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arXiv 2008.03728hep-thgr-qc
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四维软量子电动力学的二维共形场论

Two Dimensional Conformal Field Theory from Soft Quantum Electrodynamics in Four Dimensions

Shehab Fadda, Shin'ichi Nojiri

摘要:

本文提出了二维共形场论对四维量子电动力学(QED)中软模的有效作用。这有两个方面的动机。首先,我们激励的概念,使用路径积分形式主义的软模式的有效行动。其次,通过注意壳层上规范固定QED作用量的变换,我们推导出必要的边界条件和相应的形式的反项,支配IR部门。我们回顾推导软沃德高桥恒等式使用路径积分的方法,并提供了一个替代的推导,遵循从大规格变化的QED行动。因为我们的有效作用量是共形理论的作用量,所以我们计算了相关的中心荷。

英文摘要:

In this work, we propose an effective action of the two-dimensional conformal field theory for the Soft modes appearing in Quantum ElectroDynamics (QED) in 4 dimensions. This is motivated in two ways. First, we motivate the notion of an effective action for the Soft modes using the path integral formalism. Second, by noting the transformations of the on-shell gauge-fixed QED action, we deduce necessary boundary conditions and the corresponding form of the counter-terms that govern the IR sector. We review a derivation of the Soft Ward-Takahashi identity using path integral methods and offer an alternative derivation that follows from the large-gauge variations of the QED action. Because our effective action is that of a conformal theory, we calculate the relevant central charge.

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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