BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Study of charged spectators multiplicity distributions in nucleus- nucleus reactions at the HADES experiments DTSTART;VALUE=DATE-TIME:20220712T143000Z DTEND;VALUE=DATE-TIME:20220712T145000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-222@events.sinp.msu.ru DESCRIPTION:Speakers: Irina Yumatova (INR RAS & NRNU MEPhI)\nMultiplicity distributions of charged spectators with Z=1\, 2\, 3 measured\nat the HADE S experiments in reactions Ag+Ag at 1.58 AGeV and Au+Au at\n1.23 AGeV will be presented. The experimental data have been obtained by\nForward multic hannel scintillation detector\, Forward Wall (FWall). The\nmultiplicity di stributions of charged fragments for different centrality\nclasses have be en compared with simulated ones obtained in the SHIELD\nand DCM-QGSM-SMM m odels.\n\nhttps://events.sinp.msu.ru/event/8/contributions/222/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/222/ END:VEVENT BEGIN:VEVENT SUMMARY:Magnitude and skewness of elliptic flow fluctuations at NICA energ ies DTSTART;VALUE=DATE-TIME:20220715T074000Z DTEND;VALUE=DATE-TIME:20220715T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-226@events.sinp.msu.ru DESCRIPTION:Speakers: Vinh Luong (Joint Institute for Nuclear Research)\nI n this work\, we exploit the cumulant ratios: $v_2\\{4\\}/v_2\\{2\\}$ and $v_2\\{6\\}/v_2\\{4\\}$ to study the magnitude and skewness of elliptic fl ow fluctuations in Au+Au collisions at NICA energies in the framework of s everal state-of-the-art models of relativistic heavy-ion collisions. The a greement of $v_2\\{4\\}/v_2\\{2\\}$ ratio for different models with differ ent initial conditions supports the assumption that dominant contribution to the final elliptic flow fluctuations is the participant fluctuations in the initial geometry.\n\nhttps://events.sinp.msu.ru/event/8/contributions /226/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/226/ END:VEVENT BEGIN:VEVENT SUMMARY:DEVELOPMENT OF A NON-EQUILIBRIUM HYDRODYNAMIC APPROACH TO DESCRIBI NG THE EMISSION OF HIGH-ENERGY SECONDARY PARTICLES IN COLLISIONS OF HEAVY IONS OF INTERMEDIATE ENERGIES DTSTART;VALUE=DATE-TIME:20220715T151000Z DTEND;VALUE=DATE-TIME:20220715T153000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-578@events.sinp.msu.ru DESCRIPTION:Speakers: Alexander Dyachenko (Petersburg State Transport Univ ersity)\nA.T. D’yachenko$^{1\,2}$\, I. A. Mitropolsky$^{2}$\n$^{1}$ *Emp eror Alexander I Petersburg State Transport University\, St. Petersburg\, Russia*\; \n$^{2}$ *B.P. Konstantinov Petersburg Nuclear Physics\, Insti tute\, National Research Center “Kurchatov Institute”\, Gatchina\, Rus sia*\n E-mail: dyachenko_a@mail.ru \n\nDeveloping the hydrodynamic approac h in describing collisions of heavy ions of intermediate energies [1-6]\, we proposed to solve the kinetic equation together with the solution of th e equations of hydrodynamics [2\,3]. This made it possible to successfully describe the double differential cross sections for the emission of proto ns and pions in collisions of medium-energy heavy ions [2\, 3]. We also ma naged to completely describe the spectra of protons\, pions\, and photons for the collision of carbon nuclei with a beryllium target in the energy r ange of 0.3–3.2 GeV per nucleon\, obtained in the ITEP experiments [7\, 8]. When describing these spectra\, the correction for the microcanonical distribution [4\, 5] was taken into account\, and the contribution of the fragmentation process was also taken into account for the proton yields [6 ]. \n\nThe contribution of the effects of short-range correlations SRC\, w hich has recently received much attention [9]\, was also studied by us. As a result\, it turned out that these effects are included in our approach\ , since we successfully describe the experimental data on the spectra of h ard photons [10]\, which are described in [9] with the addition of a high- momentum component. Our approach is applicable to collisions of both light and heavy nuclei\, which can be seen from a comparison of the description of the proton distributions in transverse momentum in the Au+Au reaction at an energy of 1.48 GeV per nucleon with experimental data and other theo retical approaches based on solving the Boltzmann equation\, the quantum m odel molecular dynamics\, etc. [11]. This can be extended to the energy ra nge of the reptile complex NICA located at JINR (Dubna).\n\n1. A. T. D’ yachenko\, K.A. Gridnev\, and W. Greiner\, J. Phys. G 40\, 085101 (2013).\ n2. A. T. D’yachenko\, I. A. Mitropolsky\, Phys. Atom. Nucl. 82\, 1641 (2019).\n3. A. T. D’yachenko\, I. A. Mitropolsky\, Bull. Russ. Acad. S ci.: Phys. 84\, 391(2020).\n4. A. T. D’yachenko\, I. A. Mitropolsky\, EPJ Web Conf. 204\, 03018 (2019).\n5. A. T. D’yachenko\, I. A. Mitropol sky\, Phys. Atom.Nucl. 83\, 558 (2020).\n6. A. T. D’yachenko. I. A. Mi tropolsky \, Bull. Russ. Acad. Sci.: Phys. 85\, 554(2021).\n7. B.M. Abram ov et al.\, Phys. Atom. Nucl. 78\, 373 (2015).\n8. I.G. Alekseev et al. \, Phys. Atom. Nucl. 78\, 936 (2015).\n9. W.M. Guo\, B.A. Li\, G.C. Yo ng\, Phys.Rev.C 104\,034603 (2021).\n10. J. Stevenson et al.\, Phys. Rev. Lett. 57\, 555 (1986).\n11. E. E. Kolomeitsev et al. J. Phys. G 31 741(20 05).\n\nhttps://events.sinp.msu.ru/event/8/contributions/578/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/578/ END:VEVENT BEGIN:VEVENT SUMMARY:MCDST: A UNIFIED STORAGE FORMAT FOR HEAVY ION COLLISION SIMULATED DATA DTSTART;VALUE=DATE-TIME:20220712T153000Z DTEND;VALUE=DATE-TIME:20220712T155000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-211@events.sinp.msu.ru DESCRIPTION:Speakers: Ekaterina Kuzina (NRNU MEPhI)\nEach Monte Carlo gene rator used for heavy-ion collision simulations has a specific output form of simulated events. This fact complicates data storage and prevent standa rdization of processing data generated considering different models. \nThe McDst format is implemented to work around this. The format allows to sto re and smoothly read simulated data\, that obtained from different generat ors\, for analysis performance. To take advantage of the McDst unified app roach a set of convertors for popular MC generators output formats is also implemented. Discussed programming solution is developed in C++ using ROO T libraries. \nIn this talk\, the architecture of the McDst format is pres ented. A quick start guide to ease simulated data processing is also provi ded.\n\nhttps://events.sinp.msu.ru/event/8/contributions/211/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/211/ END:VEVENT BEGIN:VEVENT SUMMARY:Methods for centrality determination in heavy-ion collisions with the MPD experiment DTSTART;VALUE=DATE-TIME:20220715T093000Z DTEND;VALUE=DATE-TIME:20220715T095000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-230@events.sinp.msu.ru DESCRIPTION:Speakers: Ilya Segal (National Research Nuclear University MEP hI)\nCentrality is an important concept in the study of strongly interacti ng matter created in a heavy-ion collision whose evolution depends on its initial geometry. Experimentally collisions can be characterized by the me asured multiplicities or energy of produced particles or spectator fragmen ts. Relation between collision geometry and experimentally measured multip licities is commonly evaluated within the Monte-Carlo Glauber approach. \n We will present methods for centrality determination in heavy-ion collisio ns with the Multi Purpose Detector (MPD) experiment at the future Nuclotro n-based Ion Collider fAcility (NICA). The multiplicity of charged hadrons is provided by the MPD Time Projection Chamber (TPC) and connected to coll ision geometry parameters using the Monte-Carlo Glauber model. The energy of spectator fragments is estimated with the MPD Forward Hadron Calorimete r (FHCal). We will also touch possibilities to determine centrality using the FHCal and Monte-Carlo Glauber model.\n\nhttps://events.sinp.msu.ru/eve nt/8/contributions/230/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/230/ END:VEVENT BEGIN:VEVENT SUMMARY:Smoking gun of nuclear clusterization in collisions of light relat ivistic nuclei DTSTART;VALUE=DATE-TIME:20220715T143000Z DTEND;VALUE=DATE-TIME:20220715T145000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-321@events.sinp.msu.ru DESCRIPTION:Speakers: Aleksandr Svetlichnyi (INR RAS\, MIPT(NRU))\nInterac tions of C nuclei with various targets were studied in BM@N experiment at NICA [1]. Studies of O–O collisions are foreseen in future experiments a fter the LHC upgrade [2] as a part of a program to scan the size of collid ing systems. As follows from calculations [3\,4]\, the admixture of the a lpha-clustered states in C and O leads to a triangular modulation of ellip tic flow from the overlap region of colliding nuclei. It is also known [5] that forward alpha-particles are produced in fragmentation of relativisti c O in nuclear photoemulsion. This suggests the impact of alpha-clusteriza tion in O also on spectator matter. First calculations [6] of yields of secondary nuclei (He\, Li\, Be\, B\, C\, N) from fragmentation of O with o ur Abrasion-Ablation Monte Carlo for Colliders model taking into account p re-equilibrium clusterization of spectator matter (AAMCC-MST) [7] demonst rated general agreement with data [5]. However\, the production of pairs and triplets of alphas was essentially underestimated together with the pr oduction of carbon [6] with respect to measurements [5].\n In order to re move this discrepancy\, in the present work AAMCC-MST was extended by acco unting for clustered states in nucleon configurations of initial O in addi tion to MST-clustering after the abrasion stage. Three nuclear density pro files in O based on [4\,8] were implemented in AAMCC-MST to sample the pos itions of neutrons and protons in O\, including one with accounting for cl ustered states. Results of calculations with all three profiles and with d ifferent sizes of intranuclear alpha-clusters were compared with the data on fragmentation of O [5]. While the production of alpha-particles is und erestimated for all the parameterizations of nuclear densities in O\, the results with the clustered nuclear density appear to be closer to the data . Further development of AAMCC-MST on the basis of the hierarchical cluste ring is planed.\n\n[1] M. Kapishin\, JPS Conf. Proc. 32 (2020) 010093\n[2] Z. Citron et al.\, CERN Yellow Rep. Monogr. 7 (2019) 1159\n[3] W. Broniow sky et al.\, Nucl. Phys. A 1005 (2021) 121763 \n[4] S.H. Lim et al.\, Phys . Rev. C 99 (2019) 044904\n[5] M. El-Nagdy et al.\, J. Phys. Commun. 2 (20 18) 035010\n[6] A. Svetlichnyi et al.\, PoS\, EPS-HEP2021 (2022) 310\n[7] R. Nepeivoda\, et al.\, Particles 5 (2022) 40 \n[8] J. He et al.\, Phys Re v C 104 (2021) 044902\n\nhttps://events.sinp.msu.ru/event/8/contributions/ 321/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/321/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance of the precise electromagnetic calorimeter ALICE/PHOS and upgrade plans DTSTART;VALUE=DATE-TIME:20220712T103000Z DTEND;VALUE=DATE-TIME:20220712T105000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-216@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitri Peresunko (NRC Kurchatov institute)\nThe phot on spectrometer (PHOS) of the ALICE experiment is a high-granularity PbWO4 crystal calorimeter with avalanche photodiode (APD) readout. Its primary physics goal is the measurement of direct photon and neutral meson spectra and correlations in pp\, p-A and A-A collisions. PHOS participated in LHC Run 1 (2009-2013) and Run 2 (2015-2018)\, during which a large amount of physical data were collected in pp\, p-Pb and Pb-Pb collisions.\n\nThe cho ice of active material with small Molière radius allows PHOS to operate i n a high-multiplicity environment and to reconstruct neutral pions\nby two -photon decays up to very high transverse momenta ~60 GeV/c. In order to i ncrease the light yield of the crystals and reduce electronic noise\,\nPHO S is cooled down and kept at a constant temperature of -25^{o} C. This res ulted in excellent energy and position resolutions. Dedicated L0 and L1 tr iggers were used to increase collected integrated luminosity during data t aking.\n\nWe will present an overview of the PHOS performance during Runs 1 and 2 and plans for an upgrade for LHC Run 4 and beyond with the aim of improving the time and energy resolution and extending the dynamic range d own to low energies. This goal can be achieved by upgrading the photodetec tors from APD to multi-pixel photon counters (MPPC)\, upgrading the front- end electronics and the detector mechanics. The expected improvements of t he time and energy resolutions will be presented and the resulting reducti on of systematic uncertainties of ongoing analysis and new possibilities w ill be discussed.\n\nhttps://events.sinp.msu.ru/event/8/contributions/216/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/216/ END:VEVENT BEGIN:VEVENT SUMMARY:Total and partial shear viscosity of hadrons in Au+Au collisions a t intermediate energies accessible to NICA DTSTART;VALUE=DATE-TIME:20220715T091000Z DTEND;VALUE=DATE-TIME:20220715T093000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-223@events.sinp.msu.ru DESCRIPTION:Speakers: Evgeny Zabrodin (SINP MSU)\nWe calculate the total a nd partial shear viscosity of hadrons\nproduced in central gold-gold colli sions at intermediate energies. For\ncalculations of the collisions the tr ansport model UrQMD is employed.\nThe shear viscosity is obtained within t he framework of Green-Kubo\nformalism. The hadron resonance gas (HRG) mode l is used to determine\ntemperature and chemical potentials of baryon char ge and strangeness\nout of the microscopic model calculations. Then\, we d etermine the\npartial viscosity of main hadron species\, such as nucleons\ , pions\,\nkaons and Lambdas\, by studying the relaxation of hot and dense nuclear\nmatter in the box with periodic boundary conditions.\nIt is foun d that the decrease of the beam energy from\n$E_{lab} = 40$~AGeV to 10~AGe V leads to rise of baryon shear viscosity\naccompanied by drop of shear vi scosity of mesons. In contrast to that\nof non-strange hadron species\, th e shear viscosity of kaons and Lambdas\nremains independent on energy with in the studied energy range. Its\nratio over the entropy density increases with the drop of temperature\nand rise of baryon chemical potential.\n\nh ttps://events.sinp.msu.ru/event/8/contributions/223/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/223/ END:VEVENT BEGIN:VEVENT SUMMARY:The effect of charged particle multiplicity fluctuations on centra lity determination procedure using Bayesian approach at NICA energy range DTSTART;VALUE=DATE-TIME:20220715T101000Z DTEND;VALUE=DATE-TIME:20220715T103000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-250@events.sinp.msu.ru DESCRIPTION:Speakers: Dim Idrisov (MEPHi)\nCentrality determination in hea vy ion collisions is an important task\, because it allows us to compare t he results from different experiments and models. To determine centrality\ , different methods are used. In this paper\, a method based on inverse Ba yes' theorem is considered. A new description of the fluctuations of charg ed particle multiplicity and their transverse energy is also proposed for a more accurate impact parameter reconstruction.\n\nhttps://events.sinp.ms u.ru/event/8/contributions/250/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/250/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the deuteron analyzing powers Ay\, Ayy and Axx in d p- elastic scattering at Nuclotron DTSTART;VALUE=DATE-TIME:20220714T142900Z DTEND;VALUE=DATE-TIME:20220714T144900Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-237@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Ladygin (VBLHEP JINR)\nThe results on the the vector Ay and tensor Ayy and Axx analyzing powers in deuteron-proton elastic scattering at large scattering angles are presented. \nThese data were obtained at internal target at JINR Nuclotron \nin the energy range 400-1800 MeV using polarized deuteron beam \nfrom new polarized ion sourc e.\nNew data on the deuteron analyzing powers in the wide energy range demonstrate the sensitivity to the short-range spin structure of the isos calar nucleon-nucleon correlations.\n\nhttps://events.sinp.msu.ru/event/8/ contributions/237/ LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/237/ END:VEVENT BEGIN:VEVENT SUMMARY:SEARCH FOR NUCLEON-NUCLEON CORRELATIONS IN NUCLEUS-NUCLEUS COLLISION AT THE MPD/NICA DTSTART;VALUE=DATE-TIME:20220715T082000Z DTEND;VALUE=DATE-TIME:20220715T084000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-256@events.sinp.msu.ru DESCRIPTION:Speakers: Bogdan Lavrov (National Research Nuclear University\ , MEPhI\, Moscow\, Russia.)\nB. O. Lavrov1\,2\, A. B. Kurepin1\n 1Institute for Nuclear Research\, Russian Academy of Sciences\, Moscow\ , Russia\;\n 2National Research Nuclear University\, MEPhI\, Mos cow\, Russia.\n E-mail: lavrov.bogdan@list.ru \nA proposal for an experiment to measure the cross section of pion\, kaon\, proton and antiproton production in a nucleus-nu cleus collision in a kinematically forbidden region for nucleon-nucleon in teraction on the MPD/NICA is considered. It is shown that this process ca n be separated from the kinematically allowed production process using the existing detectors of the MPD facility at an energy of 9.2 GeV. The da ta could be used to search for scaling dependence\, which was observed ear lier at lower energies [1]. Obtaining new results is of great importance f or estimating the magnitude of the probability of the subthreshold heavy p articles production process [2].\n\n1. A. Kurepin et al.\, Acta Physica Po lonica B\, 27\, 3077 (1996).\n2. A. Kurepin\, Journal of Modern Physics 12 \, 433 (2021).\n\nhttps://events.sinp.msu.ru/event/8/contributions/256/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/256/ END:VEVENT BEGIN:VEVENT SUMMARY:Energy dependence of triangular flow for identified hadrons in Au+ Au collisions at $\\sqrt{s_{NN}} = 14.5 - 62.4$ GeV from the STAR experime nt DTSTART;VALUE=DATE-TIME:20220712T070000Z DTEND;VALUE=DATE-TIME:20220712T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-205@events.sinp.msu.ru DESCRIPTION:Speakers: Alexey Povarov (NRNU MEPhI)\nAuthor: Alexey Povarov (for the STAR Collaboration)\nNational Research Nuclear University MEPhI\, Moscow\, Russia\nE-mail: povarovas@gmail.com\n\nHeavy-ion collisions crea te matter which is characterized by high temperature and energy density\, called Quark-Gluon Plasma (QGP). One of the methods for studying the trans port properties and equation of state of the created matter is the measure ment of azimuthal anisotropy of particles using the Fourier expansion of t he azimuthal angle with respect to the event plane. The second order Fouri er coefficient $\\upsilon_{2}$ is called elliptic flow and is sensitive to the pressure gradients arising in the region of overlapping nuclei. The t hird order coefficient $\\upsilon_{3}$ (triangular flow) is sensitive to t he fluctuations of nucleons in the initial state of colliding nuclei and t herefore $\\upsilon_{3}$ weakly depends on the collision centrality. Theor etical studies show that $\\upsilon_{3}$ is more sensitive to viscous effe cts than $\\upsilon_{2}$\, making triangular flow an ideal harmonic for st udying the viscosity.\n \nThis work is devoted to the study of triangul ar flow in a wide energy range of Au+Au collisions from the STAR experimen t at RHIC ($\\sqrt{s_{NN}}$ = 14.5\, 19.6\, 27\, 39\, 62.4 GeV). New measu rements of triangular flow will be presented as a function of particle tra nsverse momenta ($\\text{p}_{\\text{T}}$) and collision energy. Physics im plications will be discussed.\n\nhttps://events.sinp.msu.ru/event/8/contri butions/205/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/205/ END:VEVENT BEGIN:VEVENT SUMMARY:Pion femtoscopy in Au+Au collisions at sqrt(sNN) = 3 GeV in the ST AR experiment DTSTART;VALUE=DATE-TIME:20220712T072000Z DTEND;VALUE=DATE-TIME:20220712T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-504@events.sinp.msu.ru DESCRIPTION:Speakers: Anna Kraeva ()\nPion femtoscopy in Au+Au collisions at $\\sqrt{s_{NN}} = 3$ GeV in the STAR experiment\n\nA. Kraeva (for the S TAR Collaboration)\nE-mail: annakraeva555@gmail.com\nNational Research Nuc lear University MEPhI\, Kashirskoe highway 31\, Moscow\, 115409\, Russia\n \n\nThere is a method that allows directly measuring the spatio-temporal e xtent of the region where hadrons are emitted and the parameters of the nu clear-nuclear interaction\, called femtoscopic correlation [1]. In heavy-i on collisions\, femtoscopy is an important tool for studying the geometric and dynamic characteristics of the emission region.\nTwo-particle momentu m correlations of identical particles in nuclear-nuclear collisions make i t possible to extract femtoscopic parameters (radii of emission region\, $ R$\, and correlation strength\, $\\lambda$) [2]. Reaction dynamic is refle cted in the femtoscopic radii dependence on pair transverse momentum\, $k_ T$.\nThis work is devoted to the study of two-particle momentum correlatio ns of identical pions produced in collisions of gold nuclei in the STAR ex periment at the RHIC at $\\sqrt{s_{NN}} = 3$ GeV. The extracted three-dime nsional femtoscopic radii ($R_{out}$\, $R_{side}$\, $R_{long}$) are measur ed as a function of collision centrality and transverse momentum of the pa irs.\n\n\nReferences:\n[1] Podgoretsky M.I. Interference correlations of i dentical pions\, Sov. J. Nucl. Phys. – 1989. – V.20. – P.3.\n[2] Lis a M.A. et al. Femtoscopy in relativistic heavy ion collisions: two decades \nof progress\, Annu. Rev. Nucl. Part. Sci. – 2005. – V.55. – P.357. \n\nhttps://events.sinp.msu.ru/event/8/contributions/504/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/504/ END:VEVENT BEGIN:VEVENT SUMMARY:Direct photon and neutral meson production results from ALICE expe riment DTSTART;VALUE=DATE-TIME:20220712T091000Z DTEND;VALUE=DATE-TIME:20220712T093000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-203@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitry Blau (NRC "Kurchatov Institute")\nThe ALICE e xperiment at the LHC is dedicated to the study of the hot and dense medium produced in heavy-ion collisions\, the so-called quark-gluon plasma (QGP) . Neutral meson spectra and direct photon spectra at high $p_{\\rm T}$ imp ose constraints on parton distribution functions in protons and nuclei\, a nd provide information about the transport properties of the QGP. The temp erature of the hot fireball created in a heavy-ion collision can be studie d via the measurement of low-$p_{\\rm T}$ direct photons. \n\nPhotons are reconstructed in ALICE with two complementary methods\, using the electrom agnetic calorimeters or via the reconstruction of e$^+$e$^-$ pairs from co nversions in the ALICE detector material using the central tracking system . This approach provides reliable cross checks of results and allows to re duce the statistical and systematic uncertainties of the measurements. In addition\, the fraction of direct photons to inclusive photons can be meas ured with virtual photons (dielectrons) at low $p_{\\rm T}$ with different systematic uncertainties.\n\nWe report recent results from ALICE on the d irect photon and neutral meson measurements in pp\, p-Pb\, and Pb-Pb colli sions and compare them to model calculations.\n\nhttps://events.sinp.msu.r u/event/8/contributions/203/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/203/ END:VEVENT BEGIN:VEVENT SUMMARY:Test of full PSD readout chain at the mCBM DTSTART;VALUE=DATE-TIME:20220712T145000Z DTEND;VALUE=DATE-TIME:20220712T151000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-258@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitry Finogeev ()\nThe forward hadron calorimeter ( PSD – Projectile Spectator Detector will be used at the Compressed Baryo nic Matter (CBM) experiment at FAIR to measure the nucleus-nucleus collisi on centrality and orientation of the reaction plane. The PSD is a sampling lead/scintillator with modular transverse structure and longitudinal segm entation. The PSD has 46 modules with 10 longitudinal sections in each mod ule. Light readout from each section is provided by Hamamatsu MPPC install ed at the rare side of modules.\nThe PSD FEE and readout system is based o n the ADC FPGA board\, which was originally designed for ECAL at PANDA. Th is board employs two Kintex-7 FPGAs\, which are processing the incoming da ta from ADCs with 14-bit resolution and 125MHz digitization rate for 32 ch annels per one FPGA. Due to high radiation doses and neutron fluences expe cted at the CBM\, PSD readout electronics will be placed in the radiation protected room. Boards with photodetectors (MPPCs) will be placed on the b ack plane of the PSD without preamplifiers and will be connected with 60m coaxial cable with readout electronics placed outside of the cave. \nThe d eveloped data acquisition system registers signals from 2.5 mV to 1.5 V\, which provides coverage of the dynamic range x500 when adjusting the volt age corresponding to photodetectors for temperature correction of their ga in. Direct digitization of low amplitude signals without the use of active electronics on the detector side is a new approach for the detector's rea dout system in nuclear physics\, which makes it possible to realize the ma ximum possible dynamic range of the detector.\nThe full chain of the FEE a nd readout electronics of one PSD module - "mini PSD" (mPSD) has been ass embled at mCBM. The readout has been integrated into mCBM trigger-less dat a acquisition system. Details of the PSD readout electronics\, signal proc essing and transmission within the common synchronized mCBM data transport system will be shown.\n\nhttps://events.sinp.msu.ru/event/8/contributions /258/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/258/ END:VEVENT BEGIN:VEVENT SUMMARY:Studies of double pion electroproduction with CLAS12 in kinematics with missing hadron DTSTART;VALUE=DATE-TIME:20220714T125000Z DTEND;VALUE=DATE-TIME:20220714T130000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-424@events.sinp.msu.ru DESCRIPTION:Speakers: Aleksandr Bulgakov (Moscow State University\, Physic s Department)\nExсlusive 𝑁𝜋 and 𝜋$^+$𝜋$^−$𝑝 electroprodu ction channels currently represent the major source of information on nucl eon resonance ($N^*$) electroexcitation amplitudes. Experiments with CLAS detector on exploration of 𝜋$^+$𝜋$^−$𝑝 electroproduction at Jef ferson lab with decisive contribution from Moscow State University group p rovided information on electroexcitation amplitudes of most excited states of the nucleon in the mass range up to 1.8 GeV. These results offer a uni que insight into many facets of strong interaction in non-perturbative reg ime which underlie the generation of different resonances with different s tructural features as the bound systems of quarks and gluons. [1\,2].\nFur ther extension of the efforts on exploration of 𝜋$^+$𝜋$^−$𝑝 ele ctroproduction with the new CLAS12 detector in the 12 GeV era of experimen ts at JLab will be presented in the talk. CLAS12 takes data using electron beams with energies up to 11 GeV which allows to probe the structure of n ucleon resonances at highest photon virtualities ($Q^2$) ever achieved up to 10 GeV$^2$. The event selection of the 𝑒𝑝 →𝑒′𝑝′𝜋$^ +$𝜋$^−$ channel measured in CLAS12 for the kinematics where one final hadron is missing will be presented. The plan for extraction of 𝜋$^+$ 𝜋$^−$𝑝 differential cross sections will be outlined.\n\n1. Carman D.S.\, Joo K.\, Mokeev V.I. et al. // Strong QCD Insights from Excited Nuc leon Structure Studies with CLAS and CLAS12\, Few Body Syst. (2020) 61\, 2 9.\n2. Brodsky S.J. et al. // Strong QCD from Hadron Structure Experiment s\, International Journal of Modern Physics E Vol. 29\, No. 08\, 2030006 ( 2020).\n\nhttps://events.sinp.msu.ru/event/8/contributions/424/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/424/ END:VEVENT BEGIN:VEVENT SUMMARY:Performance for spectator symmetry plane estimation with the BM@N experiment DTSTART;VALUE=DATE-TIME:20220715T095000Z DTEND;VALUE=DATE-TIME:20220715T101000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-270@events.sinp.msu.ru DESCRIPTION:Speakers: Mikhail Mamaev (NRNU MEPhI)\nThe Baryonic Matter at Nuclotron experiment (BM@N) aims to study the area of QCD phase diagram at high net baryon densities and moderate temperatures with collisions of he avy ions at $\\sqrt{s_{NN}}$ = 2.3–3.5 GeV. Anisotropic transverse flow is one of the most important observable phenomena in a study of the proper ties of matter created in such collisions. Flow measurements require the k nowledge of collision symmetry plane\, which can be determined from deflec tion of collision spectators in the plane transverse to the direction of t he moving ions. \nBM@N performance for projectile spectator symmetry plane estimation is studied with Monte Carlo simulations using Xe+Cs collisions with beam energies of 4A GeV generated with the DCM-QGSM-SMM model. Inves tigated different data-driven methods to extract correction factor in flow analysis for the resolution of spectator symmetry plane estimated with th e BM@N Forward Hadron Calorimeter.\n\nhttps://events.sinp.msu.ru/event/8/c ontributions/270/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/270/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of cumulative processes in correlation with strangeness and charm production in hadronic collisions at SPS and NICA energies. DTSTART;VALUE=DATE-TIME:20220715T070000Z DTEND;VALUE=DATE-TIME:20220715T072000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-284@events.sinp.msu.ru DESCRIPTION:Speakers: Semyon Yurchenko (Saint Petersburg State University) \nSTUDY OF CUMULATIVE PROCESSES IN CORRELATION WITH STRANGENESS AND CHARM PRODUCTION IN HADRONIC COLLISIONS AT SPS AND NICA ENERGIES.\nS.V. Yurchenk o\, A.A. Marova\, G.A. Feofilov\nSaint Petersburg State University\, Saint Petersburg\, Russia\;\nE-mail: st098136@student.spbu.ru\n New mechanism [ 1\,2] of strangeness and charm production was proposed in high energy hadr onic collisions in association with the cumulative particle formation on t he flucton. The concept of flucton [3]. - a “droplet” of dense cold nu clear matter\, that might be formed in the target nucleus\, was motivated by several observations [4-6] of particle production in a so-called kinema tically forbidden\, in reaction with free nucleons\, region. The novel app roach [1\,2] is based on the joint consideration of the flucton and the re levant formation of strongly overlapping quark-gluon strings. In the last case\, the fusion of quark-gluon strings might be responsible for the incr eased yields of particles containing strange or charm quarks. The first re sults of studies of possibilities for experimental observations of cumulat ive particles production that could correlate with strangeness and charm y ields\, were presented earlier in [7].\n In our report we discuss the conc ept of new\, compact detector we propose for registration of cumulative pa rticles as a trigger for studies of correlation with strangeness and charm in the fixed-target experiments at SPS and NICA. We discuss\, with the ac count of cumulative particle yield analysis [8]\, the estimations of stran ge and cumulative particle yields\, selection of the kinematical regions a nd some preliminary conclusions about the structure of this compact detect or using the Geant4 simulations.\n\nAcknowledgements. This research has be en conducted with financial support from St. Petersburg State University ( project No 93025435).\nReferences:\n1. V. Vechernin\, in materials of the IVth Rissian-Spanish\nCongress:Particle\, Nuclear\, Astroparticle Physics and Cosmology\, 4-8 September 2017\, JINR\, Dubna (Russia)\, http://refhub .elsevier.com/S0168-9002(20)31065-2/sb3\n2. V.V. Vechernin\, Physics of Pa rticles and Nuclei 52 (4) 604-608 (2021)\n3. Blokhintsev D.I.\, JETP 33 (1 957) 1295.\n4. G.A. Leksin et al.\, ZhETF 32\, 445 (1957)\n5. L.S. Azhgire j et al.\, ZhETF 33\, 1185 (1957)\n6. Yu.D.Bayukov et al.\, Izv. AN SSSR 3 0\, 521 (1966)\n7. T.V.Lazareva et al.\, Bull.Russ.Acad.Sci. Physics\, 83( 9)\, 1155-1160. (2019). \n8. M. A. Braun and V. V. Vechernin\, Theor. Math . Phys. 139 (2004)\, 766-786\n\nhttps://events.sinp.msu.ru/event/8/contrib utions/284/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/284/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of DCS for forward spectator detectors at the BM@N\, M PD/NICA and NA61/SHINE experiments DTSTART;VALUE=DATE-TIME:20220714T120000Z DTEND;VALUE=DATE-TIME:20220714T122000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-283@events.sinp.msu.ru DESCRIPTION:Speakers: Oleg Petukhov (INR RAS)\nAbstract\n\nThe BM@N and MP D experiments at NICA facility (Dubna\, Russia) will use the forward hadro n calorimeters (FHCal) for centrality and reaction plane determination in the heavy ion collisions. Also the BM@N setup features Scintillation Wall and the Beam Hodoscope detectors for charged fragments measurements. The N A61/SHINE experiment at CERN is using two projectile spectator detectors ( Main PSD and Forward PSD) for centrality and reaction plane measurements. \nAll detectors have light readout based on silicon photomultipliers. In e ach experiment forward detectors have several hundred readout channels. \n Forward detectors share the common architecture that simplifies the develo pment of the Detector Control System (DCS). The developed algorithms and s oftware for the DCS of these detectors to control the bias MPPCs voltages and the temperature of MPPCs and its integration into the experiment-wide DCS will be reported.\n\nhttps://events.sinp.msu.ru/event/8/contributions/ 283/ LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/283/ END:VEVENT BEGIN:VEVENT SUMMARY:Femtoscopic analysis of identical charged kaons in Pb–Pb collisi ons at 5.02 TeV with ALICE DTSTART;VALUE=DATE-TIME:20220713T122000Z DTEND;VALUE=DATE-TIME:20220713T124000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-233@events.sinp.msu.ru DESCRIPTION:Speakers: Gleb Romanenko (JINR\, MSU)\nFemtoscopy is an import ant tool for studying space–time properties of the emission sources crea ted in heavy-ion collisions such as spatial sizes\, evolution duration\, c ollective flow effects\, etc. The importance of kaon femtoscopy is to chec k different model scenarios that work equally well for pions. In this cont ribution\, we present the results of femtoscopic analysis of identical cha rged-kaon correlations in Pb–Pb collisions at 5.02 TeV. The results of o ne- and three-dimensional analyses show that the kaon femtoscopic radii ar e smaller for more peripheral collisions and decrease with increasing of t ransverse momentum. According to hydrokinetic models\, it might be explain ed by the radial expansion of the emission source. Comparison between the obtained three-dimensional radii and the integrated Hydro Kinetic Model ca lculations for two particularization temperatures obtained from two differ ent Equations of State has been performed. The one-dimensional radii are c ompared with the same results for other colliding systems\, Pb–Pb at 2.7 6 TeV\, p–Pb at 5.02 TeV and pp at 7 TeV\, as a function of event multip licity to check whether they have the common trend or not. Another importa nt result of this analysis is the extraction of the maximal emission times for kaons in a wide centrality range (from 0 to 90%).\n\nhttps://events.s inp.msu.ru/event/8/contributions/233/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/233/ END:VEVENT BEGIN:VEVENT SUMMARY:A SPECIFIC HEAT OF NUCLEAR MEDIUM PROBED BY $K_S^0$ MESONS PRODUC ED IN $Au+Au$ COLLISIONS AT RHIC DTSTART;VALUE=DATE-TIME:20220713T130000Z DTEND;VALUE=DATE-TIME:20220713T132000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-553@events.sinp.msu.ru DESCRIPTION:Speakers: Mikhail Tokarev (Join Institute for Nuclear Research )\nThe data [1] on spectra of $K_S^0$ mesons measured by the STAR Collabor ation in Au+Au collisions at various centralities characterized by differe nt multiplicity densities of negative particles were analyzed in the $z$-s caling approach [2\,3]. The transverse momentum distributions obtained in the BES-I program at RHIC were accumulated in seven centrality classes fro m the most central 0-5% to peripheral 60-80% collisions in the rapidity ra nge $|y|<0.5$. These data and the earlier STAR data at $\\sqrt {s_{NN}}=$ 62\, 130 and 200 GeV allow us a detail study of the energy and centrality dependence of $K_S^0$-meson production in a wide range of $\\sqrt {s_{NN}} =$ 7.7–200 GeV.\nThe scaling function $\\psi(z)$ was constructed and the self-similarity of $K_S^0$-meson production was confirmed. It was found t hat the model parameter $c_{AuAu}$ interpreted as a specific heat of produ ced medium depends on collision energy. The scaling behavior is consistent with an abrupt decrease of $c_{AuAu}$ from the value of 0.16 at $\\sqrt { s_{NN}}=$ 7.7 and 11.5 GeV to about 0.09 at the top RHIC energy. At $\\sqr t {s_{NN}}=$39 GeV\, a kink in the significant drop of this parameter is o bserved\, as well as an indication of its flattening at higher $\\sqrt {s_ {NN}}$. The non-trivial dependence of $c_{AuAu}$ on the collision energy obtained from the $z$-scaling of $K_S^0$-meson production shows that the s trange probe is much more sensitive to properties of nuclear medium than a non-identified negative hadron [3]. The irregularities in the behavior of the specific heat parameter cAuAu could indicate existence of a phase tra nsition in nuclear matter.\n\n1. J. Adam et al. (STAR Collaboration)\, Phy s. Rev. C 102\, 034909 (2020).\n2. M. Tokarev et al.\, Phys. Part. Nucl. 5 1\, 141 (2020).\n3. M. Tokarev\, A. Kechechyan\, I. Zborovský\, Nucl. Phy s. A 993\, 121646 (2020).\n\nhttps://events.sinp.msu.ru/event/8/contributi ons/553/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/553/ END:VEVENT BEGIN:VEVENT SUMMARY:Vorticity and helicity fields in heavy-ion collisions and hyperon polarization DTSTART;VALUE=DATE-TIME:20220713T143000Z DTEND;VALUE=DATE-TIME:20220713T145000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-526@events.sinp.msu.ru DESCRIPTION:Speakers: Nikita Tsegelnik (BLTP\, JINR\, Dubna)\nThe experime ntally observed significant polarization of $\\Lambda$ and anti-$\\Lambda$ particle in heavy-in collisions [1] lead to speculations that rapidly rot ating swirls are of nuclear matter are created [2]. We use the transport m odel PHSD to simulate the Au+Au and Pb+Pb collisions at NICA energies and perform the fluidization procedure determining density\, temperature\, and velocity fields created at different stages of the collisions. Vorticity and hydrodynamic helicity fields are calculated and visualized in dynamics . The velocity field is illustrated on the left panel in Fig.1. It looks d ominantly as the Hubble-like profiles expanding in transverse and longitud inal directions (approximate cylindrical symmetry). The small vorticity fi eld looks like a small perturbation on top of the longitudinal and transve rse flows. The vorticity field is shown on the right panel of Fig.1. We se e that two vortex (asymmetrical) rings moving in the opposite direction al ong the $z$-axes are formed. The PHSD model is proved to describe successf ully hyperon yields in the broad range of collision energies of our intere st. Therefore\, we can calculate the polarization of (anti-)hyperons on a dynamic freeze-out surface. The experimental polarization of $\\Lambda$ is well reproduced. However\, the anti-$\\Lambda$ polarization is underestim ated.\n\n![](https://events.sinp.msu.ru/event/8/abstracts/637/attachments/ 500/V3D-Au77-b75-t090-v3.png) ![](https://events.sinp.msu.ru/event/8/abstr acts/637/attachments/501/W3D-Au77-b75-t090-v3.png)\nFig. 1. Velocity and v orticity fields calculated within PHSD model for Au+Au collisions at $\\sq rt{s_{NN}}=7.7GeV$ for impact parameter $b=7.5fm$ at the time moment $t=7. 7fm/c$\n\n1. L. Adamczyk et al.\, Nature 548\, 62 (2017).\n2. H. Petersen\ , Nature 548\, 34 (2017).\n\nhttps://events.sinp.msu.ru/event/8/contributi ons/526/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/526/ END:VEVENT BEGIN:VEVENT SUMMARY:The role of parton distribution functions in the ϕ meson producti on in relativistic ion collisions DTSTART;VALUE=DATE-TIME:20220713T151000Z DTEND;VALUE=DATE-TIME:20220713T153000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-263@events.sinp.msu.ru DESCRIPTION:Speakers: Mariia Mitrankova (Peter the Great St.Petersburg Pol ytechnic University (SPbPU))\nLattice gauge QCD calculations predict phase transition from hadronic matter to deconfined state of quarks and gluons - quark-gluon plasma (QGP) - at a high temperature and energy density [1]. Minimal conditions of the QCD phase transition and QGP matter formation a re studied in relativistic small-system collisions [2]. One of the ways to investigate QGP properties in experiment is to measure the peculiarities of particles production [2]. Due to its characteristics\, the vector *ϕ* meson is considered as a good probe of the partonic matter formed in relat ivistic ion collisions [3].\n\nThe cross section of particle production in hard processes in the leading order QCD at the parton level is determined using nuclear parton distribution functions (nPDFs) [4-6]. These function s characterize the probability of a parton to have a certain fraction of t he nucleon momentum inside the ion at any scale of the square of the momen tum transfer in the interaction. The distributions are extracted from comp rehensive global analysis of hard scattering data from variety of fix-targ et and collider experiments in framework of pQCD. The implementing of vari ous sets of nPDF parameterizations [4-6] may help to interpret the experim ental results on particle production. \n\nThis report presents the compari son of *ϕ* meson production in *p*+Al\, *p*+Au\, *d*+Au\, and 3He+Au coll isions at √sNN = 200 GeV at midrapidity (|η|<0.35)\, measured at PHENIX [1]\, to PYTHIA/Angantyr\, PYTHIA+EPPS16\, and PYTHIA+nCTEQ15 nPDFs calcu lations. Model calculations are consistent with experimental data within u ncertainties. However\, at intermediate transverse momentum range\, PYTHIA /Angantyr\, PYTHIA+EPPS16\, and PYTHIA+nCTEQ15 calculations do not predict the ordering of *ϕ* meson production with the collision system size\, ob served in the experiment. Therefore\, *ϕ* meson production in *p*/ *d*/ 3 He+Au collisions at √sNN = 200 GeV might be driven by mechanisms additio nal to nPDF.\n\nWe acknowledge support from Russian Ministry of Education and Science\, state assignment for fundamental research (code FSEG-2020-00 24) in the *ϕ* meson production in 3He+Au collisions part of the analysis .\n\n1. K. Adcox et al. (PHENIX Collaboration)\, Nucl. Phys. A\, 757\, 184 (2005).\n2. M.M. Mitrankova et al. Phys. Scr. 96\, 084010 (2021).\n3. C.P . Singh\, Vivek Kumar Tiwari\, K.K. Singh\, Phys. Lett. B 393\, 188 (1997) .\n4. C. Bierlich\, G. Gustafson\, L. Lönnblad\, H. Shah\, JHEP 10\, 134 (2018).\n5. K.J. Eskola\, P. Paakkinen\, H. Paukkunen\, C.A. Salgado\, Eur . Phys. J. C 77\, 163 (2017).\n6. K. Kovark et al. Phys. Rev. D. 92\, 8\, 085037 (2016).\n\nhttps://events.sinp.msu.ru/event/8/contributions/263/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/263/ END:VEVENT BEGIN:VEVENT SUMMARY:Upgrade of Projectile Spectator Detector at NA61/SHINE experiment DTSTART;VALUE=DATE-TIME:20220712T151000Z DTEND;VALUE=DATE-TIME:20220712T153000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-300@events.sinp.msu.ru DESCRIPTION:Speakers: Sergey Morozov (INR RAS)\nProjectile Spectator Detec tor (PSD) is a sampling hadron calorimeter used in the NA61/SHINE experime nt to provide measurement of collision centrality and event plane reconstr uction independently from tracking detectors. The PSD consists of modules with longitudinal segmentation based on lead/scintillator layers with the sampling ratio 4:1. Light from scintillator plates is collected with WLS f ibers and each six consecutive scintillator plates are read out by one Ham amatsu MPPC placed at the end of the module. A fast analog signal from PSD modules allows to select events with required centrality on-line at the t rigger level. Performance of the PSD will be shown for the measurements at the energy range 13 – 150 AGeV.\n New physics program of NA61/SHINE ex periments beyond 2020 includes open charm measurements. Current beam rate has to be increased by an order of magnitude. This requires PSD upgrade to survive in new high radiation conditions and to have faster photodetector s and read-out electronics. Instead of the present PSD\, it is proposed to use two forward calorimeters. The first one is modified current PSD with constructed beam hole in the center and the second one is a new calorimete r with small transverse sizes placed downstream. Details of the PSD upgra de including simulation results of radiation conditions as well as results of the performance studies for new calorimeter system will be presented.\ n\nhttps://events.sinp.msu.ru/event/8/contributions/300/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/300/ END:VEVENT BEGIN:VEVENT SUMMARY:First results from CLAS12 on $\\pi^+\\pi^-p$ electroproduction in fully exclusive kinematic DTSTART;VALUE=DATE-TIME:20220714T124000Z DTEND;VALUE=DATE-TIME:20220714T125000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-314@events.sinp.msu.ru DESCRIPTION:Speakers: Anna Frolova (MSU\, Faculty of physics)\nStudies of the excited nucleon state spectrum and structure offer unique insight int o the dynamics of strong interaction in the regime of large QCD running co upling\, i.e. the regime of strong QCD. The experimental program at Hall B in Jefferson Laboratory with the CLAS detector using electron and photon beams has provided the first and only available in the world results on electroexcitation amplitudes ($\\gamma_vpN^*$ electrocouplings) for the m ost resonances in the mass range up to 1.8 GeV and photon virtuality up to $Q^2<5.0$ GeV${}^2$. Expertiments with the CLAS12 detector will extend ou r knowledge on the N* spectra\, in particular\, in the mass range above 2. 0 GeV. Studies of $\\pi^+\\pi^-p$ electroproduction represent an importan t part of these efforts. The first results of studying this complex electr oproduction channel will be outlined in the talk.\n \nThe analysis of the 6.5 GeV data set obtained by Run Group-K (RG-K) will be presented. The $\ \pi^+\\pi^-p$ channel’s event selection has been performed in accordance with the RG-K’s general procedures. Using Monte Carlo simulation severa l further selections on different kinematic variables have been developed which allowed to observe resonance structures in the missing mass distribu tions.\n\nThe expected results will allow us to explore the spectrum of hi gh-lying resonances contributing to the $\\pi^+\\pi^-p$ electroproduction including the search for predicted in quark models but still not observed in experiments so-called "missing" resonances and the new expected states of hadron matter\, so-called hybrid baryons with glue as an active structu ral component.\n\nhttps://events.sinp.msu.ru/event/8/contributions/314/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/314/ END:VEVENT BEGIN:VEVENT SUMMARY:Femtoscopic probes in collisions of small and large systems from S TAR DTSTART;VALUE=DATE-TIME:20220712T074000Z DTEND;VALUE=DATE-TIME:20220712T080000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-303@events.sinp.msu.ru DESCRIPTION:Speakers: Grigory Nigmatkulov ()\nOne of the goals of ion-ion collision studies is to understand mechanism of particle production and re veal the properties of particle-emitting source. A quark-gluon matter\, pr oduced in collisions of relativistic heavy ions at high energies ($\\sqrt{ s_{NN}}\\ge$62.4 GeV)\, undergoes a rapid transition to the hadronic matte r known as crossover [1]. At lower collision energies it is expected that the phase transition will be of the first order [2] that also implies an e xistence of the critical point [3]. The change of phase transition type ma y be imprinted on the spatial and temporal properties of the particle-emit ting source. The correlation femtoscopy method\, based on the measurement of two-particle momentum correlations arising due to the quantum statistic al correlations\, is designed to access space-time extents of the fireball [4]. In addition to the large collision systems\, it is also important to obtain the information about the particle production mechanism in small c ollision systems.\n \nIn this talk\, we report the results of the two-part icle femtoscopic correlations measured in collisions of small and large sy stems (including p+Au and Au+Au) from the STAR experiment at RHIC. The phy sics implications will be discussed.\n\nReferences:\n[1] Abdallah M.S.\, e t al. Measurement of the sixth-order cumulant of net-proton multiplicity d istributions in Au+Au collisions at in Au+Au collisions at √sNN = 27\, 5 4.4\, and 200 GeV at RHIC\, Phys. Rev. Lett. - 2021. - V. 127. - P. 262301 .\n[2] Ejiri\, S. Canonical partition function and finite density phase tr ansition in lattice QCD\, Phys. Rev. D. - 2008. - V. 78. - P. 074507.\n[3] Stephanov\, M. QCD phase diagram and the critical point\, Prog. Theor. Ph ys. Suppl. - 2004. - V. 153. - P. 139.\n[4] Lisa M.A. et al. Femtoscopy in relativistic heavy ion collisions: two decades of progress\, Annu. Rev. N ucl. Part. Sci. – 2005. – V.55. – P.357.\n\nhttps://events.sinp.msu. ru/event/8/contributions/303/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/303/ END:VEVENT BEGIN:VEVENT SUMMARY:A method of calculating the electric field map of triple GEM detec tor for the first physics run of BM@N experiment DTSTART;VALUE=DATE-TIME:20220714T151000Z DTEND;VALUE=DATE-TIME:20220714T153000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-493@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitry Baranov ()\nBM@N (Baryonic Matter at Nuclotro n) [1] is the first stage experiment which is carried out at the NICA (Nu clotron-based Ion Collider fAсility) accelerator complex [2] located at J oint Institute for Nuclear Research in Dubna. The main purpose of the expe riment is to study dense baryonic matter as a product of heavy ion collisi ons. \n\nThis work concentrates on the features of simulation for the co re BM@N tracking detector based on triple GEM (Gas Electron Multiplier) sy stem [3]. In particular\, we will describe in detail the preparation of el ectric field map needed for detailed simulation of this detector. We will review the main steps of the field map preparation based on using special software such as GMSH [4]\, Elmer [5] and Garfield++ [6]: toolkits for fin ite element mesh generation\, electric field calculation and simulation of physics processes in gaseous and semiconductor detectors. \n\nOur computa tions are based on the particular conditions and properties of GEM chamber s used in the first physics experimental run that scheduled to be performe d in 2022. The principal difference of the future run from the previous is in their purposes. The previous runs\, being focused on testing detector facilities\, were mainly technical but the new ones are aimed to get some physics results that had been claimed in the scientific program of the BM @N experiment.\n\n1. BM@N Conceptual Design Report: http://nica.jinr.ru/fi les/BM@N/BMN_CDR.pdf\n2. NICA White Paper. http://theor0.jinr.ru/twiki-cgi /view/NICA/NICAWhitePaper\n3. D. Baranov et al.\, JINST\, 12\, C06041 (201 7)\n4. GMSH resource: http://gmsh.info\n5. Elemer resource: http://www.csc .fi/fi/web/elmer\n6. Garfield++ resource: https://gitlab.cern.ch/garfield/ garfieldpp\n\nhttps://events.sinp.msu.ru/event/8/contributions/493/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/493/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the timing resolution of scintillation detectors sa mples of a future time-of-flight neutron detector for the BM@N experiment DTSTART;VALUE=DATE-TIME:20220715T120000Z DTEND;VALUE=DATE-TIME:20220715T122000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-574@events.sinp.msu.ru DESCRIPTION:Speakers: Aleksandr Makhnev (INR RAS)\nA new compact time-of-f light neutron detector is planned to be developed and produced. This detec tor will identify and measure the energies of neutrons produced in nucleus -nucleus collisions at energies up to 4 AGeV in the BM@N experiment at the Nuclotron (JINR\, Dubna). The detector will be used to measure neutron yi elds and azimuthal neutron flows\, which should be sensitive to the equati on of state of dense nuclear matter and to the energy of symmetry\, as it is shown in various theoretical models. \nThe novelty of the proposed neut ron detector is the usage of small scintillators with an area of about 10- 20 cm2 and a thickness of 25 mm as sensitive elements for the active layer s of the detector. One silicon multipixel photon counter with a sensitive area of 6 x 6 mm2 is proposed to perform light readout from one of the sid es of each of these scintillators. To achieve the required neutron energy resolution\, the detector timing resolution of 100-150 ps is required.\nTh e concept of the proposed time-of-flight neutron detector\, the possibilit ies of its layout on the BM@N\, as well as the results of the timing resol ution measurements of the samples of scintillation detectors on cosmic muo ns for different types of scintillators\, sizes\, reflectors and photon co unters are discussed.\n\nhttps://events.sinp.msu.ru/event/8/contributions/ 574/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/574/ END:VEVENT BEGIN:VEVENT SUMMARY:Model study of the energy dependence of the correlation between an isotropic flow and the mean transverse momentum in Au+Au collisions DTSTART;VALUE=DATE-TIME:20220712T130000Z DTEND;VALUE=DATE-TIME:20220712T132000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-322@events.sinp.msu.ru DESCRIPTION:Speakers: Petr Parfenov (NRNU MEPhI)\nOne of the key goals of the heavy-ion programs is to study the transport properties of the quark-g luon plasma (QGP) forming in the collisions of two nuclei\, such as the sp ecific shear viscosity η/s as a function of temperature T and baryon chem ical potential μB. The precise extraction of such parameters may present a certain difficulties. To strengthen the constraints for η/s(T\, μB) th e modified Pearson correlation coefficient ρ(v22\,[pT]) between the avera ge transverse momentum [pT] and square of the elliptic flow coefficient v2 2 might be employed.\nIn this work\, sensitivity of the correlation coeffi cient ρ(v22\,[pT]) to the attenuation effects of the specific shear visco sity and the initial-state geometry of the collisions is studied using the UrQMD+vHLLE hybrid model to simulate Au+Au collisions. Measurements of th e correlation between v22 and [pT] could aid precision extraction of η/s( T\, μB) from the experimental data available at RHIC.\n\nhttps://events.s inp.msu.ru/event/8/contributions/322/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/322/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for new physics in the dilepton channel with the CMS det ector at the LHC DTSTART;VALUE=DATE-TIME:20220712T122000Z DTEND;VALUE=DATE-TIME:20220712T124000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-366@events.sinp.msu.ru DESCRIPTION:Speakers: Ilia Zhizhin (JINR)\nSearch for physics beyond the s tandard model using resonant and nonresonant models in dilepton channel ha s been performed using Run 2 data with integrated luminosity 140 fb-1 in p roton-proton collisions at √s=13 TeV with the CMS experiment at the LHC. \nA good agreement with the predictions of the standard model is found\, n o significant deviations are observed.\nLimits on the parameters of the co nsidered models are reported.\n\nhttps://events.sinp.msu.ru/event/8/contri butions/366/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/366/ END:VEVENT BEGIN:VEVENT SUMMARY:Nπ electroproduction in the resonance region in 12 GeV era DTSTART;VALUE=DATE-TIME:20220714T122000Z DTEND;VALUE=DATE-TIME:20220714T124000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-328@events.sinp.msu.ru DESCRIPTION:Speakers: Anna Golubenko (Skobeltsyn Institute of Nuclear Phys ics (SINP MSU))\nStudies of single pion electroproduction off protons is t he major source of information on the spectrum and structure of nucleon re sonances (N*) located in the mass range of W<2.0 GeV which decay preferent ially to the Nπ final states [1]. Experimental data from CLAS on the excl usive pπ0\, nπ+ electroproduction channels already provided unique infor mation on N* electroexcitation amplitudes at photon virtualities Q2<5.0 Ge V2 [2]. The analysis of the electroexcitation amplitudes of Δ(1232)3/2+\, N(1440)1/2+\, and Δ(1600)3/2+ resonances within the framework of Dyson -Schwinger equation approach (DSE) demonstrated the possibility of gaining insight into emergence of hadron mass (EHM) [3].\n The new CLAS12 [3] det ector is only available in the world facility capable of extending the kno wledge on N* electroexcitation amplitudes in the mass range up to W<3.0 Ge V and at still almost unexplored range of highest Q2 ever achieved up to 1 0 GeV2. The first results on π0p electroproduction studies with the CLAS1 2 detector will be presented in the talk. The expected results on unpolari zed differential cross sections as well as on beam spin asymmetries will p rovide the important information needed for extraction of the transition h elicity amplitudes for most prominent in π0p channel excited states of th e nucleon at Q2<10 GeV2. Analysis of these results within DSE will allow u s to map out momentum dependence of dressed quark mass within the essentia l range of distances where the dominant part of hadron mass is expected to be generated shedding light on one of the most challenging and still open problem of the Standard Model on emergence of hadron mass and quark gluon confinement from QCD.\n\n1 I.G. Aznauryan and V. D. Burkert\, Prog. Part . Nucl. Phys. 67\, 1 (2012).\n2. D.S. Carman\, K. Joo\, and V.I. Mokeev\, Few Body Syst. 61\, 29 (2020).\n3.S.J. Brodsky et al\, Int. J. of Mod. Phy s. E29 203006 (2020)\n4. V.D. Burkert\, L. Elouadrhiri\, K.P. Adhikari et al. Nuclear Inst. and Methods in Physics Research\, A 959\, 163419 (2020) .\n\nhttps://events.sinp.msu.ru/event/8/contributions/328/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/328/ END:VEVENT BEGIN:VEVENT SUMMARY:High-performance optimization of the software for experimental dat a decoding in BM@N NICA experiment DTSTART;VALUE=DATE-TIME:20220714T145000Z DTEND;VALUE=DATE-TIME:20220714T151000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-330@events.sinp.msu.ru DESCRIPTION:Speakers: Sergei Nemnyugin (Saint-Petersburg State University) \nIn the BM@N (Baryon Matter at Nuclotron) experiment at NICA accelerator complex in Joint institute for Nuclear Research (Dubna\, Russia) study of collisions of isospin symmetric nuclei with fixed targets is performed [1] . Efficient software environment plays key role in the BM@N experimental p rogram. The BmnRoot software package is used for both simulation and event reconstruction of simulated and experimental data. Special attention is t o the BmnRoot performance optimization [2]. The present report is devoted to performance optimization of the experimental data decoding module of th e BmnRoot software package. Most time-consuming hotspots of the decoder ha ve been localized. Vectorization of these hotspots improved performance of most time-consuming decoder functions by 1.25-2 times. As a consequence\, total time of execution is improved by 15-20%. Quality assurance demonst rated correctness of optimization.\n\n1. D. Baranov\, M. Kapishin\, T. Mam ontova\, G. Pokatashkin\, I. Rufanov\, V. Vasendina\, and A. Zinchenko\, “The BM@N experiment at JINR: Status and physics program” in Proceedin gs of the 3rd International Conference on Particle Physics and Astrophysic s (ICPPA)\, Moscow\, Russia\, 2017\, Ed. by P. Zarubin\, I. Selyuzhenkov\, and A. Taranenko (Moscow\, 2018)\, pp. 291—296.\n2. A.V.Driuk\, A.A.Iuf riakova\, N.E.Kakhanovskaya\, K.I.Mashitsin\, S.P.Merts\, S.A.Nemnyugin\, V.A.Roudnev. Development and Software Implementation of Optimal Algorithms for Event Reconstruction\, Evaluation of the Quality of Event Reconstruct ion and Simulation of Detector Components in the BM@N Experiment. Physics of Particles and Nuclei\, 2021\, v. 52. Iss. 4\, pp. 808–816.\n\nhttps:/ /events.sinp.msu.ru/event/8/contributions/330/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/330/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of NCQ scaling of elliptic and triangular flow for identifie d hadrons in Au+Au collisions at $\\sqrt{s_{NN}} = 11.5 - 200$ GeV DTSTART;VALUE=DATE-TIME:20220712T080000Z DTEND;VALUE=DATE-TIME:20220712T082000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-354@events.sinp.msu.ru DESCRIPTION:Speakers: Aleksandr Demanov (NRNU MEPhI)\nA main purpose of Be am Energy Scan experiments is to study the properties of the Quark-Gluon- Matter (QGM) forming in the collisions of two nuclei. Anisotropic flow of produced particles is one of the important observables sensitive to the t ransport properties of the QGM created in relativistic heavy-ion collision s. Anisotropic flow of identified particles measured in Au + Au collision s at top RHIC energy $\\sqrt{s_{NN}} = 200$ GeV exhibits a remarkable NCQ scaling with number of constituent quarks and transverse kinetic energy.\n In this work\, we report on the calculations of elliptic (v2) and triangu lar (v3) flow of identified charged hadrons produced in Au+Au collisions at 11.5 −200 GeV from several state of the art models and provide the direct comparison with published results from RHIC BES experiments.\nFurt her insights about the mechanism of NCQ scaling of anisotropic flow will b e discussed.\n\nhttps://events.sinp.msu.ru/event/8/contributions/354/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/354/ END:VEVENT BEGIN:VEVENT SUMMARY:Systematics of reaction plane determination with the MPD experimen t. DTSTART;VALUE=DATE-TIME:20220714T122000Z DTEND;VALUE=DATE-TIME:20220714T124000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-362@events.sinp.msu.ru DESCRIPTION:Speakers: Valerii Troshin (National Research Nuclear Universit y MEPhI\, Moscow\, Russia)\nStudying the equation of state of strongly int eracting matter is one of the main goals of the Multi Purpose Detector (MP D) experiment at the future NICA facility. Among the important observables in this study is final state momentum anisotropy relative to collision sy mmetry plane described with anisotropic transverse flow coefficients. This work addresses the systematics of participant and spectator symmetry plan e estimation using different methods and subsystems of the MPD experiment and taking into account effects of azimuthal acceptance non-uniformity. Th e study is based on Monte Carlo simulations of MPD detector response to th e particles resulting from Bi+Bi collisions at $\\sqrt{S_{NN}}$=9.2 GeV produced with the DCM-QGSM-SMM event generator. The latter is characterize d by realistic yields of spectator fragments allowing to obtain signals in Forward Hadron Calorimeters (FHCal) close to those expected in the real d ata.\n\nhttps://events.sinp.msu.ru/event/8/contributions/362/ LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/362/ END:VEVENT BEGIN:VEVENT SUMMARY:READOUT ELECTRONICS FOR THE WIDE APERTURE SILICON TRACKING SYSTEM OF THE BM@N EXPERIMENT AT NICA DTSTART;VALUE=DATE-TIME:20220715T130000Z DTEND;VALUE=DATE-TIME:20220715T132000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-365@events.sinp.msu.ru DESCRIPTION:Speakers: Mikhail Shitenkov (JINR VBLHEP)\nBM@N experiment at NICA in Dubna is currently being upgraded for the study of dense nuclear m atter in heavy-ion collisions. One of the major upgrades is a new hybrid t racking system consisting of the large-area Silicon Tracking System (STS) and seven GEM planes [1]. STS is based on the modules with double-sided mi crostrip silicon sensors of CBM-type. The data driven acquisition system o f STS is relying on self-triggering readout channels and data processing c hain is adopted for the operation with BM@N trigger [2]. \nThe core compon ents of the readout chain are Front-end Boards (FEB)\, GBTxEmulator board and GBTxEmulator Readout Interface (GERI) board. The front-end board is an integrated part of the STS module. The main components of FEB are eight S TS-XYTER ASICs which are needed for the readout of one side of the silicon sensor. The GBTxEmulator board based on FPGA which emulates functionality of the CERN GBTx ASIC [3] and provides a bidirectional optical link betwe en front-end electronics and data processing boards in the server nodes. T he GERI board concentrates and pre-processes the data stream\, filters th e data according to the BM@N trigger signals and provides an interface to configuration and control of the readout electronics.\nFor the needs of i ntegration into the global BM@N DAQ a trigger-based data filtering was dev eloped and implemented. Methods of integration and synchronization of the STS readout chain with the common data acquisition system BM@N experiment are described.\nFront-end electronics\, electrical connections\, data conc entrator and architecture of data processing board are described in the re port. The results of testing of a pilot version of the readout chain are p resented. \nWork is supported by RFBR 18-02-40047 grant.\n\n1. The BM@N ST S group\, "The Silicon Tracking System as Part of the Hybrid Tracker of th e BM@N Experiment: Technical Design Report"\, JINR\, Dubna\, 2020\, ISBN 9 78-5-9530-0541-8.\n2. D. Dementev\, M. Guminski\, I. Kovalev\, M. Kruszews ki\, I. Kudryashov\, A. Kurganov et al.\, FastData-Driven Readout System f or the Wide Aperture Silicon Tracking System of the BM@N Experiment\, Phys ics of Particles and Nuclei 52 (2021) 830.\n3. P. Moreira et al.\, “GBTX manual.” https://espace.cern.ch/GBT-Project/GBTX/Manuals/gbtxManual.pdf [Online\; accessed 22-September-2021]\, 2018.\n\nhttps://events.sinp.msu. ru/event/8/contributions/365/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/365/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for Long-Lived Particles in CMS experiment DTSTART;VALUE=DATE-TIME:20220712T124000Z DTEND;VALUE=DATE-TIME:20220712T130000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-371@events.sinp.msu.ru DESCRIPTION:Speakers: Vladislav Shalaev (JINR\, Dubna State University)\nM any models beyond the standard model predict new particles with long lifet imes\, such that the position of their decay is measurably displaced from their production vertex. We present recent results of searches for long-li ved particles obtained using data recorded by the CMS experiment at the LH C\n\nhttps://events.sinp.msu.ru/event/8/contributions/371/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/371/ END:VEVENT BEGIN:VEVENT SUMMARY:Online data processing and monitoring of the BM@N experiment DTSTART;VALUE=DATE-TIME:20220715T132000Z DTEND;VALUE=DATE-TIME:20220715T134000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-385@events.sinp.msu.ru DESCRIPTION:Speakers: Ilnur Gabdrakhmanov (JINR VBLHEP)\nThe BM@N (Baryoni c Matter at Nuclotron) experiment is the fixed target experiment and the f irst stage of the NICA (Nuclotron-based Ion Collider fAсility) accelerato r complex located in the Joint Institute for Nuclear Research in Dubna. Th e experimental facility is designed to explore properties of dense strongl y interacting matter in heavy ion collisions.\nThe data decoding and event reconstruction algorithms are being developed as part of the BmnRoot on t op of the FairRoot framework – a ROOT program package developed primaril y for the FAIR experiment. The monitoring system’s frontend is based on the CERN jsROOT library. The online data processing pipeline is organized as several processes exchanging data via the ZeroMQ sockets. This approach makes the system flexible and easier to add new elements to the system as well as distribute calculation on several nodes. Also it is more conveni ent to monitor experiment by a distributed team. The QA system allows user s to select reference run from past runs and impose it on the current run in order to detect possible deviations in the histograms.\nOne of the cruc ial parts of data processing is the signal filtering in the strip detector subsystems such as Gas Electron Multipliers (GEM)\, silicon strip detecto rs and Cathode Strip Chambers (CSC). They constitute inner tracker – th e key part for track reconstruction. The decoding workflow includes iterat ive filtration\, executing noise reduction.\n\nhttps://events.sinp.msu.ru/ event/8/contributions/385/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/385/ END:VEVENT BEGIN:VEVENT SUMMARY:Geant4 FTF Model Description of the NA61/SHINE Collaboration Data on Strange Particle Production in pp-interactions DTSTART;VALUE=DATE-TIME:20220712T132000Z DTEND;VALUE=DATE-TIME:20220712T134000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-414@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Uzhinskii (Joint Institute for Nuclear Rese arch (JINR))\nGeant4 FTF Model Description of the NA61/SHINE Collaboration Data on Strange Particle Production in pp-interactions\n\n A. Ga loyan and V. Uzhinsky\n Joint Institute for Nuclear Research\, Dubna\, Rus sia\n E-mail: uzhinsky@jinr.ru \n\n Geant4 is the well-known package f or simulation of particle penetration in matter which is used in many high energy experiments. There is FTF (Fritiof) model in Geant4. The FTF model is responsible for simulations of elementary interactions. We compare the FTF model results on inclusive distributions of Λ\, K0s\, Ξ-\, anti-Ξ+ and K*(892)0 produced in pp interactions at Plab=158 GeV/c recently measu red by the NA61/SHINE collaboration. It is found that for a good descripti on of the K*(892)0 mesons it is needed to set up the ratio of pseudo-scala r to vector meson probability as 0.4/0.6 in a production. A description o f the Ξ- and anti-Ξ+ hyperons requires a special treatment of fragmentat ion of anti-diquark – diquark strings with low masses\, and an additiona l tuning of quark and diquark fragmentation functions. With all of these\, we reproduce Λ and K0s spectra well. It is the best model description of the strange particle production in the literature. The collaboration coul d not be able to describe its data using the EPOS 1.99 model.\n\nhttps://e vents.sinp.msu.ru/event/8/contributions/414/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/414/ END:VEVENT BEGIN:VEVENT SUMMARY:EFFECTS OF LOCAL PARITY NONCONSERVATION IN STRONG INTERACTIONS IN Pb-Pb COLLISIONS AT LHC ENERGY DTSTART;VALUE=DATE-TIME:20220715T141000Z DTEND;VALUE=DATE-TIME:20220715T143000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-417@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Kovalenko (St. Petersburg State University) \nIt is known that the global conservation of spatial parity is a well-est ablished symmetry of strong interactions. So far\, no pieces of evidence h ave been found for P- and CP-symmetry breaking in strong interactions.\nHo wever\, QCD does not forbid local breaking of parity symmetry due to large topological fluctuations at high temperature with dynamical generation of configurations of nontrivial topological charge. The necessary condition for the observation of these effects is a sufficiently long lifetime of ho t bubble which is accessible in central nucleus-nucleus collisions at LHC. \nIt was shown that the effect of local non-conservation of parity in stro ng interactions can be checked experimentally by the angular analysis of l ow-mass dilepton production in heavy-ion collisions [1-3] and by search of light hadron decays in specific channels which are forbidden by global pa rity conservation [4\,5]. Pariaturly\, the decays of scalar charged a0 mes on into a photon and charged pion and into three charged pions can be refe rred to such processes.\nIn this work\, the effects of local parity non-co nservation have been implemented in the Monte Carlo realisation of the the rmal model. The predictions of the invariant mass distributions of di-meso ns and di-electrons are obtained in Pb-Pb collisions at LHC energy\, takin g into account the experimental resolution of the detectors. It is shown t hat the upgrade of the ALICE detector during the Long Shutdown 2 significa ntly improves the feasibility of these experimental studies at the LHC Run 3 [6].\n\nThe study was funded by the Russian Science Foundation grant No .\n22-22-00493\, https://rscf.ru/project/22-22-00493\n\nhttps://events.sin p.msu.ru/event/8/contributions/417/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/417/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the mPSD response in O+Ni collisions at 2 AGeV at the mCB M DTSTART;VALUE=DATE-TIME:20220715T124000Z DTEND;VALUE=DATE-TIME:20220715T130000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-425@events.sinp.msu.ru DESCRIPTION:Speakers: Nikolay Karpushkin (INR RAS)\nThe PSD forward hadron calorimeter will be used to determine the collision geometry at the CBM e xperiment\, which is under construction at FAIR. To test the CBM subsystem s\, the mCBM experiment was started at the SIS18 beamline of GSI as a part of the FAIR Phase-0 program. One of the PSD modules (mPSD) equipped with the free-streaming readout electronics has been installed and tested at th e mCBM in nucleus-nucleus collisions at interaction rates up to 5 MHz. In this report\, the first experimental results of the mPSD response in the O +Ni collisions at a kinetic energy of 2A GeV are discussed and compared to simulated data of DCM-QGSM-SMM model.\n\nhttps://events.sinp.msu.ru/event /8/contributions/425/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/425/ END:VEVENT BEGIN:VEVENT SUMMARY:SOLITON SOLUTIONS OF HYDRODYNAMIC EQUATIONS IN DESCRIBING COLLISIO NS AND OSCILLATIONS OF ATOMIC NUCLEI DTSTART;VALUE=DATE-TIME:20220714T124000Z DTEND;VALUE=DATE-TIME:20220714T130000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-426@events.sinp.msu.ru DESCRIPTION:Speakers: Alexander Dyachenko (Petersburg State Transport Univ ersity)\nA.T. D’yachenko$^{1\,2}$\, I. A. Mitropolsky$^{2}$\n$^{1}$*Empe ror Alexander I Petersburg State Transport University\, St. Petersburg\, Russia\;* \n$^{2}$*B.P. Konstantinov Petersburg Nuclear Physics\, Institu te\, National Research Center “Kurchatov Institute”\, Gatchina\, Russi a*\n E-mail: dyachenko_a@mail.ru \n\nIn the present work\, the hydrodynami c approach is used and the distribution function of particles in complex s ystems is found. Within the framework of our approach\, we have found an a nalytical solution of the equations of hydrodynamics in the soliton approx imation for the collision of layers in the one-dimensional and two-dimensi onal cases. The prospects of the hydrodynamic approach in physics and the importance of taking into account nonequilibrium processes are noted. The compression stage\, the expansion stage\, and the freeze-out stage are con sidered within the framework of a single formula for layers with energies on the order of ten MeV per nucleon. Such a reduction of solutions of hydr odynamic equations to soliton solutions has not been considered before.\n\ nThe introduction of dispersion into the effective forces and into the pre ssure does not violate the concept of the formation of a hot spot. The int roduction of additional dimensions does not violate this representation. U sually the solution of this system of non-linear partial differential equa tions is found numerically on a computer. Here we develop an approach to t he approximate analytical solution of these equations\, both in the case o f weak nonlinearity\, by reducing them to the Korteweg-de Vries equations\ , and in the case of large-amplitude perturbations\, using soliton-like so lutions. Our generalization to the two-dimensional case leads to the idea of the formation of a rarefied bubble region at the stage of expansion. An d the approach itself is of independent interest and can be used in other areas of physics when calculating the nonlinear dynamics of oscillations o f complex systems. In our works [1-4]\, it was shown that the local thermo dynamic equilibrium in the process of collisions of heavy ions is not esta blished immediately. For this purpose\, in this work\, we use the result o f solving the kinetic equation to find the nucleon distribution function\, which at low energies leads to the equations of nonequilibrium long-range hydrodynamics [1]. The non-equilibrium approach to hydrodynamic equations makes it possible to describe experimental data better than the equation of state corresponding to traditional hydrodynamics\, which assumes the es tablishment of local thermodynamic equilibrium.\n\n1. A.T. D’yachenko\, K.A. Gridnev\, and W. Greiner\, J. Phys. G40\, 085101 (2013). \n2. A.T. D ’yachenko\, I.A. Mitropolsky\, Phys. Atom. Nucl. 83\, 558 (2020).\n3. A .T. D’yachenko\, I.A Mitropolsky \, Bull. Russ. Acad. Sci. Phys. 84\, 391 (2020).\n4. A.T. D’yachenko\, I.A. Mitropolsky\, Bull. Russ. Acad. Sci. Phys. 85 \, 554 (2021).\n\nhttps://events.sinp.msu.ru/event/8/contri butions/426/ LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/426/ END:VEVENT BEGIN:VEVENT SUMMARY:Diphoton Production Rate with the Effect of Chemical Potential in Relativistic Heavy-Ion Collisions DTSTART;VALUE=DATE-TIME:20220715T103000Z DTEND;VALUE=DATE-TIME:20220715T105000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-429@events.sinp.msu.ru DESCRIPTION:Speakers: Yogesh Kumar (Deshbandhu College\, University of Del hi\, Kalkaji\, New Delhi)\nWe investigate the production of diphotons from the hot and dense matter of quark-gluon plasma. The emission of diphotons is one of the most important electromagnetic signatures from quark-gluon plasma\, experiments on which are still in progress at Large Hadron Collid er (LHC) and Relativistic Heavy-Ion Collider (RHIC). For the same purpose\ , we employ a quasi-particle model containing quarks and gluons. Instead o f the earlier used dynamical quark mass\, we take into account the paramte rization factors in temperature-dependent quark mass which rises due to th e interaction of these quarks in extremely hot and dense state of quark-gl uon plasma. In addition\, a finite chemical potential is considered in our phenomenological model. We show the diphoton emission mass spectra in QGP and compare it with the diphoton production from hadronic gas at high tem peratures and finite chemical potential. Our results contribute to further understanding of diphotons which is useful in the study of quark-gluon pl asma and heavy-ion collision experiments at LHC and RHIC.\n\nhttps://event s.sinp.msu.ru/event/8/contributions/429/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/429/ END:VEVENT BEGIN:VEVENT SUMMARY:Source velocity in collisions of 2.1 GeV protons with gold target DTSTART;VALUE=DATE-TIME:20220714T140900Z DTEND;VALUE=DATE-TIME:20220714T142900Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-486@events.sinp.msu.ru DESCRIPTION:Speakers: Sergej Avdeyev (JINR)\nOne way of evaluating the deg ree of equilibration in reaction\, as well as determine the average source velocity\, is through invariant cross section analysis as a function of l ongitudinal and transverse velocity. \nIn the present work the source char acteristics of multifragmentation are investigated for the p + Au collisio ns at 2.1 GeV. Beam of 2.1 GeV protons were obtained from the Dubna superc onducting accelerator NUCLOTRON. Invariant cross sections of carbon fragme nts from target spectator were measured with the 4π device FAZA. \n It wa s found to a good approximation that the data for a given invariant cross section are isotropic\; i.e.\, they can be described by a circle with fixe d locus\, corresponding to a single average source velocity. Mean source v elocity of target spectator is 0.0032 ± 0.0003 in units of light speed. T he research was supported by the Russian Foundation for Basic Research\, G rant No. 19-02-00499.\n\nhttps://events.sinp.msu.ru/event/8/contributions/ 486/ LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/486/ END:VEVENT BEGIN:VEVENT SUMMARY:Role of string fusion mechanism in fluctuation studies DTSTART;VALUE=DATE-TIME:20220715T145000Z DTEND;VALUE=DATE-TIME:20220715T151000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-467@events.sinp.msu.ru DESCRIPTION:Speakers: Daria Prokhorova (St.Petersburg State University)\nI n the search for the critical point of strongly interacting matter\, one o f the key tools is to look at event-by-event fluctuations of different eve nt observables expecting their non-monotonic behavior. It is crucial for t he experiments to eliminate a possible influence of so-called trivial volu me fluctuations on the physics observables of interest. This may be done e .g. by the accurate centrality selection used and/or by means of special m easures using different estimators of initial conditions. It is also possi ble to apply some theoretical approaches in estimation of all the possible sources of unwanted fluctuations. In this report we compare results obtai ned in two phenomenological models of particle production. The first one i s the Monte-Carlo model of interacting quark-gluon strings of finite lengt h in rapidity space [1]. It takes into account\, event-by-event\, the stri ng fusion phenomenon caused by string overlap in the transverse plane. It is this process of fusion that modifies string fragmentation characteristi cs and changes the mean values of multiplicities and transverse momenta of produced particles. The second one is the modified multi-pomeron exchange model [2\,3] that takes into account\, in the effective way\, the process of string fusion emerging with the increase of collision energy. Using th ese models and Monte-Carlo event generators\, the calculations were done f or the strongly intensive quantities [4] Δ[PT\,N] and Σ[PT\,N] and the c ombinants [5] of multiplicity distribution. Results are discussed.\n \nAc knowledgements. This research has been conducted with financial support fr om St. Petersburg State University (project No 93025435).\n\n1. D.S. Prokh orova and V.N. Kovalenko\, Phys. Part. Nucl. 51\, 323 (2020).\n2. N. Armes to\, D.A. Derkach and G.A. Feofilov\, Phys. Atom. Nucl. 71\, 2087 (2008).\ n3. E.V. Andronov and V.N. Kovalenko\, Theor. Math. Phys. 200 3\, 1282 (20 19).\n4. M. Gorenstein and M. Gazdzicki\, Phys. Rev. C 84\, 014904 (2011). \n5. M. Rybczynski\, G. Wilk and Z. Wlodarczyk\, Phys. Rev. D 99 9\, 09404 5 (2019).\n\nhttps://events.sinp.msu.ru/event/8/contributions/467/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/467/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of neutral pion production in Ag+Ag collisions at 1.23 AGeV beam energy at the HADES experiment DTSTART;VALUE=DATE-TIME:20220712T141000Z DTEND;VALUE=DATE-TIME:20220712T143000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-487@events.sinp.msu.ru DESCRIPTION:Speakers: Arseniy Shabanov ()\nThe High Acceptance DiElectron Spectrometer (HADES) is a fixed target experiment which explores the prope rties of hadronic matter in collisions of pions\, protons and ions with va rious nuclei at beam energies 1-2 A GeV. It operates at the SIS18 accelera tor in GSI\, Darmstadt. Due to the newly built electromagnetic calorimeter ECal the HADES has a possibility to measure yield of the neutral pions vi a π0 → γγ decay. These measurements play an important role in reducin g the systematic uncertainties in study of dilepton spectra.\nThe analized data were collected in Ag + Ag collisions at the beam energy 1.23 A GeV. The events with centrality 0-30 % were chosen for the analysis. The proced ure of measurement of π0 yield and its uncertainty are discussed in this talk. The calibration of the ECal detector\, acceptance and efficiency cor rections and extrapolation of the pt and y spectra will be discussed.\n\nh ttps://events.sinp.msu.ru/event/8/contributions/487/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/487/ END:VEVENT BEGIN:VEVENT SUMMARY:Elliptic flow for π0 mesons in asymmetric Cu+Au collis ion system at √sNN=200 GeV DTSTART;VALUE=DATE-TIME:20220713T120000Z DTEND;VALUE=DATE-TIME:20220713T122000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-484@events.sinp.msu.ru DESCRIPTION:Speakers: Egor Bannikov (Peter the Great St.Petersburg Polytec hnic University (SPbPU))\nQuark-gluon plasma (QGP) is a state of nuclear m atter\, where quarks and gluons are deconfined [1]. It can be formed in la boratory conditions in collisions of heavy ions at high energies [2]. Elli ptic flow (v2)\, which reflects azimuthal anisotropy of hadron production in heavy ion collisions\, is one of the main observables characterizing pr operties of QGP [3]. The study of the elliptic flow in relativistic heavy ion collisions (Cu+Cu and Au+Au) leads to the assumption that the QGP beha ves as a nearly inviscid fluid [4]. The measurements of the v2 in Cu+Au as ymmetric collision system allow to determine the dependence of the ellipti c flow for light hadrons on the initial geometry of the system [5]. Since π0 meson consists of the first-generation quarks (u\, d)\, its production is well-measurable up to high values of pT. Thus\, the measurement of π0 meson v2 in Cu+Au collisions is considered as an effective tool to study QGP’s properties. \nIn symmetric collision systems such as Cu+Cu and A u+Au the scaling of elliptic flow values v2 for π0 mesons with the partic ipant nucleon eccentricity (ε2) and with the third root of the number of participant nucleons (Npart1/3) in all centrality classes was observed [6] . Such scaling could be interpreted in the frame of relativistic hydrodyna mic model\, considering QGP formation [7]. The observation of ε2 Npart1/3 scaling in asymmetric Cu+Au collision system could lead to a conclusion t hat v2/(ε2 Npart1/3) values for π0 mesons do not depend on the initial g eometry of the system. Current report presents the study of the elliptic f low for π0 mesons in asymmetric Cu+Au collisions at √sNN=200 GeV versus transverse momentum and centrality of the collision. \nThe research is p artially funded by the Ministry of Science and Higher Education of the Rus sian Federation under the strategic academic leadership program ’Priorit y 2030’ (Agreement 075-15-2021-1333 dated 30.09.2021). \n1. H. Bueschin g et al. (PHENIX Collaboration)\, J.Phys. G31 (2005) S473-S480\;\n2. Adcox K. et al. (PHENIX Collaboration)\, Nucl. Phys. A 2005. V.757\;\n3. P. Sor ensen. (2010). Elliptic Flow: A Study of Space-Momentum Correlations in\nR elativistic Nuclear Collisions. Quark-gluon plasma 4 (pp. 323-374)\;\n4. K . Adcox et al. (PHENIX Collaboration)\, Nucl. Phys. 103 A757\, 184 (2005)\ ;\n5. R. Snellings. New J.Phys.\, 13 055008 (2011)\;\n6. A. Adare et al. ( PHENIX Collaboration)\, Phys.Rev.C 88\, 064910 (2013)\;\n7. Chaudhuri\, A. (2013). Viscous Hydrodynamic Model for Relativistic Heavy Ion Collisions. Advances in High Energy Physics. 2013. 10.1155/2013/693180.c\n\nhttps://e vents.sinp.msu.ru/event/8/contributions/484/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/484/ END:VEVENT BEGIN:VEVENT SUMMARY:MULTIPLICITY DISTRIBUTIONS AND COMBINANTS IN MULTI-POMERON EXCHANG E MODEL DTSTART;VALUE=DATE-TIME:20220713T153000Z DTEND;VALUE=DATE-TIME:20220713T155000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-488@events.sinp.msu.ru DESCRIPTION:Speakers: Vladimir Vechernin (St. Petersburg State University) \nIn the framework of the multi-pomeron exchange model (MPEM) with string fusion [1\,2] we study the multiplicity distributions of charged particles and their combinants in pp collisions at LHC energies and compare the res ults with the data obtained by ALICE [3] and CMS [4] collaborations at CER N. We use the standard distribution in number of cut pomerons in pp collis ions [5]. In this model\, each cut pomeron corresponds to the formation of a pair of quark-gluon strings. An increase in the multiplicity density wi th initial energy in pp collisions is explained by an increase in the mean number of cut pomerons and a growth of the average multiplicity from a si ngle string. The last effectively takes into account the string fusion pro cesses. \nWe show that the initial version of the MPEM with the Poisson di stribution of particles from a single pomeron can not explain the experime ntal data. We replace the Poisson distribution by a Gaussian distribution with the scaled variance ω>1\, corresponding to the NBD at high multiplic ities. We found that the value of ω increases with the width of observati on window in pseudorapidity. This is in correspondence with the result obt ained in [6-8] that the ω-1 is proportional to the width of the observati on window and the integrated two-particle correlation function of a single source (string). As a result we obtain a satisfactory description of the ALICE and CMS experimental data on the multiplicity distribution of charge d particles in pp collisions for observation windows of various width in e nergy range from 0.9-7 TeV. \nUsing the calculated multiplicity distributi on we also found their combinants. We see that these quantities really are very sensitive to the form of the multiplicity distribution spectra\, as it was pointed out in [9]. Even minor deviations of the ALICE and CMS data \, within the error\, lead to considerable changes in combinants. However\ , our results of calculating combinants in the framework of the MPEM manag e to reproduce the general behavior of combinants with their number\, in p articular\, their oscillations. The research was supported by St. Petersbu rg State University (project No. 93025435). \n\n1. N. Armesto\, D. A. Derk ach\, G. A. Feofilov\, Phys. Atom. Nucl. 71\, 2087 (2008).\n2. V. N. Koval enko\, A. M. Puchkov\, G. A. Feofilov\, Bull. RAS.: Phys. 80\, 966 (2016). \n3. J. Adam et al. (ALICE Collaboration)\, Eur. Phys. J. C 77\, 33 (2017) .\n4. V. Khachatryan et al. (CMS Collaboration)\, J. High Energy Phys. 01\ , 079 (2011).\n5. G. H. Arakelyan\, A. Capella\, A. B. Kaidalov\, Yu. M. S habelski\, EPJC 26\, 81 (2002).\n6. V. Vechernin\, Eur. Phys. J.: Web of C onf. 191\, 04011 (2018).\n7. E. Andronov\, V. Vechernin\, Eur. Phys. J. A 55\, 14 (2019).\n8. S. Belokurova\, Phys. Part. Nucl. 53\, 154 (2022).\n9. G. Wilk\, Z. Włodarczyk\, J. Phys. G 44\, 015002 (2017).\n\nhttps://even ts.sinp.msu.ru/event/8/contributions/488/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/488/ END:VEVENT BEGIN:VEVENT SUMMARY:Anisotropic flow measurements from the NA61/SHINE and NA49 beam mo mentum scan programs at the CERN SPS DTSTART;VALUE=DATE-TIME:20220715T122000Z DTEND;VALUE=DATE-TIME:20220715T124000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-492@events.sinp.msu.ru DESCRIPTION:Speakers: Oleg Golosov (NRC "Kurchatov Institute"\, NRNU MEPhI )\nThe NA61/SHINE experiment at the CERN SPS has recently extended its pro gram for the energy scan with Pb ions. In the past\, the NA49 experiment\, which preceded NA61/SHINE\, also recorded data for Pb-Pb collisions at di fferent energies. Together\, the two experiments cover a wide range of bea m energies provided by the CERN SPS in the range 13 – 150A GeV/c. Analys is of the new NA61/SHINE data and reanalysis of the existing NA49 data usi ng newly developed procedures allow for a new comprehensive systematic stu dy of collective flow relative to the spectator plane.\n\nWe will present new NA61/SHINE results on directed and elliptic flow measurement in Pb-Pb collisions at 13 and 30A GeV/c relative to the spectator plane determined with the Projectile Spectator Detector. Also a new analysis of 40​A GeV data collected by the NA49 experiment using forward spectator calorimeters (VETO and RCAL) will be shown. The flow coefficients are reported as a fu nction of rapidity and transverse momentum in different classes of collisi on centrality. The new results are compared with existing results from the previous NA49 analysis and the STAR experiment at RHIC.\n\nhttps://events .sinp.msu.ru/event/8/contributions/492/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/492/ END:VEVENT BEGIN:VEVENT SUMMARY:Nucleon resonance contributions to inclusive electron scattering DTSTART;VALUE=DATE-TIME:20220714T120000Z DTEND;VALUE=DATE-TIME:20220714T122000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-491@events.sinp.msu.ru DESCRIPTION:Speakers: Vitaly Chesnokov (SINP MSU)\nExperiments with the CL AS detector at Jefferson Lab provided the dominant part of available in th e world information on exclusive meson electroproduction in the resonance excitation region. Analyses of these results allow us to obtain electrocou pling of most excited states of the nucleon in mass range up to 1.75 GeV a nd at photon virtuality Q2 from photon point and up to 5 GeV2 [1]. It made possible\, for the first time\, evaluate the resonant contribution into i nclusive electron scattering observables from experimental results on nucl eon resonance electrocouplings [2\,3].\nThe approach and the computational tool developed for evaluation of the resonant contribution into inclusive electron scattering observables will be presented in the talk. We use a r elativistic Breit-Wigner ansatz to estimate the resonant contributions to the inclusive electron scattering unpolarized cross sections and to the un polarized structure functions F1 and F2. In extraction of F1 and F2 struc ture functions from the data\, the experimental results on the longitudina l over transverse cross section ratio RLT available from the Hall A/C meas urements [2\,4] was used.\nThe results obtained offer new opportunities fo r insight into unpolarized parton distribution function (PDF) in the groun d state of the nucleon at large values of partial parton momentum x within the resonance excitation region and for exploration of quark-hadron duali ty. Further extension of this effort in 12 GeV era at Jefferson Lab will a llow us to obtain the resonant contributions into inclusive electron scatt ering within Q2 range up to 10 GeV2\, offering a unique information on PDF evolution in the resonance region at the distances where the transition f rom quark-gluon confinement to perturbative QCD regime of strong interacti on is expected.\n\n1. D.S. Carman\, K. Joo\, and V.I. Mokeev\, Few Body Sy st. 61\, 29 (2020).\n2. A. N. Hiller Blin\, et al.\, Phys. Rev. C 100\, 03 5201 (2019)\n3. A. N. Hiller Blin\, et al.\, Phys. Rev. C 104\, 025201 (20 21)\n4. V. Tvaskis et al.\, Phys. Rev. C 97\, 045204 (2018)\n\nhttps://eve nts.sinp.msu.ru/event/8/contributions/491/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/491/ END:VEVENT BEGIN:VEVENT SUMMARY:Commissioning of the forward detectors to measure spectators in nu cleus-nucleus reactions at the BM@N DTSTART;VALUE=DATE-TIME:20220714T140900Z DTEND;VALUE=DATE-TIME:20220714T142900Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-502@events.sinp.msu.ru DESCRIPTION:Speakers: Alexander Izvestnyy (INR RAS)\nThe BM@N (Baryonic Ma tter at Nuclotron) is a fixed target experiment at the NICA-Nuclotron (JIN R\, Dubna\, Russia) accelerator complex designed to study the properties o f the dense nuclear matter produced in the nucleus-nucleus collisions. Sev eral forward detectors have been developed and constructed at the INR RAS. These detectors are the Forward Hadron Calorimeter (FHCal)\, the Scintill ation Wall (ScWall) and the Beam Hodoscopes (BH).\nThe FHCal is a lead/sci ntillator sampling hadron calorimeter with modular design and longitudinal module segmentation. The calorimeter has a hole in the center for the pas sage of the beam particles that did not interact with the target through t he calorimeter. The ScWall consists of scintillator tiles and is designed to detect the charged fragments from nucleus-nucleus reactions. The BHs ar e designed for detection of heaviest nuclear fragments and non-interacting beam ions. They will be installed on the entrance of the FHCal and will c over the beam hole of the calorimeter. The BHs consist of optically isolat ed scintillator or quarz bars with light collection from both ends. All fo rward detectors have light detection performed by silicon photomultipliers . Signals are amplified and digitized with fast sampling ADCs.\nThe status of development and construction of the forward detectors for the BM@N exp eriment will be presented. Performance of the forward detectors and their calibration during the Short Range Correlations (SRC) run period at the BM @N will be discussed.\n\nhttps://events.sinp.msu.ru/event/8/contributions/ 502/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/502/ END:VEVENT BEGIN:VEVENT SUMMARY:Application of the MC-Glauber approach for centrality determinatio n in heavy-ion collisions with the BM@N experiment DTSTART;VALUE=DATE-TIME:20220714T142900Z DTEND;VALUE=DATE-TIME:20220714T144900Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-503@events.sinp.msu.ru DESCRIPTION:Speakers: Alexandra Andomina (NRNU MEPhI)\nCentrality is an im portant concept in the study of strongly interacting matter created in a h eavy-ion collision whose evolution depends on its initial geometry. In the case of Baryonic Matter at Nuclotron (BM@N)\, which is a fixed-target exp eriment\, collision can be characterized by the measured multiplicity or e nergy of produced particles at midrapidity or spectator fragments in the f orward rapidity region.\nWe will present the application of the MC-Glauber approach for centrality determination in heavy-ion collisions with the BM @N experiment. The multiplicity of charged hadrons is measured in BM@N usi ng a combination of Silicon Tracking System (STS) and Gaseous Electron Mul tiplier (GEM) detectors and connected to collision geometry parameters usi ng the Monte-Carlo Glauber model. We will discuss the applicability of the standard Monte-Carlo Glauber approach for medium-sized nuclei collisions with low multiplicity\, which is typical for the BM@N.\n\nhttps://events.s inp.msu.ru/event/8/contributions/503/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/503/ END:VEVENT BEGIN:VEVENT SUMMARY:Evaluation of ΚΛ and ΚΣ0 electroproduction cross sections from the CLAS data DTSTART;VALUE=DATE-TIME:20220714T130000Z DTEND;VALUE=DATE-TIME:20220714T132000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-512@events.sinp.msu.ru DESCRIPTION:Speakers: Maksim Davydov (Moscow State University)\nThe method and computational tool will be presented for the evaluation of $Κ\\Lambd a$ and $Κ\\Sigma^0$ electroproduction cross sections from the experimenta l results on exclusive structure functions $\\frac{d\\sigma_T}{d\\Omega}$\ , $\\frac{d\\sigma_L}{d\\Omega}$\, $\\frac{d\\sigma_{LT}}{d\\Omega}$\, and $\\frac{d\\sigma_{TT}}{d\\Omega}$ available from the measurements with th e CLAS detector [2\,3] with numerical results stored in the CLAS physics d atabase [1]. The tool is capable to predict differential $Κ\\Lambda$ and $Κ\\Sigma^0$ cross sections within the kinematic area of the invariant ma ss of the final hadrons $W < 2.6$ GeV and at photon virtualities 0 GeV$^2$ < $Q^2$ < 5.0 GeV$^2$ from interpolated/extrapolated exclusive structure functions $\\frac{d\\sigma_T}{d\\Omega}$\, $\\frac{d\\sigma_L}{d\\Omega}$\ , $\\frac{d\\sigma_{LT}}{d\\Omega}$\, and $\\frac{d\\sigma_{TT}}{d\\Omega} $. For reliable interpolation of structure function at low $Q^2$\, the pho toproduction data on beam spin asymmetry $\\Sigma$ [4] were used. The deve loped approach provides evaluation of differential electroproduction cross section within mentioned above kinematics area entirely from the experime ntal data without any bias from reaction model assumptions. We implement s everal techniques for interpolation of the exclusive structure functions o ver kinematic variables $W$\, $Q^2$\, and the final kaon emission angle in the CM frame $\\cos(\\theta)$. In addition\, various extrapolation proced ures were implemented in the kinematic area where the experimental data ar e still not available or insufficient. Comparison with available data conf irmed credible evaluation of $Κ\\Lambda$ and $Κ\\Sigma^0$ differential c ross sections. The developed approach will be used for extraction of struc ture function from the first results on $Κ\\Lambda$ and $Κ\\Sigma^0$ bea m spin asymmetry data measured with the recently put in operation CLAS12 d etector at Jefferson Lab. The studies of $Κ\\Lambda$ and $Κ\\Sigma^0$ el ectroproduction channels will open the new avenue in exploration of the nu cleon resonance structure in the experiments of 12 GeV era at Jefferson La b in collaboration with Physics Department and Skobeltsyn Nuclear Physics Institute at Lomonosov Moscow State University. \n\n1. https://clas.sinp.m su.ru/cgi-bin/jlab/db.cgi\n2. P. Ambrozewicz et al. [CLAS Collaboration]\, Phys. Rev. C 75\, 045203 (2007).\n3. D.S. Carman et al. [CLAS Collaborati on]\, Phys. Rev. C 87\, №2\, 025204 (2013).\n4. M.E. McCracken et al. [C LAS Collaboration]\, Phys. Rev. C 81\, 025201 (2010).\n\nhttps://events.si np.msu.ru/event/8/contributions/512/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/512/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing the hot QCD matter via quarkonia at the next-generation he avy-ion experiment at LHC DTSTART;VALUE=DATE-TIME:20220712T101000Z DTEND;VALUE=DATE-TIME:20220712T103000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-516@events.sinp.msu.ru DESCRIPTION:Speakers: Yuri Kharlov (Institute for High Energy Physics of N RC Kurchatov Institute (RU))\nQuarkonia represent one of the most valuable probes of the deconfined quark-gluon hot medium since the very first expe rimental studies with ultrarelativistic heavy-ion collisions. A significan t step forward in characterizing the QCD matter via systematic studies of quarkonia production will be performed by the next-generation heavy-ion ex periment ALICE 3 [1]\, a successor of the ongoing ALICE experiment at the Large Hadron Collider. The new advanced detector of ALICE 3 will allow for exploring production of S- and P-state quarkonia at high statistics at lo w and moderate transverse momenta range. Performance of the ALICE 3 for qu arkonia measurements and requirements for the detectors will be discussed in the talk.\n\n1. ALICE Collaboration\, Letter of intent for ALICE 3: A n ext-generation heavy-ion experiment at the LHC. CERN-LHCC-2022-009\, LHCC- I-038\n\nhttps://events.sinp.msu.ru/event/8/contributions/516/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/516/ END:VEVENT BEGIN:VEVENT SUMMARY:MPD prospects for the study of hadron and (hyper)nuclei production at NICA energies DTSTART;VALUE=DATE-TIME:20220715T080000Z DTEND;VALUE=DATE-TIME:20220715T082000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-540@events.sinp.msu.ru DESCRIPTION:Speakers: Alexander Mudrokh (JINR)\nMPD prospects for the stud y of hadron and (hyper)nuclei production at NICA energies\n\nA. A. Mudrokh for the MPD Collaboration\n1 Joint Institute for Nuclear Research\, Dubna \, Russia\n E-mail: mudrokh@jinr.ru \n\nThe MultiPurpose Detector (MPD) [1 ] is constructed to study strongly interacting matter at the NICA accelera tor complex [2]. In this report\, we present the main NICA physics goals and the concept of the MPD detector with an emphasis to the detector perfo rmance for the measurements of hadron observables (yields and ratios) as w ell as reconstruction of (hyper)nuclei.\n\n\n1. Ch. U. Abraamyan et al. (M PD Collab.)\, Nucl. Instrum. Methods Phys. Res.\, Sect. A 628\, 99 (2011)\ n2. V. Kekelidze\, R. Lednicky\, V. Matveev\, et al.\, Eur. Phys. J. A 52\ , 211 (2016)\n\nhttps://events.sinp.msu.ru/event/8/contributions/540/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/540/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for new physics with ultra-peripheral collisions at the L HC DTSTART;VALUE=DATE-TIME:20220712T095000Z DTEND;VALUE=DATE-TIME:20220712T101000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-534@events.sinp.msu.ru DESCRIPTION:Speakers: Nazar Burmasov (Petersburg Nuclear Physics Institute )\nUltra-peripheral collisions of heavy ions (UPCs) give a unique opportun ity for studies of two-photon interactions in an environment with suppress ed hadronic processes and enhanced electromagnetic interactions. Specifica lly\, studies of light-by-light scattering process (LbyL) can provide a ne w insight on axion-like particles (ALPs) production\, which emerge in a nu mber of Standard Model extensions and are proposed as dark matter candidat es. LbyL was measured by the ATLAS and CMS collaborations in the mass regi on above 5 GeV/$c^2$\, and there is a possibility for the new ALICE 3 expe riment to cover the low mass region\, that could possibly explain muon $g- 2$ discrepancy observed at the Fermilab.\n\nPrecise measurements of the an omalous magnetic moments of leptons can be used to probe effects of physic s beyond the Standard Model (BSM)\, such as production of supersymmetric p articles or composite nature of leptons. Sensitivity to BSM physics of the anomalous magnetic moment of the $\\tau$-lepton is predicted to be $\\sim $280 times higher than that of the muon\, but the short lifetime makes it impossible to use conventional measurement methods. UPCs are proposed as a n alternative tool\, as cross sections of $\\tau$ production are sensitive to the anomalous magnetic moment.\n\nIn this contribution\, the prospects of LbyL measurements\, ALP searches and tau g-2 studies with ultra-periph eral collisions at the LHC will be discussed.\n\nhttps://events.sinp.msu.r u/event/8/contributions/534/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/534/ END:VEVENT BEGIN:VEVENT SUMMARY:THERMAL PHOTONS PRODUCTION IN PROTON-PROTON COLLISIONS AT HIGH ENE RGIES DTSTART;VALUE=DATE-TIME:20220714T130000Z DTEND;VALUE=DATE-TIME:20220714T132000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-539@events.sinp.msu.ru DESCRIPTION:Speakers: Mohsun Alizada (Baku State University)\nIn proton-p roton collision at high energies are produced two type photons: prompt and thermal. Prompt photons are produced at Compton scattering of quark-gluon and at annihilation of quak-antquark processes [1]. Thermal photons are produced in the processes with participation π mesons [2]. \nWe construct ed Feynman diagrams of the thermal photons production in following process es: 1.\, 2. \, 3. \, 4. \, 5. \, 6. and wrote matrix elements. Calculation of the square of matrix elements are performed using FeynCalc. \nThe depe ndence of differential cross section of processes production thermal photo ns on energy of colliding protons and on cosine of angle of scattering of photons are investigated. In calculation of differential cross section of these processes form factor of mesons also has been taked in account.\nIt is shown that the differential cross section of investigated processes dec reased with increasing of energy of colliding protons. Comparison of diffe rential cross section of processes has been carried out. The dependence of differential cross section of processes 1\,3 and 4 on cosine of the angle of scattering photons is symmetric relative to 0 and it increases with th e cosine of the angle in the intervals [-1\, 0] and [0\, 1]. The different ial cross section of process 2 has a maximum at -1 cosine of the scatterin g angle of photons and decreases with increasing cosine of the angle scatt ering photons. The differential cross section of process 5 does not depend on cosine of the angle scattering photons. It is shown that accounting of the form factor of mesons reduces of differential cross section of proces ses.\n\n1. M. Germain\, on behalf of the ALICE Collaboration\, Nucl.Phys. A 967\, 696 (2017).\n2. J. Kapusta\, P. Lichard\, D. Seibert\, Phys.Rew. D 44\, 2774 (1991).\n\nhttps://events.sinp.msu.ru/event/8/contributions/539 / LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/539/ END:VEVENT BEGIN:VEVENT SUMMARY:Hadronic resonance production with ALICE at the LHC DTSTART;VALUE=DATE-TIME:20220713T124000Z DTEND;VALUE=DATE-TIME:20220713T130000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-545@events.sinp.msu.ru DESCRIPTION:Speakers: Sergey Kiselev (NRC «Kurchatov Institute» - ITEP\, Moscow\, Russia)\nThe study of resonance production is important in proto n-proton\, proton-nucleus\, and heavy-ion collisions.\nIn heavy-ion collis ions\, since the lifetimes of short-lived resonances are comparable with t he lifetime \nof the late hadronic phase\, regeneration and rescattering e ffects become important and resonance yield ratios \nto those of longer li ved particles can be used to estimate the time interval between the chemic al and kinetic freeze-out.\nThe measurements in pp and p-Pb collisions con stitute a reference for nuclear collisions \nand provide information for t uning event generators inspired by Quantum Chromodynamics.\nIn this talk\, recent results on short-lived hadronic resonances obtained with ALICE at LHC energies are presented. \nThe presented results include system-size and collision-energy evolution of transverse momentum spectra\, \nyields and the ratios of resonance yields to those of longer lived particles\, an d nuclear modification factors. \nThe results will be compared with model predictions and measurements at lower energies.\n\nhttps://events.sinp.msu .ru/event/8/contributions/545/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/545/ END:VEVENT BEGIN:VEVENT SUMMARY:Proton and deuteron polarimetry at Nuclotron-NICA DTSTART;VALUE=DATE-TIME:20220714T144900Z DTEND;VALUE=DATE-TIME:20220714T150900Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-548@events.sinp.msu.ru DESCRIPTION:Speakers: Arkadiy Terekhin ()\nExtensive experience has been a ccumulated in deuteron and proton beam polarization measurements as well a s in the the simulation of the pp-\, pd- and dp-elastic scattering up to 1 GeV/nucleon for polarimeter upgrade at the Nuclotron Internal Target Sta tion. Further development of the pp-\, pd- and dd- colliding beams polar imetry at NICA is discussed. The first results of the simulation of thes e proceses at the total energy up to 27 GeV are presented.\n\nhttps://even ts.sinp.msu.ru/event/8/contributions/548/ LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/548/ END:VEVENT BEGIN:VEVENT SUMMARY:Charmed Particle Production in Geant4 DTSTART;VALUE=DATE-TIME:20220715T072000Z DTEND;VALUE=DATE-TIME:20220715T074000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-550@events.sinp.msu.ru DESCRIPTION:Speakers: Aida Galoian (Joint Institute for Nuclear Research ( JINR))\nCharmed Particle Production in Geant4 \n \n A. Galoyan^1\, V. Grichine^2\, V. Uzhinsky^1 \n1 Joint Institute for Nuclear Research\, Dubna\, Russia\;\n2 P. N. Lebedev Physical Institute of RAS\, Moscow\, Ru ssia\n E-mail: galoyan@lxmx00.jinr.ru\n\nCharmed particles production was observed and measured in fixed target experiments performed in CERN\, Ferm ilab and DESY with hadron beams at energies from 200 GeV up to 900 GeV. T he charmed particles production is studied by all RHIC and LHC collaborati ons. It is expected that the charmed particles will be copiously produced at the Future Circular Collider (FCC). Due to long life time of the partic les\, it will be needed to account their interactions with surrounded matt er and detector materials. In order to meet the requirement\, the charmed particles were introduced in the Geant4 toolkit. First of all\, a list of the charmed particles according to PDG has been implemented. Their decay c hannels are not setting up until now\, though there is a possibility for u ser to determine the channels in the Geant4. The next step was simulation of the charmed particle production in soft hadronic interactions. We foll owed to the Kaidalov – Piskunova approach [1\,2]. The approach gives fr agmentation functions of quarks into the charmed particles. It is assumed that there are no constituent charmed quarks in initial hadrons. All of t hese has been implemented in FTFP and QGSP hadronic generators of the Gean t4 toolkit\, and allow to reach a good description of known experimental d ata on the soft charmed particle production. \nWe have applied a simple sc aling in calculation of cross sections of the charmed particles with nucle ons [3]. We are going to generalize it for nuclear targets. We will consi der some details of the implementation in our talk.\n\n 1. A.B. Kaida lov and O.I. Piskunova\, Z. Phys. C 30\, 145 (1986). \n 2. A.B. Kai dalov and O.I. Piskunova\, Sov. J. Nucl. Phys. 43\, 994 (1986).\n 3. V.N. Grichine\, IEEE Trans. Nucl. Sci. 67\, 1993 (2020).\n\nhttps://ev ents.sinp.msu.ru/event/8/contributions/550/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/550/ END:VEVENT BEGIN:VEVENT SUMMARY:Production of Σ0 hyperon and search of Σ0-hypernuclei at LHC wi th ALICE DTSTART;VALUE=DATE-TIME:20220712T093000Z DTEND;VALUE=DATE-TIME:20220712T095000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-552@events.sinp.msu.ru DESCRIPTION:Speakers: Alexander Borissov (MIPT (RU))\nThe first measuremen ts of the transverse momentum (pT) spectra\, integrated yields and mean pT of Σ0 and anti-Σ0 hyperons in pp collisions at s√=7 TeV at the LHC ar e presented. The Σ0(anti-Σ0) signal is reconstructed via its electromagn etic decay channel Λ (anti-Λ)γ. The Λ (anti-Λ) baryon is reconstructe d via its decay into p + π− (anti-p+π+)\, while the photon is detected by exploiting the unique capability of the ALICE detector to measure low- energy photons via conversion into e+e− pairs in the detector material.\ nThe yield of Σ0 is compared to that of the Λ baryon\, which has the sam e quark content but different isospin. These data contribute to the unders tanding of hadron production mechanisms and provide a reference for constr aining QCD-inspired models and tuning Monte Carlo event generators such as PYTHIA.\n\nIn addition\, the feasibility of a search for a bound state of proton\, neutron and Σ0 (Σ0-hypernuclei 3Σ0H) is presented\, based on the luminosities foreseen for the LHC Runs 3 and 4.\n\nhttps://events.sinp .msu.ru/event/8/contributions/552/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/552/ END:VEVENT BEGIN:VEVENT SUMMARY:HADRON PRODUCTION IN pp AND AA COLLISIONS WITHIN SELF-SIMILARITY A PPROACH DTSTART;VALUE=DATE-TIME:20220714T150900Z DTEND;VALUE=DATE-TIME:20220714T152900Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-568@events.sinp.msu.ru DESCRIPTION:Speakers: Andrei Zaitsev ()\nThe self-similarity approach is a pplied to study the hadron production in mid-rapidity region in $pp$ and $ AA$ collisions. Our calculations describe satisfactorily the experimental data on the inclusive pT spectra of pions and kaons produced in $pp$ and c entral $BeBe$ collisions and their ratios as a function of initial energy $\\sqrt{s}$. We collect also data on ratios of baryon to anti-baryon yield s in $pp$ and $AA$ collisions as a function of $\\sqrt{s}$ and find the si milarity of these ratios for different colliding nuclei.\n\nhttps://events .sinp.msu.ru/event/8/contributions/568/ LOCATION: НИИЯФ\, ЮК\, Ц-05 URL:https://events.sinp.msu.ru/event/8/contributions/568/ END:VEVENT BEGIN:VEVENT SUMMARY:First measurement of the forward rapidity gap distribution in prot on-lead collisions at LHC energy $\\sqrt{s_{\\mathrm{NN}}} = 8.16\\mathrm{ ~TeV}$ with the CMS experiment DTSTART;VALUE=DATE-TIME:20220712T120000Z DTEND;VALUE=DATE-TIME:20220712T122000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-558@events.sinp.msu.ru DESCRIPTION:Speakers: Dmitry Sosnov (NRC KI — PNPI)\nFor the first time at LHC energies\, we present the forward rapidity gap spectra from proton- lead (pPb) collisions for both pomeron-lead and pomeron-proton topologies. The analysis is performed over 10.4 units of pseudorapidity. The center-o f-mass energy is 8.16 TeV per nucleon-nucleon pair\, i.e.\, almost 300 tim es higher than previous measurements of diffractive production in proton-n ucleus collisions. For the pomeron-lead topology\, the EPOS - LHC predicti ons are a factor of two below the unfolded data\, but the model does give a reasonable description of the spectrum's shape. For the pomeron-proton t opology\, the EPOS-LHC\, QGSJET II\, and HIJING generator predictions are all at least a factor of five below the data. This effect can be explained by a significant contribution of ultra-peripheral photoproduction events mimicking the signature of diffractive processes. The obtained data may be of significant help in understanding the high energy limit of QCD and mod eling cosmic ray air showers.\n\nhttps://events.sinp.msu.ru/event/8/contri butions/558/ LOCATION: НИИЯФ\, ЮК\, 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/558/ END:VEVENT BEGIN:VEVENT SUMMARY:Dijet events with large rapidity separation in proton-proton colli sions at √s = 2.76 TeV with CMS detector DTSTART;VALUE=DATE-TIME:20220713T145000Z DTEND;VALUE=DATE-TIME:20220713T151000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-559@events.sinp.msu.ru DESCRIPTION:Speakers: Anatolii Egorov (NRC KI – PNPI\, Gatchina & St.Pet ersburg Polytechnic University\, Russia)\nThe new search for Balitsky-Fa­ din-Kuraev-Lipatov (BFKL) evolution effects is performed at the Large Hadr on Collider by the Compact Muon Solenoid experiment. The cross sections fo r inclusive and Mueller-Navelet dijet production are measured as a functio n of the rapidity separation between the jets in proton-proton collisions at √s = 2.76 TeV for jets with transverse momentum pT > 35 GeV and rapid ity |y| < 4.7. Various dijet production cross section ratios are also meas ured. A veto on additional jets with pT > 20GeV is introduced to improve t he sensitivity to the BFKL evolution. The measurement is compared with the predictions of various Monte Carlo models based on leading-order and next -to-leading-order calculations including the Dokshitzer-Gribov-Lipatov-Alt arelli-Parisi leading-logarithm (LL) parton shower as well as the LL BFKL resummation.\n\nhttps://events.sinp.msu.ru/event/8/contributions/559/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/559/ END:VEVENT BEGIN:VEVENT SUMMARY:The computational tool for evaluation of Nπ electroproduction cro ss sections DTSTART;VALUE=DATE-TIME:20220714T132000Z DTEND;VALUE=DATE-TIME:20220714T134000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-567@events.sinp.msu.ru DESCRIPTION:Speakers: Almaz Nasrtdinov (MSU)\nThe measurements of exclusiv e $\\pi^+n$ and $\\pi^op$ electroproduction with the CLAS detector in Hall B at Jlab provided the dominant part of the world data on observables of these channels [1\,2] stored in the CLAS Physics Data Base [3]. The data o n exclusive Nπ and $\\pi^+\\pi^-p$ electroproduction are the major source of the information on nucleon resonance (N*) electroexcitation amplitudes . They offer insight into the Nπ structure and strong QCD dynamics which underlie the nucleon resonance generation from quarks and gluons [1\,2\,4] . The approach for evaluation of the four-fold $N\\pi$ differential cross sections from unpolarized\, transverse-transverse\, longitudinal-transvers e exclusive structure functions will be presented in the talk. The special procedures were developed for extraction of the mentioned above structure functions from experimental data. These structure functions were interpol ated within entire $N\\pi$ electroproduction phase space covered in the me asurements with CLAS offering evaluation of $N\\pi$ electroproduction cros s section entirely from the experimental data without any bias from reacti on models. Comparison with the available data on Np electroproduction dem onstrated credibility of approaches developed for cross section evaluation . For the first time\, reliable estimates of $N\\pi$ electroproduction obs ervables have become available within a broad kinematics area of the invar iant masses of the final hadron system of W < 1.7 GeV and the photon virtu ality range $Q^2$ < 5.0 $GeV^2$. The estimated $N\\pi$ cross sections and exclusive structure functions are of particular importance for the studies of the N* structure. Future extension of these estimates toward higher W covering DIS region are important for exploration of the ground nucleon st ructure in 3-dimesions from the results on the chiral-odd generalized part on distributions constrained by the data of deeply virtual $N\\pi$ electro production. The extracted structure functions and the computer code for on -line evaluation of Np electroproduction cross sections are available on t he website [5] for the access worldwide.\n\n\n1. I.G. Aznauryan and V.D. B urkert\, Electroexcitation of Nucleon Resonances\, Prog. Part. Nucl. Phys. 67\, 1 (2012).\n2. D.S. Carman\, K. Joo\, and V.I. Mokeev\, Few Body Syst . 61 29 (2020).\n3. CLAS Physics Database\, http://clasweb.jlab.org/physic sdb\n4. V.D. Burkert et al.\, The Nucleon Resonance Structure from the $\\ pi^+\\pi^-p$ electroproduction Reaction off Protons\, Moscow Univ. Phys. B ull. 74\, 243 (2019).\n5. https://clas.sinp.msu.ru/~almaz\n\nhttps://event s.sinp.msu.ru/event/8/contributions/567/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/567/ END:VEVENT BEGIN:VEVENT SUMMARY:FRACTAL ANALISIS OF Au+Au MONTE CARLO EVENTS AT 200 GEV/c DTSTART;VALUE=DATE-TIME:20220713T141000Z DTEND;VALUE=DATE-TIME:20220713T143000Z DTSTAMP;VALUE=DATE-TIME:20260519T223724Z UID:indico-contribution-35-572@events.sinp.msu.ru DESCRIPTION:Speakers: Tatiana Dedovich (Joint Institute for Nuclear Resear ch)\nResults of fractal analysis of Au+Au events at the energy of $\\sqrt{ s_{NN}} = 200$ GeV/c by the method of the equation systems of power coveri ngs (SePaC) [1] are presented. A Multi-Phase Transport (AMPT) model [2\,3] to generate events in relativistic heavy ion collisions was used. In Even t-by-Event analysis a distribution on the transverse momentum $p_Т$ of ne gatively charged particles produced in the pseudo-rapidity interval $|\\et a| <0.5$ in the events with different centrality from 0-5% to 30-40% was s tudied.\nThe fractal data set includes 1823 events obtained by independent [4]\, dependent [5]\, and combined [6] partition. Fractal events differ i n multiplicity (from 8 to 1024)\, the base of formation $P_F$ (from 3 to 8 )\, and the type of structures. The criteria characterizing the similarity of structures at different levels and reducing the portion of background events (mixed data\, events with Gaussian\, exponential\, and uniform dist ributions) [7] were used. \nComparison of the Monte Carlo fractals\, rando m events and AMPT events was performed. It was found that the multiplicity distribution for the sets of random events coincides with the distributio n obtained using the AMPT generator. Distribution of fractal events with d ifferent multiplicity on the dimension DF was obtained and their structure is discussed. The results of applying the selection criteria for various types of events are presented.\n\n1. T. G. Dedovich\, M.V. Tokarev\, Phys. Part. Nucl. Lett. 19\, 552 (2011).\n2. Z.W. Lin\, C.M. Ko\, Phys. Rev. C 65\, 034904 (2002).\n3. Z.W. Lin et al.\, Phys. Rev. C 72\, 064901 (2005). \n4. T. G. Dedovich\, M.V. Tokarev\, Phys. Part. Nucl. Lett. 10\, 481 (201 3).\n5. T. G. Dedovich\, M.V. Tokarev\, Phys. Part. Nucl. Lett. 10\, 491 ( 2013).\n6. T. G. Dedovich\, M.V. Tokarev\, Phys. Part. Nucl. Lett. 13\, 16 9 (2016).\n7. T. G. Dedovich\, M.V. Tokarev\, Phys. Part. Nucl. Lett. 18\, 93 (2021).\n\nhttps://events.sinp.msu.ru/event/8/contributions/572/ LOCATION: НИИЯФ\, ЮК\, ауд. 3-13 URL:https://events.sinp.msu.ru/event/8/contributions/572/ END:VEVENT END:VCALENDAR