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arXiv 0710.4237hep-lat
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全QCD中静态夸克的自由能和重整化Polyakov圈

Free energy of static quarks and the renormalized Polyakov loop in full QCD

K. Petrov

摘要:

我们提出的结果,从一个详细的研究在全QCD与现实的夸克质量的单重自由能。本文采用改进的Polyakov圈非微扰重整化方案,比较了不同味含量的QCD的温度依赖性。我们还分析了筛选质量提取的单重态自由能在各种温度接近和以上的QCD转变温度。我们的结论是,屏蔽质量的温度依赖性很好地描述了微扰理论的非微扰前因子。一个有效的运行耦合已被确定为所有的温度值提供额外的洞察屏蔽现象在高温下。

英文摘要:

We present results from a detailed study of singlet free energies in full QCD with realistic quark masses. An improved scheme for the non-perturbative renormalization of the Polyakov loop is used and we compare its temperature dependence for QCD with different flavor content. We also analyze screening masses extracted from singlet free energies at various temperatures close to and above the QCD transition temperature. We conclude that the temperature dependence of screening masses is well described by perturbation theory up to a non-perturbative pre-factor. An effective running coupling has been determined for all temperature values giving additional insight into screening phenomena at high temperature.

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