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arXiv 1504.07532hep-phnucl-th
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QCD + QED的Euler-Heisenberg-Weiss action

Euler-Heisenberg-Weiss action for QCD+QED

Sho Ozaki, Takashi Arai, Koichi Hattori, Kazunori Itakura

摘要:

本文利用Schwinger的本征时间方法导出了零温和有限温下QCD+QED单圈有效作用量的解析表达式。结果不仅对电磁场和色电磁场而且对Polyakov圈都是一个非线性有效作用量,从而再现了QED、QCD和QED+QCD中的Euler-Heisenberg作用量,也再现了有限温度下Polyakov圈的Weiss势。作为这种Euler-Heisenberg-Weiss作用量在QCD+QED中的应用,我们研究了零温下QCD+QED场诱导的夸克对产生和强电磁场存在下的Polyakov圈。夸克单圈对Polyakov圈有效势的贡献明显破坏了中心对称性,并且被发现被磁场增强,这与格点量子色动力学模拟中观察到的逆磁催化一致.

英文摘要:

We derive an analytic expression for one-loop effective action of QCD+QED at zero and finite temperatures by using the Schwinger's proper time method. The result is a nonlinear effective action not only for electromagnetic and chromo-electromagnetic fields but also the Polyakov loop, and thus reproduces the Euler-Heisenberg action in QED, QCD, and QED+QCD, and also the Weiss potential for the Polyakov loop at finite temperature. As applications of this "Euler-Heisenberg-Weiss" action in QCD+QED, we investigate quark pair productions induced by QCD+QED fields at zero temperature and the Polyakov loop in the presence of strong electromagnetic fields. Quark one-loop contribution to the effective potential of the Polyakov loop explicitly breaks the center symmetry, and is found to be enhanced by the magnetic field, which is consistent with the inverse magnetic catalysis observed in lattice QCD simulation.

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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