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SUMMARY:The study of charged hadron distributions in relativistic heavy-io
 n collisions using holographic thermodynamics
DTSTART;VALUE=DATE-TIME:20261028T071500Z
DTEND;VALUE=DATE-TIME:20261028T073000Z
DTSTAMP;VALUE=DATE-TIME:20261030T064741Z
UID:indico-contribution-6287@cern.ch
DESCRIPTION:Speakers: Anton Anufriev (Saint Petersburg State University)\n
 At the beginning of the 21st century\, a new phase of strongly interacting
  matter\, \nknown as the quark-gluon plasma (QGP)\, was established [1]. T
 o study QGP formation in\nheavy-ion collisions\, the solution of system of
  relativistic hydrodynamics equations with\na specific equation of state (
 EoS) is typically employed. In light of difficulties for non-zero baryonic
  potentials within Lattice QCD\, various holographic models based on the A
 dS/CFT duality have been proposed to obtain the QGP EoS from the thermodyn
 amic properties of a corresponding black brane in AdS$_5$ [2].\n\nIn this 
 work\, we discuss possible phenomenological approach for incorporating not
  only\nthe baryon chemical potential but also the quantum numbers of stran
 geness and charge into holographic thermodynamics. The method proposed emp
 loys a phenomenological hypothesis inspired by the thermodynamic dependenc
 ies of the hadron gas model. The Thermal FIST [3] package helps us to find
  the definition for the full chemical potential\, which behaves like a had
 ron gas in the characteristic temperature range. We apply machine learning
  methods to address regression and optimization problems during the calibr
 ation of the model's free parameters using LQCD results for quark masses t
 hat approximate the physical values [4]. For practical applications in hea
 vy-ion collision studies\, the holographic EoS with strangeness and charge
  is incorporated into the hydrodynamical packages MUSIC [5] and vHLLE [6].
 \n\nTo obtain final hadronic spectra\, numerical simulations were conducte
 d using the iEBE-MUSIC and SMASH-vHLLE frameworks. The various hadronic re
 lations for charged pions\, kaons and protons are studied using approach d
 escribed.\n\nThe authors acknowledge Saint-Petersburg State University for
  a research project ID: 153212394\n\n\nReferences\n\n[1] J. Adams et al. (
 STAR Collab.)\, Nucl. Phys. A 757 102 (2005)\n\n[2] I. Aref’eva\, K. Ran
 nu\, P. Slepov\, Holographic anisotropic model for light quarks with\nconf
 inement-deconfinement phase transition\, J. High Energ. Phys. 2021\, 90 (2
 021).\n\n[3] V. Vovchenko\, H. Stoecker\, Thermal-FIST: A package for heav
 y-ion collisions and hadronic\nequation of state\, Comput. Phys. Commun. 2
 44\, 295 (2019)\n\n[4] M. Cheng et al.\, QCD equation of state with almost
  physical quark masses\, Phys. Rev. D 77\,\n014511 (2008)\n\n[5] B. Schenk
 e\, S. Jeon\, C. Gale\, (3+1)D hydrodynamic simulation of relativistic hea
 vy-ion\ncollisions\, Phys. Rev. C 82\, 014903 (2010)\n\n[6] Iu. Karpenko\,
  P. Huovinen\, M. Bleicher\, A 3+1 dimensional viscous hydrodynamic code f
 or\nrelativistic heavy ion collisions\, Comput. Phys. Commun. 185 (2014)\,
  3016\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6287/
LOCATION: Conference Hall 2
URL:https://indico.particle.mephi.ru/event/626/contributions/6287/
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