Equation of State in 2+1 Flavor QCD at High Temperatures

TL;DR

This paper computes the Equation of State in 2+1 flavor QCD at high temperatures using lattice simulations with improved staggered quarks, and compares results with weak-coupling predictions, achieving continuum estimates up to 2 GeV.

Contribution

It provides continuum extrapolated results for the QCD Equation of State at high temperatures using multiple lattice spacings and compares them with weak-coupling calculations.

Findings

Good agreement with weak-coupling results at high temperatures

Continuum estimate of the Equation of State up to 2 GeV

Lattice spacing dependence studied with multiple N_tau values

Abstract

We calculate the Equation of State at high temperatures in 2+1 flavor QCD using the highly improved staggered quark action. We study the lattice spacing dependence of the pressure at high temperatures using lattices with temporal extent $N_{\tau}=6,~8,~10$ and $12$ and perform continuum extrapolations. We also give a continuum estimate for the Equation of State up to temperatures $T=2$ GeV, which are then compared with results of the weak-coupling calculations. We find a reasonably good agreement with the weak-coupling calculations at the highest temperatures.