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arXiv 1206.3128hep-ph
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Wess-Zumino-Witten action和手征磁效应产生的光子

Wess-Zumino-Witten action and photons from the Chiral Magnetic Effect

Kenji Fukushima, Kazuya Mameda

摘要:

本文利用手征拉格朗日量重新讨论了手征磁效应。我们证明了CME的电流公式是直接从Wess-Zumino-Witten作用的接触部分导出的。这意味着如果观测到CME,它可能是局域宇称破坏的一个标志,但它既不是夸克解除禁闭的直接证据,也不是手征恢复的直接证据。我们还讨论了逆手征磁普里马科夫效应,即通过与CME相关的顶点产生实光子,这在运动学上是可能的,适用于时空非均匀的磁场位形和强θ角。我们对光子产额作了定性估计,发现它与热光子相当。

英文摘要:

We revisit the Chiral Magnetic Effect (CME) using the chiral Lagrangian. We demonstrate that the electric-current formula of the CME is derived immediately from the contact part of the Wess-Zumino-Witten action. This implies that the CME could be, if observed, a signature for the local parity violation, but a direct evidence for neither quark deconfinement nor chiral restoration. We also discuss the reverse Chiral Magnetic Primakoff Effect, i.e. the real photon production through the vertex associated with the CME, which is kinematically possible for space-time inhomogeneous configurations of magnetic fields and the strong theta angle. We make a qualitative estimate for the photon yield to find that it comparable to the thermal photon.

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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