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arXiv 1607.05729hep-thmath-phmath.MP
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图消与QED的规范依赖性

Diagrammatic Cancellations and the Gauge Dependence of QED

Henry Kißler, Dirk Kreimer

摘要:

这封信探讨了一般线性规范中量子电动力学(QED)的图形取消。这些取消结合费曼图的各种拓扑结构,并提供了一种方法来重建规范依赖的电子传播的结果,一个特定的规范通过一个线性戴森-Schwinger方程。我们使用这种方法结合维数正则化来演示如何3圈$ε$ -展开的费曼规范确定$ε$ -展开的所有规范参数依赖项4圈。

英文摘要:

This letter examines diagrammatic cancellations for Quantum Electrodynamics (QED) in the general linear gauge. These cancellations combine Feynman graphs of various topologies and provide a method to reconstruct the gauge dependence of the electron propagator from the result of a particular gauge by means of a linear Dyson-Schwinger equation. We use this method in combination with dimensional regularization to demonstrate how the 3-loop $ε$-expansion in the Feynman gauge determines the $ε$-expansions for all gauge parameter dependent terms to 4 loops.

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