论文标题
轴向u（1）对称和高温下的中性相关器$ n_f = 2 $ lattice qcd
Axial U(1) symmetry and mesonic correlators at high temperature in $N_f=2$ lattice QCD
论文作者
论文摘要
我们使用$ n_f = 2 $ DynamilicalMöbius域壁壁费用的晶格QCD模拟研究了QCD的高温阶段。在生成的配置上，我们研究轴向$ u（1）$对称性，重叠 - 迪拉克光谱，中间相关器的筛选质量以及拓扑敏感性。我们发现，某些可观察到的物质对晶格伪影非常敏感，这是由于小小的违反了手性对称性的措施。对于那些可观察到的物品，我们通过重叠费米昂的莫比乌斯域壁壁费用决定因素。我们还检查可观察到的体积依赖性。我们在手性限制附近的数据表明，在温度$ \ geq $ 220 meV时，轴向$ u（1）$ u（1）$ u（1）。
We investigate the high-temperature phase of QCD using lattice QCD simulations with $N_f = 2$ dynamical Möbius domain-wall fermions. On generated configurations, we study the axial $U(1)$ symmetry, overlap-Dirac spectra, screening masses from mesonic correlators, and topological susceptibility. We find that some of the observables are quite sensitive to lattice artifacts due to a small violation of the chiral symmetry. For those observables, we reweight the Möbius domain-wall fermion determinant by that of the overlap fermion. We also check the volume dependence of observables. Our data near the chiral limit indicates a strong suppression of the axial $U(1)$ anomaly at temperatures $\geq$ 220 MeV.
