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arXiv 1012.1478hep-phhep-th
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用全息术研究反常QCD对外场德拜屏蔽的贡献

Anomalous QCD Contribution to the Debye Screening in an External Field via Holography

A. Gorsky, P. N. Kopnin, A. Krikun

摘要:

本文讨论了在有外磁场B存在下,有限温度下退禁闭QCD等离子体中的QCD对Abel Debye质量和磁屏蔽质量的贡献。我们在AdS Schwarzenkeld黑洞背景中使用了全息AdS/QCD装置,并证明了电屏蔽质量具有类似于QED中的单圈结果的形式。此外,我们还计算了磁场对B各阶的修正,并证明了当磁场较大时,德拜质量随B线性增长,而磁屏蔽质量则为零。磁场的整个效应原来是源于陈-西蒙斯作用。我们还讨论了手征微扰理论中零温度的情形。

英文摘要:

In this paper we discuss the QCD contribution to the Abelian Debye and magnetic screening masses in a deconfined QCD plasma at finite temperature in the presence of an external magnetic field B. We use a holographic AdS/QCD setup in an AdS Schwarzschield black hole background and show that the electric screening mass has a form similar to the one-loop result in QED. Moreover, we calculate the corrections due to the magnetic field to all orders of B and demonstrate that in the case when magnetic field is large the Debye mass grows linearly with B, while the magnetic screening mass vanishes. The whole effect of the magnetic field turns out to stem from the Chern-Simons action. We also discuss the zero temperature case in the chiral perturbation theory.

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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