transition radiation detecto r. DTSTART;VALUE=DATE-TIME:20261030T142000Z DTEND;VALUE=DATE-TIME:20261030T143500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6337@cern.ch DESCRIPTION:Speakers: Vladimir Tikhomirov (P.N.Lebedev Physical Institute\ , Russian Academy of Sciences)\nTest experiments with several prototypes o f a transition radiation detector\nwere carried out in accelerator beams. The detector is based on a GaAs crystal\ncoupled to a pixel chip with a pi xel size of 55 μm. Such a detector makes it\npossible to efficiently dist inguish the signals produced by the ionizing\nparticle from those produced by transition radiation photons\, thereby\nsignificantly improving the de tector’s rejection capability for particle\nidentification based on thei r different masses.\n A GEANT4-based simulation program was developed for detailed modeling of\nthe detector. The program simulates in detail the pr imary processes of\ntransition radiation photon production and absorption\ , the ionization\nenergy losses of beam particles\, as well as the detecto r response\, including\ncharge collection processes in the GaAs volume and signal formation in\nthe pixel chip.\n The simulation results are present ed and compared with the experimental data.\n\nhttps://indico.particle.mep hi.ru/event/626/contributions/6337/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6337/ END:VEVENT BEGIN:VEVENT SUMMARY:Grid-based operator-splitting solvers for radiative transfer with sharply peaked sources DTSTART;VALUE=DATE-TIME:20261030T145000Z DTEND;VALUE=DATE-TIME:20261030T150500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6342@cern.ch DESCRIPTION:Speakers: Grigory Vorobyev (Lomonosov MSU)\nDeterministic solu tion of the radiative transfer equation (RTE) on a fixed grid is a possibl e alternative to Monte Carlo photon tracking for light propagation in wate r and ice\, for example in neutrino telescopes like BaikalGVD. However\, t he relevant sources\, Cherenkov light from charged-particle tracks\, are s harply localized in both space and direction. We present an implementation of a second-order Strang-split RTE solver in 3D space + 2D direction. It uses a spherical t-design angular grid ($10^2 - 10^4$ directions)\, a coll ision step that is exact in spherical-harmonic space for a Henyey-Greenste in phase function\, and a semi-Lagrangian cubic-spline streaming step that conserves energy to $10^{-7} - 10^{-15}$. We study three obstacles to pra ctical use: Ray effect\, sharp sources (Gibbs oscillations)\, memory\\spee d cost. We discuss mitigation through uncollided-flux splitting and hybrid Monte Carlo–grid schemes. The work is ongoing.\n\nhttps://indico.partic le.mephi.ru/event/626/contributions/6342/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6342/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance of the FHCal@MPD DTSTART;VALUE=DATE-TIME:20261030T160500Z DTEND;VALUE=DATE-TIME:20261030T162000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6336@cern.ch DESCRIPTION:Speakers: Dmitry Finogeev ()\nThe Multi-Purpose Detector (MPD) experiment at the NICA collider is designed to investigate the QCD phase diagram at high net baryon chemical potentials and moderate temperatures. The Forward Hadron Calorimeter (FHCal) is a key sub-detector dedicated to measuring the energy and spatial distributions of spectator nucleons\, pro viding essential information on collision geometry\, such as the reaction plane and centrality. The FHCal comprises two symmetric arms\, each contai ning 44 modules with a lead–scintillator sandwich structure segmented in to 7 longitudinal sections. To accurately determine the energy deposited b y spectators\, precise calibration of each FHCal module is required.\nThe FHCal detector layout and assembly status will be presented. The methods a nd experimental results for FHCal detector calibration\, trigger tuning\, and stability tests using cosmic rays will be reported. Progress in the ce ntrality determination procedure using physics simulations will be discuss ed.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6336/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6336/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation-Based Feasibility Study of Isospin Effects with the HGN D at BM@N DTSTART;VALUE=DATE-TIME:20261028T133500Z DTEND;VALUE=DATE-TIME:20261028T135000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6331@cern.ch DESCRIPTION:Speakers: Arseniy Shabanov ()\nThe Baryonic Matter at Nuclotro n (BM@N) is a fixed-target experiment (JINR\, Dubna) aimed at studying hea vy ion collisions at beam energies up to 4 A GeV. To extend its capabiliti es\, the Highly Granular Neutron Detector (HGND) [1] has been developed. T his detector will enable unique measurements of neutrons in the kinetic en ergy range of 0.3–4.0 GeV. These measurements will make it possible to e xplore the isospin term of the equation of state (EOS) of baryonic matter. The HGND comprises two arms\, each consisting of 8 layers of plastic scin tillator with copper absorber plates in between. Each scintillation layer is assembled from an 11×11 matrix of individual cells\, providing high sp atial granularity and a time resolution of ~150 ps.\n\nAs an observable se nsitive to the isospin-dependent term of the EOS\, the ratio of neutron an d proton spectra was proposed [2]. To determine the experimental sensitivi ty\, Monte Carlo simulations of Xe+Cs collisions were performed. The simul ations were done using the SMASH [3] model at a beam kinetic energy of 2.5 A GeV. A set of isospin symmetry potentials was used to study the differe nce in the spectra. The proton spectrum reconstruction procedure is alread y developed [4]. In this work\, the neutron spectrum reconstruction proced ure from HGND data is discussed. Special attention is paid to the neutron spectrum reconstruction using a plastic absorber for background removal.\n \nReferences:\n1. S. Morozov et al.\, Nucl. Instrum. Meth. A 1072\, 170152 (2025)\n2. Bao-An Li\, C. M. Ko\, Zhong-zhou Ren\, Phys. Rev. Lett. 78 (1 997)\, 1644\n3. https://github.com/smash-transport/smash\n4. BM@N Collabor ation • S. Afanasiev (Dubna\, JINR) et al.\, JHEP 08 (2025)\, 095\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6331/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6331/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the Strangeness Production at the NICA Complex DTSTART;VALUE=DATE-TIME:20261028T125000Z DTEND;VALUE=DATE-TIME:20261028T130500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6330@cern.ch DESCRIPTION:Speakers: Dilyana Suvarieva ()\nStudy of the strange particle production in nuclear collisions is one\nof the most important items of th e physics program of the BM@N and MPD\nexperiments at the NICA complex.\n\ n The BM@N Collaboration currently analyzes experimental data obtained\nin interactions of Xe beam with CsI and Sn targets at different energies.\nA t the same time\, recent MPD experiment simulations showed its ability to\ nrun in the fixed-target mode at similar energies as BM@N. Some results of \nboth experiments on strangeness production study will be presented.\n\nh ttps://indico.particle.mephi.ru/event/626/contributions/6330/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6330/ END:VEVENT BEGIN:VEVENT SUMMARY:Unfolding methods for reconstructing the spectrum of spectator neu trons obtained by the HGND prototype in the BM@N experiment DTSTART;VALUE=DATE-TIME:20261028T132000Z DTEND;VALUE=DATE-TIME:20261028T133500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6329@cern.ch DESCRIPTION:Speakers: Aleksandr Zubankov (INR RAS)\nThe development of a H ighly Granular Time-of-Flight Neutron Detector (HGND) for measuring neutro n yields and flow in the 0.3-4 GeV kinetic energy range in nuclear collisi ons at the BM@N experiment is almost finished. To validate the concept of the full-scale HGND\, a compact HGND prototype was tested in 3.8A GeV 124X e collisions with a CsI target in the BM@N experiment in 2022. The prototy pe was positioned at an angle of 0 degrees to the undeflected beam axis in order to measure the yields of spectator neutrons resulting from hadronic interactions of nuclei\, as well as the yields of neutrons resulting from electromagnetic dissociation (EMD) of projectile nuclei [2].\n\nDespite t he high neutron detection efficiency and relatively good time resolution o f the HGND prototype of approximately 270 ps\, it is insufficient for meas uring high-energy neutrons. The measured neutron kinetic energy spectra\, reconstructed using the time-of-flight method\, are significantly smeared due to the contribution of the time resolution. In order to restore the tr ue neutron kinetic energy spectrum from the distorted reconstructed spectr um\, an unfolding procedure was used [3]. This method of spectrum reconstr uction uses the measured kinetic energy spectrum as input data\, as well a s the detector response matrix and background estimations obtained through the detector response simulation in the complete geometry of the BM@N set up using the DCM-QGSM-SMM and UrQMD-AMC models as event generators. An int ercomparison of the various unfolding methods implemented in the RooUnfold framework for reconstructing the neutron spectrum was conducted.\n\nThis approach allows the measurement of double-differential inclusive cross sec tions of forward neutron emission as a function of rapidity and solid angl e even with limited time resolution. In order to validate the approach\, m easurements of neutrons from EMD were performed\, as these neutrons are ch aracterised by a very narrow energy distribution\, centred around the proj ectile beam energy [4].\n\nReferences\n\n 1. S. Morozov et al.\, Nucl. Ins trum. Meth. A 1072\, 170152 (2025).\n 2. A. Zubankov et al.\, Nucl. Sci. T ech. 36\, 226 (2025).\n 3. L. Brenner et al.\, Int. J. Mod. Phys. A\, 35 ( 24)\, 2050145 (2020).\n 4. I.A. Pshenichnov et al.\, Int. J. Mod. Phys. E 33\, 2441007 (2024).\n\nhttps://indico.particle.mephi.ru/event/626/contrib utions/6329/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6329/ END:VEVENT BEGIN:VEVENT SUMMARY:Hard proton knockout from 12C in inverse kinematics: quasi-elastic scattering and short-range correlations DTSTART;VALUE=DATE-TIME:20261029T132000Z DTEND;VALUE=DATE-TIME:20261029T133500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6325@cern.ch DESCRIPTION:Speakers: Stepan Cherepanov ()\nThe second Short-Range Correla tions (SRC) experiment at JINR\, performed in 2022\, used a 44.8 GeV/c $ ^{12}C$ beam incident on a liquid-hydrogen target to study hard proton kno ckout from $^{12}C$ in inverse kinematics. The reaction products were dete cted with a modified BM@N spectrometer. The experimental setup was optimiz ed for proton–proton scattering near $90^{\\circ}$ in the center-of-mass frame\, corresponding to a squared four-momentum transfer of approximatel y 2.5 $GeV/c^2$.\n\n\nUnder these kinematic conditions\, the cross section for the $^{12}C(p\,2p)^{11}B$ reaction was measured for the first time. T he result was compared with single-particle distorted-wave impulse-approxi mation calculations incorporating well-constrained initial- and final-stat e interactions within the Glauber framework. The extracted spectroscopic r eduction factor\, R_s=0.96±0.01(stat.) ±0.05(syst.)\, is consistent with results from high- $Q^2$ A(e\,e'p) measurements. It is\, however\, signi ficantly larger than the reduced single-particle strengths\, R_s=0.6\, typ ically obtained from low-energy quasi-elastic electron- and hadron-induced reactions. This comparison supports a scale-dependent picture of the obse rved single-particle strength in nuclei.\n\n\nThe ongoing analysis of even ts with an identified $^{10}B$ residual nucleus searches for exclusive sig natures of scattering from short-range-correlated nucleon pairs in $^{12}C $. The event selection is guided by detailed simulations of the SRC signal and relevant background processes. The talk will present the measured qua si-elastic cross section and spectroscopic strength\, discuss the observed exclusive event topologies\, and report the current status of the SRC-pai r knockout analysis.\n\nhttps://indico.particle.mephi.ru/event/626/contrib utions/6325/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6325/ END:VEVENT BEGIN:VEVENT SUMMARY:Status report on the SPD Beam-Beam Counter (BBC) prototype for ini tial SPD runs at NICA DTSTART;VALUE=DATE-TIME:20261029T150500Z DTEND;VALUE=DATE-TIME:20261029T152000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6321@cern.ch DESCRIPTION:Speakers: Aleksey Tishevsky ()\nThis study addresses the desig n and prototyping of the Beam-Beam Counter (BBC) subsystem for the SPD exp eriment. The proposed prototype features a modular structure of 16 sectors \, with a total number of tiles equal to 128\, as well as a dedicated conf iguration for integration into the Phase 0 of SPD experimental setup. To v alidate its performance\, two reduced sectors were tested in fixed-target mode using 124Xe+Ag collisions at 2.2 GeV/nucleon on the internal target s tation (ITS) of the Nuclotron. The full DAQ chain based on the FERS5200 sy stem was successfully validated under operational beam conditions both in triggered and triggerless modes. These results establish a critical benchm ark for the commissioning of the proposed prototype and are directly relev ant to upcoming Phase 0 measurements of the SPD/NICA project.\n\nhttps://i ndico.particle.mephi.ru/event/626/contributions/6321/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6321/ END:VEVENT BEGIN:VEVENT SUMMARY:Quasi-Elastic $dd$ Processes at the SPD as a Probe of Spin Depende nt Nucleon Scattering DTSTART;VALUE=DATE-TIME:20261029T142500Z DTEND;VALUE=DATE-TIME:20261029T144500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6319@cern.ch DESCRIPTION:Speakers: Amaresh Datta (JINR)\nInterpretation of the spin obs ervables in nuclear collisions data require spin dependent nucleon scatter ing ($pp$ and $pn$) amplitudes. These quantities can be extracted from the asymmetries in the polarized $pd$ collisions. At the SPD\, although the a symmetric $pd$ collisions are unlikely\, the desired quantities can still be accessed via the quasi-elastic scattering $dd \\rightarrow npd$ from th e collisions of polarized deuteron beams. It has been proven [1] that the asymmetries measured from polarized $dd$ process\, under the S-wave Impuls e Approximation\, are directly related to the relevant counterparts from t he desired $pd$ process. This work used an event generator based on unpola rized Glauber cross-sections and Geant4 detector simulation to study the f easibility and statistical accuracy of measurements of the relevant vector and tensor polarized asymmetries like $A_y\, A_{yy}\, C_{y\,y}\, C_{yy\,y }$ at the SPD during the first stage of operations.\n\n[1] Y. N. Uzikov\, Phys. Part. Nucl. Lett. 22\, no.6\, 1392-1397 (2025)\n\nhttps://indico.par ticle.mephi.ru/event/626/contributions/6319/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6319/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the tensor polarization of a deuterium gas target at VEPP-3 DTSTART;VALUE=DATE-TIME:20261029T135000Z DTEND;VALUE=DATE-TIME:20261029T141000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6326@cern.ch DESCRIPTION:Speakers: Yuri Shestakov (Budker Institute of Nuclear Physics) \nThe experiment on photodisintegration of tensor polarized deuteron is in progress. It is carried out at VEPP-3 storage ring using the internal pol arized gas target technique. The component T20 of the tensor analyzing pow er is obtained by measuring the target polarization asymmetry in the photo n energy range 400–640 MeV. The energy of photons is defined by the syst em that tags nearly real photons developed at the Budker Institute of Nucl ear Physics (BINP).\n\nWe discuss the results of measuring the tensor pola rization of a deuterium gas target during an experiment at the VEPP-3.\n\n https://indico.particle.mephi.ru/event/626/contributions/6326/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6326/ END:VEVENT BEGIN:VEVENT SUMMARY:Spin effects in the reaction np→∆–∆++ at intermediate ene rgies DTSTART;VALUE=DATE-TIME:20261029T133500Z DTEND;VALUE=DATE-TIME:20261029T135000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6324@cern.ch DESCRIPTION:Speakers: Alexander Jerusalimov (Joint Institute for Nuclear R esearch)\nThe reaction np → Δ-Δ ++ was studied at incident neutron mom enta P0 = 3.83 and 5.20 GeV/c. The reaction cross‑sections were calculat ed. It has been shown that to describe the spin density matrix [ρij]\, it is necessary to take into account the ρ‑meson exchange diagram. The ob tained results are compared with data from other experiments.\n\nhttps://i ndico.particle.mephi.ru/event/626/contributions/6324/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6324/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance study of the Beam-Beam Counters (BBC) for the dd - sca ttering at the Spin Physics Detector (SPD) DTSTART;VALUE=DATE-TIME:20261029T152000Z DTEND;VALUE=DATE-TIME:20261029T153500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6323@cern.ch DESCRIPTION:Speakers: Arkadiy Terekhin (JINR)\nA simulation of the perform ance of the SPD BBC detectors for dd collisions at energies up to √s_NN = 13.5 GeV is presented. The results are compared for the following event generators/models: Geant4 FTF\, PYTHIA 8.3\, UrQMD\, and DCM. Contribution s from both elastic and inelastic processes are considered\, and the possi bility of selecting dd – elastic and dp – quasi-elastic scattering eve nts using the Beam-Beam Counters is discussed.\n\nhttps://indico.particle. mephi.ru/event/626/contributions/6323/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6323/ END:VEVENT BEGIN:VEVENT SUMMARY:Dependence of the angular coefficients of J/ψ meson on the transv erse momentum in pp collisions $\\sqrt{s_{NN}} = 27$ GeV using the Pythia generator DTSTART;VALUE=DATE-TIME:20261029T153500Z DTEND;VALUE=DATE-TIME:20261029T155000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6322@cern.ch DESCRIPTION:Speakers: Mikhail Bykovskii (National Research Nuclear Univers ity MEPhI)\nThe angular distributions of Drell-Yan lepton pairs allow to d etermine precisely the dynamics of vector boson production in quantum chro modynamics. The dependence of the angular coefficients on the transverse m omentum of the $J/\\psi$ meson was obtained at the energy of the second st age of the SPD experiment using the Pythia generator. The $J/\\psi$ mesons produced in $pp$ collisions at $\\sqrt{s_{NN}} = 27$ GeV and decaying in to a pair of muons were used in the analysis. Machine learning (ML) method s were applied for the selection of decay muons.\n\nhttps://indico.particl e.mephi.ru/event/626/contributions/6322/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6322/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the strength and adiabatic passage of an integer resonanc e γG=3 using Nuclotron internal beam polarimeter DTSTART;VALUE=DATE-TIME:20261029T141000Z DTEND;VALUE=DATE-TIME:20261029T142500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6320@cern.ch DESCRIPTION:Speakers: Ivan Volkov (LHEP JINR)\nSpin resonances in an accel erator can significantly affect the polarization of the particle beam duri ng the acceleration cycle. To monitor the evolution of polarization and to understand the acceleration dynamics in real time\, a reliable polarimete r is essential. DSS polarimeter at the Nuclotron Internal Target Station i s a suitable instrumentation for this purpose. Its performance and efficie ncy were evaluated for $pp$-elastic scattering through comprehensive Monte -Carlo simulations using the Pluto event generator in the vicinity of the integer resonance $\\gamma \\text{G} = 3$. The results confirm that the ex isting polarimeter can provide valuable diagnostic information with accept able efficiency over a significant energy range of about 100 MeV.\n\nhttps ://indico.particle.mephi.ru/event/626/contributions/6320/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6320/ END:VEVENT BEGIN:VEVENT SUMMARY:Cross-section measurement and dynamics study of the process $e^{+} e^{-} \\to K^0_SK^{\\pm}\\pi^{\\mp}$ with the CMD-3 detector at VEPP-2000 collider DTSTART;VALUE=DATE-TIME:20261030T095000Z DTEND;VALUE=DATE-TIME:20261030T100500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6311@cern.ch DESCRIPTION:Speakers: Peter Lukin (Budker Institute of Nuclear Physics)\nT he process $e^{+}e^{-}\\to K^{0}_{S}K^{\\pm}\\pi^{\\mp}$ is important for the various physics problems. The cross section is contributing to hadroni c part to the vacuum polarization in measurement of (g-2)/2 of muon. Dynam ics of the process is interesting but poorely studied. And at last analysi ng this final state one can determine the parameters of the of orbital an d radial excitations of light vector meson.\nThe CMD-3 detector at VEPP-20 00 collider is now only place where it is possible to investigate these is sues with high precision in energy range 1.3 - 2.0 GeV center-of-mass ener gy. \nIn the talk we report the preliminary results on cross-section mea surement and dynamics study for the process $e^{+}e^{-}\\to K^{0}_{S}K^{\\ pm}\\pi^{\\mp}$ in c.m. energy range 1.3 - 2.0 GeV\n\nhttps://indico.parti cle.mephi.ru/event/626/contributions/6311/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6311/ END:VEVENT BEGIN:VEVENT SUMMARY:Multiparticle correlations in pp-collisions at √s = 13 TeV DTSTART;VALUE=DATE-TIME:20261030T090500Z DTEND;VALUE=DATE-TIME:20261030T092000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6312@cern.ch DESCRIPTION:Speakers: Artashes Chinaryan (JINR & MSU)\nWe present the resu lts of the analysis of multiparticle correlations with the factorial momen t method. This method consists in plotting the dependence of normalized fa ctorial moments of multiplicity distribution in the intervals of a dynamic al variable on the size of these intervals and enables one to exclude stat istical effects related to the finite particle multiplicity in events.\n \ nMonte-Carlo generated events with the Drell-Yan dimuon + jets production process in proton-proton collisions at the center-of-mass energy of 13 TeV are used in this work. We present the calculated numerical values of norm alized factorial moments of multiplicity distribution in a selected pseudo rapidity interval and demonstrate the dependencies of these values on the parameters of theoretical calculations. Each dependence is normalized to a n integrated luminosity of 41.55 fb$^{-1}$\, which corresponds to the 2017 data taking year at the LHC.\n\nhttps://indico.particle.mephi.ru/event/62 6/contributions/6312/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6312/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of Omega_b baryon decays using Run-3 data from the CMS exper iment at the LHC DTSTART;VALUE=DATE-TIME:20261030T092000Z DTEND;VALUE=DATE-TIME:20261030T093500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6313@cern.ch DESCRIPTION:Speakers: Nikita Kozlov (Mephi)\nData collected by the CMS exp eriment at the Large Hadron Collider have been analyzed to study the decay s of the $\\Omega_b^-$ baryon. More than 300 $\\Omega_b^- \\to \\Omega^- J /\\psi$ decay events were reconstructed using proton-proton collision data recorded during Run 2(2016-2018) and Run 3(2022-2026) at center-of-mass e nergies of $\\sqrt{s} = 13$ TeV and $\\sqrt{s} = 13.6$ TeV\, with integrat ed luminosities of 140 $fb^{-1}$ and 309.5 $fb^{-1}$\, respectively. For t he first time\, a signal corresponding to the new decay channel $\\Omega_b ^-\\to \\Omega^- \\psi(2S)$ has been observed\, and its branching ratio re lative to the well-established $\\Omega_b^-\\to \\Omega^- J/\\psi$ decay h as been measured.\n\nhttps://indico.particle.mephi.ru/event/626/contributi ons/6313/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6313/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent results on the studies of the $e^+e^-$ annihilation into ha drons with the SND detector at VEPP-2000 collider DTSTART;VALUE=DATE-TIME:20261030T093500Z DTEND;VALUE=DATE-TIME:20261030T095000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6314@cern.ch DESCRIPTION:Speakers: Andrey Kupich (BINP)\nOur studies are based on the 1 fb$^{-1}$ data\, acquired by the SND detector with $e^+e^-$-collisions at VEPP-2000 in the $\\sqrt{s}$=0.3–2 GeV energy range. We present the res ults of high precision measurements of the $e^+e^-\\to\\pi^+\\pi^-$\nand $ e^+e^-\\to\\pi^+\\pi^-\\pi^0$\ncross sections and their implications to th e calculation of the Hadronic Contribution to the Muon (g-2). Also we repo rt the results of the analysis of the $e^+e^-\\to\\pi^0\\gamma$ and $e^+e^ -\\to\\eta\\gamma$ radiative\nprocesses\nnear mass of the $\\phi$-meson\, the study of the cross sections of $e^+e^-\\to n \\bar{n}$\nand $e^+e^-\\t o\\omega\\eta\\pi^0\\pi^0$\nprocesses\, the dalitz analysis of the $e^+e^- \\to\\pi^+\\pi^-\\pi^0$ process at\nthe energy range $\\sqrt{s}$=1.05–2 GeV and the measurement\nof the inclusive hadronic cross section for the p rocesses with charged particles in the final state at 1.8 GeV \n\nhttps:// indico.particle.mephi.ru/event/626/contributions/6314/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6314/ END:VEVENT BEGIN:VEVENT SUMMARY:An amplitude analysis of $\\psi(3686)$ radiative decays into the $ \\pi^0\\pi^0$ system DTSTART;VALUE=DATE-TIME:20261030T100500Z DTEND;VALUE=DATE-TIME:20261030T102000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6315@cern.ch DESCRIPTION:Speakers: Prokhor Egorov (JINR)\nThe search for glueballs – colorless bound states of gluons – is one of the most important tasks wi thin the modern QCD. While parameters of glueballs are predicted under a w ide range of models\, their experimental observation is extremely difficul t due to the mixing with the conventional mesons. Nevertheless\, a lot of progress has been achieved in the last years. Glueballs are predicted to b e abundantly produced in glue-rich processes\, such as charmonia decays. I n this talk we present results of amplitude analysis of $\\psi(3686)$ radi ative decays into the $\\pi^0\\pi^0$ system. The model-independent descrip tion allows to combine the obtained results with other related data in the development of phenomenological models.\n\nhttps://indico.particle.mephi. ru/event/626/contributions/6315/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6315/ END:VEVENT BEGIN:VEVENT SUMMARY:CP violation results from CMS DTSTART;VALUE=DATE-TIME:20261030T083000Z DTEND;VALUE=DATE-TIME:20261030T084500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6316@cern.ch DESCRIPTION:Speakers: Ruslan Chistov (MIPT\, LPI)\nThe results on the meas urement of CP violation in B(s) and D decays from CMS are reviewed. Among them we present precise measurement of phi_s and sin(2beta) parameters. Th e results are based on pp-collision data at 13 and 13.6 TeV.\n\nhttps://in dico.particle.mephi.ru/event/626/contributions/6316/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6316/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of form factors in the decay $K^+\\to\\mu^+\\nu\\gamma $ in the OKA experiement DTSTART;VALUE=DATE-TIME:20261028T061500Z DTEND;VALUE=DATE-TIME:20261028T063000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6278@cern.ch DESCRIPTION:Speakers: Alexey Khudyakov (INR RAS)\nMeasurements of differen ce between vector and axial form factors $F_V-F_A$ in the decay $K^+\\to\\ mu^+\\nu\\gamma$. Data acquired in 2012 and 2018 is used in the analysis. measurement using latter dataset is presented for the first time.\n\nhttps ://indico.particle.mephi.ru/event/626/contributions/6278/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6278/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for structure dependent component and chiral axial anomaly in K+ -> e+ nu pi0 gamma decay DTSTART;VALUE=DATE-TIME:20261028T063000Z DTEND;VALUE=DATE-TIME:20261028T064500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6279@cern.ch DESCRIPTION:Speakers: Alexei Kulik (Institute for Nuclear Research)\nThe h igh statistics search for structure dependent (SD) components of radiation in K+ -> e+ nu pi0 gamma decay is performed by the OKA collaboration. The 4-dimensional distribution of about 3000 events of the decay in the phase space area of E*(gamma)>30 MeV\, Theta*(e-gamma)\n\nhttps://indico.partic le.mephi.ru/event/626/contributions/6279/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6279/ END:VEVENT BEGIN:VEVENT SUMMARY:The rare events at fixed target experiments DTSTART;VALUE=DATE-TIME:20261028T070000Z DTEND;VALUE=DATE-TIME:20261028T071500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6280@cern.ch DESCRIPTION:Speakers: Dmitry Kirpichnikov (INR RAS)\nThe connection betwee n Standard Model (SM) particles and light dark matter (LDM) can be introdu ced via spin-0\, spin-1\, and spin-2 mediators. Moreover\, in a mediator m ass range from sub-MeV to sub-GeV\, fixed-target facilities can potential ly probe such particles of the hidden sector via missing energy signatures that are described by the bremsstrahlung-like process involving leptons. We also discuss current and prospect experimental reaches for hidden media tors of LDM\, axion-like\, and millicharged particles in the light of reg arding fixed-target experiments.\n\nhttps://indico.particle.mephi.ru/event /626/contributions/6280/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6280/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent Results and Plans of the NA64 Experiment DTSTART;VALUE=DATE-TIME:20261028T071500Z DTEND;VALUE=DATE-TIME:20261028T073000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6282@cern.ch DESCRIPTION:Speakers: Vladimir Samoylenko ()\nThe latest results on the se arch for light dark matter in the NA64 experiment are presented. Searches in electron\, muon\, and hadron beams are considered. The plans for moder nization of the installation for operation in high-intensity beams are out lined.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6282/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6282/ END:VEVENT BEGIN:VEVENT SUMMARY:Prospects of searches for new physics at TiMoFey DTSTART;VALUE=DATE-TIME:20261028T073000Z DTEND;VALUE=DATE-TIME:20261028T074500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6284@cern.ch DESCRIPTION:Speakers: Demidov Sergey (INR RAS)\nIn the talk I'll discuss t he physics program for searching for new physics in the experiment of the recently proposed TiMoFey project\, based at the Troitsk Meson Factory of the Institute for Nuclear Research of the Russian Academy of Sciences. The project involves the use of a high-intensity proton beam with an energy o f 423 (1300) MeV during its first (second) stage. The project's capabiliti es for detecting signals from new light long-lived particles produced in c ollisions between the proton beam and the target will be discussed.\n\nhtt ps://indico.particle.mephi.ru/event/626/contributions/6284/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6284/ END:VEVENT BEGIN:VEVENT SUMMARY:Rare decays at CMS DTSTART;VALUE=DATE-TIME:20261028T064500Z DTEND;VALUE=DATE-TIME:20261028T070000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6286@cern.ch DESCRIPTION:Speakers: Sergey Polikarpov (NRNU MEPhI\, LPI RAS)\nRecent res ults on searches for rare and forbidden decays at the CMS experiment at th e LHC are presented. The analyses use data collected in proton-proton coll isions at center-of-mass energies of 13 and 13.6 TeV.\n\nhttps://indico.pa rticle.mephi.ru/event/626/contributions/6286/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6286/ END:VEVENT BEGIN:VEVENT SUMMARY:Cosmological Axion Sarov Haloscope (CASH): search for dark-matter axions beyond the quantum limit. Status and Preparation for the First Stag e. DTSTART;VALUE=DATE-TIME:20261028T074500Z DTEND;VALUE=DATE-TIME:20261028T080000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6288@cern.ch DESCRIPTION:Speakers: Petr Satunin (INR RAS)\nRecently [Phys. Rev. D 112 ( 2025) 035003\; arXiv:2506.18595 [hep-ph]]\, we proposed an experimental pr oject called the Cosmological Axion Sarov Haloscope (CASH)\, aimed at sear ching for dark-matter axions via their conversion into microwave photons i n a magnetic field. The key feature of the experiment is the use of Joseph son-junction single-photon detectors (JJ SPDs) operating at ultralow tempe ratures\, where thermal noise is negligibly small. This allows us to probe the axion–photon coupling with ultrahigh precision\, with sensitivity t o gaγγ∼(10^{−14}–10^{−15}) GeV^{−1} for axion masses in the range 38–54 μeV\, motivated by generic QCD axion models.\n\nIn this tal k\, we also describe the current preparation for the launch of the first s tage of the experiment: measurements of the parameters of fabricated JJ SP Ds and a high-quality-factor cavity. In addition\, we discuss the design f eatures of tunable cavities and existing prototypes.\n\nhttps://indico.par ticle.mephi.ru/event/626/contributions/6288/ LOCATION: Conference Hall 5 URL:https://indico.particle.mephi.ru/event/626/contributions/6288/ END:VEVENT BEGIN:VEVENT SUMMARY:Improvement of boson mass resolution by correction for final state radiation in the CEPC detector DTSTART;VALUE=DATE-TIME:20261030T074500Z DTEND;VALUE=DATE-TIME:20261030T080000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6181@cern.ch DESCRIPTION:Speakers: Taisiia Popova ()\nIn different analyses of higgsstr ahlung process at CEPC\, the final states with leptons from Z boson decays provide a very clean environment for studies of Higgs boson parameters. W hile the channel $Z\\rightarrow \\mu^+ \\mu^-$ is the most precise\, the c hannel $Z\\rightarrow e^+e^-$ suffers from final state radiation losses. I n the proposed CEPC detector designed for the application of Particle Flow approach\, momenta of charged particles are reconstructed from the tracke r\, while an energy of gammas $-$ from the electromagnetic calorimeter. In this study\, the impact of electromagnetic calorimeter resolution on the correction for final state radiation is estimated. It is demonstrated that the correction of electron energy for final state radiation in the CEPC d etector can improve the boson mass resolution by about a factor of two and make it comparable with that without radiation.\n\nhttps://indico.particl e.mephi.ru/event/626/contributions/6181/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6181/ END:VEVENT BEGIN:VEVENT SUMMARY:A novel approach to Higgs boson mass reconstruction in four-jet fi nal states from e+e- collisions in CEPC at sqrt(s)=240 GeV DTSTART;VALUE=DATE-TIME:20261030T073000Z DTEND;VALUE=DATE-TIME:20261030T074500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6180@cern.ch DESCRIPTION:Speakers: Anna Staritsyna (LPI RAS\, MIPT)\nThe measurement of the Higgs boson parameters constitutes a significant part of the CEPC pro gram. This work is devoted to studying the process e-e+->ZH at sqrt(s) = 2 40 GeV with all-hadronic\, four-jet final states. The CEPC detector fast s imulation and event reconstruction using the Delphes package have been per formed for the signal and different background processes. A novel approach to four-jet final state analysis has been implemented\, which allows bett er reconstruction of boson mass by combining information from dijet invari ant mass and recoil mass to another dijet. The cut-based approach was appl ied to reject leptonic and semileptonic backgrounds. For effective suppres sion of the four-jet background\, a Transformer-based classifier was train ed using the PyTorch framework for binary classification on the mixed data set before or after kinematic cuts. Different combinations of signal effic iencies and purities are considered and their impact on the accuracy of Hi ggs boson mass measurement is estimated.\n\nhttps://indico.particle.mephi. ru/event/626/contributions/6180/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6180/ END:VEVENT BEGIN:VEVENT SUMMARY:e+ e- data: no anomaly in the muon g-2? DTSTART;VALUE=DATE-TIME:20261030T070000Z DTEND;VALUE=DATE-TIME:20261030T071500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6177@cern.ch DESCRIPTION:Speakers: Oleg Zenin (NRC KI -- IHEP)\nUsing an up-to-date com pilation of $\\sigma_{\\mathrm{tot}}(e^+e^- \\to hadrons)$ data we estimat ed the LO hadronic contribution $a_\\mu^{LO\\\, HVP}$ to the muon anomalou s magnetic moment $a_\\mu$. Incompatibilities between $\\sigma_{\\mathrm{t ot}}(e^+e^- \\to hadrons)$ measurements by independent experiments are mit igated by extra systematic uncertainties estimated using as a guideline a requirement of uniformity of $\\chi^2$ distribution over degrees of freedo m in joint fits of $\\sigma_{\\mathrm{tot}}$. Tensions in the $e^+e^-$ inp ut data translate into an expanded uncertainty of the $a_\\mu^{LO\\\, HVP} = (697.7 \\pm {9.8}_{e^+e^-} \\pm 3.6_{sys}) \\times 10^{-10}$. Given thi s\, we obtain $a_\\mu^{\\mathrm{SM}} = 11659185.5(10.6) \\times 10^{-10}$ \, below the experimental world average $a_\\mu^{\\mathrm{exp}}$ at $2\\si gma$ level.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/61 77/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6177/ END:VEVENT BEGIN:VEVENT SUMMARY:Combination of anomalous quartic gauge coupling searches with full ATLAS Run II dataset DTSTART;VALUE=DATE-TIME:20261030T064500Z DTEND;VALUE=DATE-TIME:20261030T070000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6183@cern.ch DESCRIPTION:Speakers: Artur Semushin (A. Alikhanyan National Science Labor atory (Yerevan Physics Institute))\nData provided by the LHC enable search es for a variety of new particles\, but no deviations from the SM have bee n found. Therefore\, these studies are supplemented by indirect searches f or new physics in the same data\, assuming that new particles are inaccess ible. Anomalous quartic gauge couplings can arise in diverse physics model s\; limits on the coupling parameters are related to constraints on new ph ysics model. Searches for these coupling manifestations have been carried out in different final states using data collected by the ATLAS detector i n 2015-2018. This report presents the results of the combination of variou s analyses of vector-boson scattering and a triboson study. This work is n ot only the first combination\, but also the most comprehensive study of a nomalous quartic gauge couplings. It provides confidence intervals for sce narios with one or two non-zero parameters at a time as well as a treatmen t of theory unitarity and positivity bounds. Confidence limits with all co upling parameters being non-zero simultaneously are also set.\n\nhttps://i ndico.particle.mephi.ru/event/626/contributions/6183/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6183/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of ZZ production in pp collisions at $sqrt{s}$ = 13 T eV with the ATLAS detector. DTSTART;VALUE=DATE-TIME:20261030T063000Z DTEND;VALUE=DATE-TIME:20261030T064500Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6182@cern.ch DESCRIPTION:Speakers: Dmitriy Zubov ()\nA study of $Z$-boson pair producti on at a centre-of-mass energy of $\\sqrt{s}$ = 13 TeV is presented. The an alysis uses $140~\\text{fb}^{-1}$ of proton--proton collision data collect ed with the ATLAS detector. Both inclusive $ZZ$ production and $ZZ$ produc tion in association with two jets ($ZZjj$) are considered. The final state is defined by one $Z$ boson decaying into a pair of charged leptons and t he other into a pair of neutrinos. Fiducial cross sections are measured fo r the $ZZ$ and $ZZjj$ production processes. Differential cross sections ar e also measured for a wide range of kinematic observables. In addition\, t he inclusive $ZZ$ cross section is extrapolated to the full phase space fo r $Z$ bosons in the mass range 66--116 GeV. The results are found to be in good agreement with Standard Model predictions.\n\nhttps://indico.particl e.mephi.ru/event/626/contributions/6182/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6182/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches of Higgs Boson decays into Dark Matter particles in the A TLAS and CMS experiments DTSTART;VALUE=DATE-TIME:20261030T061500Z DTEND;VALUE=DATE-TIME:20261030T063000Z DTSTAMP;VALUE=DATE-TIME:20261028T131705Z UID:indico-contribution-315-6178@cern.ch DESCRIPTION:Speakers: Marina Pokidova (NRC Kurchatov Institute PNPI)\nThis report presents the latest results and analysis strategy for the search f or Higgs boson decays into dark matter (DM) particles using data collected during Runs 1 and 2 of the Large Hadron Collider (LHC). The search is int erpreted within Higgs-portal models\, in which the Higgs boson provides a connection between the Standard Model and the dark sector. Upper limits on the Higgs boson branching fraction to invisible final states are derived at a 95% confidence level\, assuming the Standard Model Higgs boson produc tion cross section. The obtained limits represent the most stringent const raints from the ATLAS and CMS experiments at the LHC to date. These values from the ATLAS experiment are compared with the results of direct search experiments.\n\nThe prospects for extending the ATLAS search using data co llected during the initial period of LHC Run 3 are also discussed\, with p articular emphasis on the expected sensitivity to invisible Higgs boson de cays.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6178/ LOCATION: Conference Hall 2 URL:https://indico.particle.mephi.ru/event/626/contributions/6178/ END:VEVENT END:VCALENDAR