Revealing the collision energy dependence of eta/s in RHIC-BES Au plus Au collisions using Bayesian statistics

摘要

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 root 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).