Equation of state in (2+1) flavor QCD at high temperatures

2018/11/30 by Johannes Heinrich Weber, Weber, Johannes Heinrich, Alexei Bazavov +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #hep-lat #hep-ph #nucl-th

paper · pdf · doi:10.48550/arxiv.1811.12902

Parallel talk at the XIIIth Quark Confinement and the Hadron Spectrum conference. 12 pages, 8 figures

arxiv created 2018/11/30 · arxiv updated 2018/12/03

Abstract

We calculate the Equation of State at high temperatures in (2+1) flavor QCD using the highly improved staggered quark (HISQ) action. We study the lattice spacing dependence of the pressure at high temperatures using lattices with temporal extent N_τ=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 reasonable agreement with the HTL calculation at the highest temperatures and a tension with the EQCD calculation of a few percent, with the lattice results in the middle between both.

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