arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2401.12401hep-thhep-ph
收藏

探索QED规范场中的磁涨落效应:对质量生成的影响

Exploring magnetic fluctuations effects in QED gauge fields: implications for mass generation

Jorge David Castaño-Yepes, Enrique Muñoz

AI总结:

本文在强场极限下计算了白噪声随机磁涨落背景中光子与胶子极化张量的单圈贡献,发现其破坏U(1)对称性并诱导出有效磁质量,揭示了一种噪声依赖的色散介质效应。

摘要:

在这项工作中,我们计算了在具有白噪声随机涨落的经典背景磁场存在下,光子(和胶子)极化张量的单圈贡献。磁场涨落以准粒子图像的形式被纳入费米子传播子中,该图像是我们先前使用复制技巧(replica trick)发展出来的。通过聚焦于强场极限,我们在此明确计算了极化张量。我们的结果表明,它不满足Ward恒等式所概述的横向性条件,从而破坏了U(1)对称性。因此,在光子四动量趋于零的极限下,张量系数表明这些随机涨落诱导光子(和胶子)产生了一个有效磁质量,从而将其解释为一种具有依赖于噪声的折射率的色散介质。

英文摘要:

In this work, we calculate the one-loop contribution to the polarization tensor for photons (and gluons) in the presence of a classical background magnetic field with white-noise stochastic fluctuations. The magnetic field fluctuations are incorporated into the fermion propagator in a quasi-particle picture, which we developed in previous works using the {\it replica trick}. By focusing on the strong-field limit, here we explicitly calculate the polarization tensor. Our results reveal that it does not satisfy the transversality conditions outlined by the Ward identity, thus breaking the $U(1)$ symmetry. As a consequence, in the limit of vanishing photon four-momenta, the tensor coefficients indicate the emergence of an effective magnetic mass induced on photons (and gluons) by these stochastic fluctuations, leading to the interpretation of a dispersive medium with a noise-dependent index of refraction.

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。

↑