Title: Symmetry of screening masses of mesons in two-flavor lattice QCD at high temperatures Show Chinese title

Title: 高温双味格点QCD中介子筛选质量的对称性

Abstract: We investigate spatial two-point correlation functions of mesonic operators in two-flavor lattice QCD at high temperatures. The simulated temperatures over the range $T \in [147, 330]$ MeV, where the critical temperature is estimated around 165 MeV. To ensure a good control of the chiral symmetry we employ the Möbius domain-wall fermion action for two degenerate flavors of quarks. With a lattice cut off $a^{-1}\sim 2.6$ GeV, the residual mass is reduced to 0.14 MeV. With the energy spectrum obtained from the screening mass at incremental values of the temperature range, we examine the $SU(2)_L\times SU(2)_R$ chiral symmetry, the anomalous axial $U(1)$ as well as an enhanced symmetry which exchanges the spin degrees of freedom. We also study how the data approaches the perturbative prediction given by twice the Matsubara frequency of free quarks. Show Chinese abstract

Abstract: 我们研究了高温下具有两味格点QCD中介子算符的空间两点关联函数。 模拟温度范围从$T \in [147, 330]$MeV 左右开始，其中临界温度估计约为165 MeV。 为了确保良好的手征对称性控制，我们采用了Möbius域墙费米子作用于两个简并夸克味。 晶格截止为$a^{-1}\sim 2.6$GeV 时，残余质量降低到0.14 MeV。 通过从增量温度范围内的筛选质量获得的能量谱，我们检验了$SU(2)_L\times SU(2)_R$手征对称性、反常轴向$U(1)$以及交换自旋自由度的增强对称性。 我们还研究了数据如何趋近于自由夸克的两次马图巴拉频率的微扰预测。