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arxiv: 1710.05024 · v2 · pith:VBIZFH7Inew · submitted 2017-10-13 · ✦ hep-lat · hep-ph

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

classification ✦ hep-lat hep-ph
keywords temperaturesequationhighstatecalculationscontinuumflavorweak-coupling
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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.

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    Authors derive new Kubo formulae for transport coefficients by analyzing analytic structures of stress-energy response functions in second- and third-order hydrodynamics.