Uniform description of bulk observables in the hydrokinetic model of A+A collisions at RHIC and LHC

Abstract

A simultaneous description of hadronic yields; pion, kaon, and proton spectra; elliptic flows; and femtoscopy scales in the hydrokinetic model of A+A collisions is presented at different centralities for the top BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC) 2.76-TeV energies. The initial conditions are based on the Glauber Monte-Carlo simulations. When going from RHIC to LHC energy in the model, the only parameters changed are the normalization of the initial entropy defined by the number of all charged particles in most central collisions, contribution to entropy from binary collisions and baryonic chemical potential. The hydrokinetic model is used in its hybrid version (hHKM), which provides the correct match (at the isochronic hypersurface) of the decaying hadron matter evolution with hadronic ultrarelativistic quantum molecular dynamics cascade. The results are compared with the standard hybrid models where hydrodynamics and hadronic cascade are matching just at the non-space-like hypersurface of chemical freeze-out or on the isochronic hypersurface. The modification of the particle number ratios at LHC caused, in particular, by the particle annihilations at the afterburn stage is also analyzed.

14 pages, 7 figures. Version accepted for publication in Phys.Rev. C

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• Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model

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• The QCD phase diagram and Beam Energy Scan physics: a theory overview
• An overview of the experimental study of quark-gluon matter in high-energy nucleus-nucleus collisions
• An overview of experimental results from ultra-relativistic heavy-ion collisions at the CERN LHC: bulk properties and dynamical evolution
• Hadron spectra, flow and correlations in PbPb collisions at the LHC: interplay between soft and hard physics
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• Transverse-momentum spectra of strange particles produced in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV in the chemical non-equilibrium model
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• Initialization of hydrodynamics in relativistic heavy ion collisions with an energy-momentum transport model
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• Description of bulk observables in Au+Au collisions at top RHIC energy in the integrated HydroKinetic Model
• Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions
• Quark flavor equilibration of the quark-gluon plasma
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