标题： 测试两味QCD手征相变中$\text{U}_A(1)$异常的强度 显示英文标题

标题： Testing the strength of the $\text{U}_A(1)$ anomaly at the chiral phase transition in two-flavour QCD

摘要： 我们通过使用 $\mathcal{O}(a)$-改善的Wilson夸克进行格点模拟，研究了具有两个简并轻夸克味的QCD热跃迁。特别强调的是手征对称性恢复的模式，我们通过静态筛选关联函数来探测这一模式。在 $32^3$ 体积上，我们观察到在跃迁温度处横向同位旋矢量和轴矢量通道的筛选质量变为简并。与零温下的分裂相比，同位旋标量和伪标量通道的筛选质量分裂被大大减小，并且实际上在不确定性范围内与零一致。在这篇会议文章中，我们将研究扩展到矩阵元和同位旋单态关联函数。此外，我们展示了更大体积上的结果，包括物理π介子质量下的初步结果。 显示英文摘要

摘要： We study the thermal transition of QCD with two degenerate light flavours by lattice simulations using $\mathcal{O}(a)$-improved Wilson quarks. Particular emphasis lies on the pattern of chiral symmetry restoration, which we probe via the static screening correlators. On $32^3$ volumes we observe that the screening masses in transverse iso-vector vector and axial-vector channels become degenerate at the transition temperature. The splitting between the screening masses in iso-vector scalar and pseudoscalar channels is strongly reduced compared to the splitting at zero temperature and is actually consistent with zero within uncertainties. In this proceedings article we extend our studies to matrix elements and iso-singlet correlation functions. Furthermore, we present results on larger volumes, including first results at the physical pion mass.