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arXiv 1811.12902hep-lathep-phnucl-th
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(2+1)型QCD的高温状态方程

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

Johannes Heinrich Weber, Alexei Bazavov, Peter Petreczky

摘要:

利用高度改进的交错夸克作用量(HISQ)计算了(2+1)味QCD中的高温物态方程。我们研究了晶格间距的压力在高温下使用晶格的时间范围$N_τ=6,~8,~10$和$12$,并进行连续外推。我们还给出了一个连续的估计状态方程的温度$T=2\,$ GeV,然后与弱耦合计算的结果进行了比较。我们发现合理的协议与HTL计算在最高温度和张力与EQCD计算的百分之几,与晶格的结果在两者之间的中间。

英文摘要:

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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