标题： 3味QCD中的手征临界点 显示英文标题

标题： The Chiral Critical Point in 3-Flavour QCD

摘要： 我们确定了在有限温度下3味QCD轻夸克质量区域中出现的一阶相变线的二阶端点，并分析了该手征临界点的普遍性质。 对Binder累积量以及能量类和序参量类可观测量的联合概率分布的详细分析确认，该手征临界点属于三维伊辛模型的普遍性类。 通过使用改进的规范作用和交错费米子作用的计算，我们估计当赝标介子质量小于约200 MeV时，相变是一阶的。 显示英文摘要

摘要： We determine the second order endpoint of the line of first order phase transitions, which occur in the light quark mass regime of 3-flavour QCD at finite temperature, and analyze universal properties of this chiral critical point. A detailed analysis of Binder cumulants and the joint probability distributions of energy like and ordering-field like observables confirms that the chiral critical point belongs to the universality class of the three dimensional Ising model. From a calculation with improved gauge and staggered fermion actions we estimate that the transition is first order for pseudo-scalar meson masses less than about 200 MeV.