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arXiv 1106.0974hep-lathep-ph
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重夸克区有限温度QCD的相结构

Phase structure of finite temperature QCD in the heavy quark region

H. Saito, S. Ejiri, S. Aoki, T. Hatsuda, K. Kanaya, Y. Maezawa, H. Ohno, T. Umeda

备注：
13 pages, 17 figures, 3 tables
发表信息：
Phys. Rev. D 84, 054502 (2011)
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摘要：

利用由平均元格概率分布函数定义的有效势，研究了重夸克区有限温度QCD相变对夸克质量的依赖性。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，表明相变是一级相变，而当夸克质量从无穷大开始减小时，一级相变转变为一个交叉.对于N_f= 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。

英文摘要：

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 N_f=1, 2, 3 and 2+1 cases. The quark mass dependence of the latent heat is also evaluated in the first order transition region.

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