Hydrodynamic simulations of relativistic heavy-ion collisions with different lattice quantum chromodynamics calculations of the equation of state

J. Scott Moreland and Ron A. Soltz
Phys. Rev. C 93, 044913 – Published 25 April 2016

Abstract

Hydrodynamic calculations of ultrarelativistic heavy-ion collisions are performed using the iebe-vishnu 2+1-dimensional code with fluctuating initial conditions and three different parametrizations of the lattice QCD equations of state: continuum extrapolations for stout and HISQ/tree actions, as well as the s95p-v1 parametrization based upon calculations using the p4 action. All parametrizations are matched to a hadron resonance gas equation of state at T=155 MeV, at which point the calculations are continued using the urqmd hadronic cascade. Simulations of sNN=200 GeV Au+Au collisions in three centrality classes are used to quantify anisotropic flow developed in the hydrodynamic phase of the collision as well as particle spectra and pion Hanbury-Brown-Twiss (HBT) radii after hadronic rescattering, which are compared with experimental data. Experimental observables for the stout and HISQ/tree equations of state are observed to differ by less than a few percent for all observables, while the s95p-v1 equation of state generates spectra and flow coefficients which differ by 1020%. Calculations in which the HISQ/tree equation of state is sampled from the published error distribution are also observed to differ by less than a few percent.

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  • Received 27 January 2016

DOI:https://doi.org/10.1103/PhysRevC.93.044913

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

J. Scott Moreland1 and Ron A. Soltz2

  • 1Department of Physics, Duke University, Durham, North Carolina 27708-0305, USA
  • 2Lawrence Livermore National Laboratory, Livermore, California 94551-0808, USA

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Issue

Vol. 93, Iss. 4 — April 2016

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