标题： 冷而致密QCD物质的状态方程在重求和微扰理论中 显示英文标题

标题： Equation of state of cold and dense QCD matter in resummed perturbation theory

摘要： 我们讨论有限夸克质量下的Hard Dense Loop重求和，并在$\beta$平衡状态下评估冷而致密QCD物质的状态方程(EoS)。 夸克区的重求和效应降低了重子数密度，结果表明状态方程的不确定性远小于微扰QCD的估计值。 我们的数值结果支持高密度下重求和QCD计算得到的状态方程与核物质密度区域外推得到的状态方程之间的平滑匹配。 我们还指出，我们状态方程中的声速略微超过共形极限。 显示英文摘要

摘要： We discuss the Hard Dense Loop resummation at finite quark mass and evaluate the equation of state (EoS) of cold and dense QCD matter in $\beta$ equilibrium. The resummation in the quark sector has an effect of lowering the baryon number density and the EoS turns out to have much smaller uncertainty than the perturbative QCD estimate. Our numerical results favor smooth matching between the EoS from the resummed QCD calculation at high density and the extrapolated EoS from the nuclear matter density region. We also point out that the speed of sound in our EoS slightly exceeds the conformal limit.