论文标题
在有限温度下手性有效拉格朗日模型中的QCD轴轴和拓扑敏感性
QCD axion and topological susceptibility in chiral effective Lagrangian models at finite temperature
论文作者
论文摘要
In this work we compute the axion mass and, from this (exploiting a well-known relation), we also derive an expression for the QCD topological susceptibility in the finite-temperature case, both below and above the chiral phase transition at $T_c$, making use of a chiral effective Lagrangian model which includes the axion, the scalar and pseudoscalar mesons and implements the $U(1)$ axial anomaly of the基本理论。我们还提供了$ t = 0 $（在三种光夸克风味的物理情况下）的拓扑敏感性的数值估计，并讨论了高温方向上拓扑敏感性的温度和夸克质量依赖性问题。
In this work we compute the axion mass and, from this (exploiting a well-known relation), we also derive an expression for the QCD topological susceptibility in the finite-temperature case, both below and above the chiral phase transition at $T_c$, making use of a chiral effective Lagrangian model which includes the axion, the scalar and pseudoscalar mesons and implements the $U(1)$ axial anomaly of the fundamental theory. We also provide a numerical estimate of the topological susceptibility at $T=0$ (in the physical case of three light quark flavors) and discuss the question of the temperature and quark-mass dependence of the topological susceptibility in the high-temperature regime.
