The QCD Equation of State to O(μB4) from Lattice QCD
Abstract
We present first results from a first-principles calculation of the QCD equation of state to O(μB4), where μB is the baryon chemical potential. We find that second-order corrections are sufficient for a large part of the freeze-out temperature and baryon chemical potential range achieved by the RHIC beam energy scan. Nevertheless, higher-order corrections are necessary to extend the validity of the equation of state down to beam energies s1/2NN 20 GeV.
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