Effects of EoS in viscous hydro+cascade model for the RHIC Beam Energy Scan

Abstract

A state-of-the-art 3+1 dimensional cascade + viscous hydro + cascade model vHLLE+UrQMD has been applied to heavy ion collisions in RHIC Beam Energy Scan range $\sqrt{s_{\mathrm{NN}}}=7.7\dots 200$ GeV. Based on comparison to available experimental data it was estimated that an effective value of shear viscosity over entropy density ratio $\eta /s$ in hydrodynamic stage has to decrease from $\eta /s=0.2$ to $0.08$ as collision energy increases from $\sqrt{s_{\mathrm{NN}}}=7.7$ to $39$ GeV, and to stay at $\eta /s=0.08$ for $39\le \sqrt{s_{\mathrm{NN}}}\le 200$ GeV. In this work we show how an equation of state with first order phase transition affects the hydrodynamic evolution at those collision energies and changes the results of the model as compared to "default scenario" with a crossover type EoS from chiral model.

4 pages and 3 figures. Proceedings of Quark Matter 2015, Kobe, Japan

References in corpus (4)

• A 3+1 dimensional viscous hydrodynamic code for relativistic heavy ion collisions
• Inclusive charged hadron elliptic flow in Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7 - 39 GeV
• Estimation of the shear viscosity at finite net-baryon density from A+A collision data at $\sqrt{s_{\mathrm{NN}}}=7.7-200$ GeV
• An effective chiral Hadron-Quark Equation of State

Cited by in corpus (3)

• Hadronization conditions in relativistic nuclear collisions and the QCD pseudo-critical line
• Correlation femtoscopy study at NICA and STAR energies within a viscous hydrodynamic plus cascade model
• Beam energy scan theory: Status and open questions