Phase structure of finite temperature QCD in the heavy quark region
Phase structure of finite temperature QCD in the heavy quark region
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DOI：
10.1103/physrevd.84.054502
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发表时间：
2011-06
影响因子：
5
通讯作者：
H. Saito;S. Ejiri;S. Aoki;T. Hatsuda;K. Kanaya;Y. Maezawa;H. Ohno;T. Umeda
中科院分区：
文献类型：
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作者：
H. Saito;S. Ejiri;S. Aoki;T. Hatsuda;K. Kanaya;Y. Maezawa;H. Ohno;T. Umeda
我们研究了在重夸克区有限温度QCD相变的夸克质量依赖性，使用的有效势通过平均元格的概率分布函数定义。在SU（3）纯规范理论的模拟中，我们首先确认了分布函数在重夸克极限下有两个峰值，表明相变是一级相变，而随着夸克质量从无穷大开始减小，一级相变变成了一个交叉，其中分布函数的质量依赖性是用重加权方法结合跳跃参数展开计算的.对于Nf = 1，2，3和2 + 1的情形，我们确定了一阶过渡区的端点。在一级跃迁区还计算了潜热与夸克质量的关系。
We study the quark mass dependence of the finite temperature QCD phase transition in the heavy quark region using an effective potential defined through the probability distribution function of the average plaquette. Performing a simulation of SU(3) pure gauge theory, we first confirm that the distribution function has two peaks indicating that the phase transition is of first order in the heavy quark limit, while the first order transition turns into a crossover as the quark mass decreases from infinity, where the mass dependence of the distribution function is evaluated by the reweighting method combined with the hopping parameter expansion. We determine the endpoint of the first order transition region for Nf = 1, 2, 3 and 2 + 1 cases. The quark mass dependence of the latent heat is also evaluated in the first order transition region.