The QCD Equation of State to O(μB⁴) from Lattice QCD

الأصل · EN

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.