标题： 标量和赝标量介子质量谱在QCD手征相变以上的研究，使用有效拉格朗日方法 显示英文标题

标题： Study of the scalar and pseudoscalar meson mass spectrum above the QCD chiral phase transition, using an effective Lagrangian approach

摘要： 在本工作中，在之前分析的基础上，我们采用有效的拉格朗日方法，在高于（伪）临界温度$T_c$的情况下，研究标量和赝标量介子的质量谱，在一个“现实的”$N_f = 2 + 1$重味情景中，具有简并的$up$和$down$夸克和一个更重的$strange$夸克：$0 < m_u = m_d \ll m_s$。 模型的预测随后与现有的格点QCD结果进行严格比较（其中介子筛选质量是从手征敏感度中提取的，这对应于适当插值算符的两点关联函数），特别是寻找在$U(1)$轴对称性在$T_c$以上被破坏的迹象。 显示英文摘要

摘要： In this work, expanding on previous analyses, we employ an effective Lagrangian approach to investigate the mass spectrum of scalar and pseudoscalar mesons at finite temperature, above the (pseudo-)critical temperature $T_c$, in a "realistic" $N_f = 2 + 1$ flavor scenario with degenerate $up$ and $down$ quarks and a heavier $strange$ quark: $0 < m_u = m_d \ll m_s$. The model's predictions are then critically compared with available lattice QCD results (where meson screening masses are extracted from chiral susceptibilities, which correspond to two-point correlation functions of suitable interpolating operators), looking, in particular, for signatures of the breaking of the $U(1)$ axial symmetry above $T_c$.