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arXiv · 1512.02189

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

J. Scott Moreland·Ron A. Soltz
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Abstract

Hydrodynamic calculations of ultra-relativistic heavy ion collisions are performed using the iEBE-VISHNU 2+1D code with fluctuating initial conditions and three different parameterizations of the Lattice QCD equations of state: continuum extrapolations for stout and HISQ/tree actions, as well as the s95p-v1 parameterization based upon calculations using the p4 action. All parameterizations 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. Calculations for $\sqrt{s_{NN}}=200$ GeV Au+Au collisions in three centrality classes are compared to experimental data for final state particle spectra and anisotropic flow coefficients $v_2$ and $v_3$ as well as for pion HBT radii. 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 ~10-20%. 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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BibTeXRIS

J. Scott Moreland, Ron A. Soltz. 2016-01-22. Hydrodynamic simulations of relativistic heavy-ion collisions with different lattice QCD calculations of the equation of state. https://doi.org/10.1103/physrevc.93.044913

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