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Revealing the collision energy dependence of $η/s$ in RHIC-BES Au+Au collisions using Bayesian statistics (1704.04643v1)
Published 15 Apr 2017 in nucl-th and hep-ph
Abstract: We investigate the collision energy dependence of $\eta/s$ in a transport + viscous hydrodynamics hybrid model. A Bayesian analysis is performed on RHIC beam energy scan data for $Au+Au$ collisions at $\sqrt{s_{NN}}=19.6,39,$ and $62.4$ GeV. The resulting posterior probability distributions for the model parameters show a preference for a larger value of $\eta/s$ at $19.6$ GeV compared to $62.4$ GeV, indicating dependence on baryon chemical potential $\mu_B$.
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