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arXiv 1302.3228hep-phnucl-th
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双圈硬热圈微扰理论计算夸克数磁化率

Quark Number Susceptibilities from Two-Loop Hard Thermal Loop Perturbation Theory

Najmul Haque, Munshi G. Mustafa, Michael Strickland

摘要:

我们利用最近得到的夸克和胶子等离子体的双圈硬热圈微扰理论热力学函数,计算对角二阶和四阶夸克数可调性。在夸克化学势与温度之比较小的情况下,所用的双圈硬热圈微扰理论热力学函数是可靠的。利用这一结果,我们能够得到在硬热圈微扰理论中的领先和次领先阶夸克数的(半)解析表达式。我们比较了硬热环微扰理论与微扰量子色动力学计算结果,一个Polyakov环Nambu-Jona-Lasinio模型计算,晶格量子色动力学结果。

英文摘要:

We use the recently obtained two-loop hard thermal loop perturbation theory thermodynamics functions of a plasma of quarks and gluons to compute the diagonal second- and fourth-order quark number susceptibilities. The two-loop hard thermal loop perturbation theory thermodynamic functions used are reliable in the limit that the ratio of the quark chemical potential to temperature is small. Using this result, we are able to obtain (semi-)analytic expressions for the quark number susceptibilities at leading- and next-to-leading-order in hard thermal loop perturbation theory. We compare the hard thermal loop perturbation theory results with perturbative quantum chromodynamics calculations, a Polyakov-loop Nambu-Jona-Lasinio model calculation, and lattice quantum chromodynamics results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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