论文标题
（2+1）-Fravor QCD状态的等级方程：基于有限化学势的高精度Taylor膨胀和Padé示点膨胀的更新
The isentropic equation of state of (2+1)-flavor QCD: An update based on high precision Taylor expansion and Padé-resummed expansion at finite chemical potentials
论文作者
论文摘要
HOTQCD协作在2017年进行了Taylor扩展计算，该计算的压力，能量密度和熵密度在非零化学电位上的压力，熵密度高达$ 6^{th} $顺序。从那时起，它们已大大提高了$n_τ= 8 $和$ 12 $的晶格的统计数据，并且还包括了$n_τ= 16 $的结果，这些结果以前尚不可用。他们还计算了$ 8^{th} $ - 订单扩展系数$n_τ= 8 $。这些计算表明，压力的泰勒级数膨胀精度高达$μ_b / t \ leq 2.5 $。在这项研究中，我们使用高统计量结果对泰勒膨胀系数进行了计算，该系数用HISQ费米计算并外推到连续限量，以确定与重离子碰撞中产生的热和密集物质相关的条件下的QCD状态方程。我们还计算每个净baryon数的恒定熵线的能量密度和压力。
The HotQCD Collaboration performed Taylor expansion calculations in 2017 for the pressure, energy density, and entropy density at non-zero chemical potentials up to the $6^{th}$ order. Since then, they have significantly improved the statistics for lattices with temporal extents of $N_τ=8$ and $12$, and have also included results for $N_τ=16$ that were not previously available. They have also calculated the $8^{th}$-order expansion coefficients for $N_τ=8$. These calculations showed that the Taylor series expansion for the pressure is accurate up to $μ_B / T \leq 2.5$. In this study, we use the high-statistics results on Taylor expansion coefficients, calculated with HISQ fermions and extrapolated to the continuum limit, to determine the QCD equation of state under conditions relevant for hot and dense matter produced in heavy ion collisions. We also calculate the energy density and pressure along lines of constant entropy per net baryon number.
