标题： QCD的物态方程，具有$N_f=3$种味道，直到电弱尺度 显示英文标题

标题： Equation of State of QCD with $N_f=3$ flavours up to the electroweak scale

摘要： 量子色动力学具有$N_f=3$种味的物态方程是在温度范围3 GeV到165 GeV之间通过非微扰方法确定的，精度约为$0.5\%-1.0\%$。该计算是通过对在格点上离散化的规范理论进行数值模拟完成的。在每个给定温度下，为了外推到连续极限，会在多个格点间距下计算熵密度。然后通过将熵密度对温度积分来确定压强和能量密度。数值数据显示出强耦合常数平方的线性行为，这指向无限温度下的斯特藩-玻尔兹曼极限。它们也与已知的微扰公式相容，该公式包含带有非微扰贡献的更高阶项。这种参数化能够很好地描述我们的数据以及文献中的数据，直至500 MeV。 显示英文摘要

摘要： The Equation of State of Quantum Chromodynamics with $N_f=3$ flavours is determined non-perturbatively with a precision of about $0.5\%-1.0\%$ in the range of temperatures between 3 GeV and 165 GeV. The computation is carried out by numerical simulations of the gauge theory discretized on the lattice. At each given temperature the entropy density is computed at several lattice spacings in order to extrapolate the results to the continuum limit. The pressure and energy density are then determined by integrating the entropy density with respect to the temperature. The numerical data show a linear behaviour in the strong coupling constant squared, which points to the Stefan-Boltzmann limit at infinite temperature. They are also compatible with the known perturbative formula supplemented by higher order terms in the coupling constant, containing non-perturbative contributions. This parametrization describes well our data together with those present in the literature down to 500 MeV.