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arXiv 2212.07451hep-phhep-th
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有效场论的新协变 Feynman 规则

New Covariant Feynman Rules for Effective Field Theories

Gero von Gersdorff, Kevin Santos

AI总结:

本文提出一种明显规范协变的通用 Feynman 规则形式体系,结合背景场方法与热核计算任意圈阶的有效场论匹配,并提供 Mathematica 代码。

摘要:

我们提供了一种全新且完全通用的形式体系,用于以明显规范协变的方式计算在任意所需圈阶下积掉有质量场所产生的有效场论匹配贡献。该形式体系基于背景场方法和热核等旧有思想,但我们加入了若干关键的新要素,极大提升了方法的简洁性和普遍适用性。我们以 Feynman 规则的形式表述该方法,所得有效作用量以局部热核系数表示。我们还在补充材料中提供了一个 Mathematica 代码,以便于计算这些系数。

英文摘要:

We provide a new and completely general formalism to compute the effective field theory matching contributions from integrating out massive fields in a manifestly gauge covariant way, at any desired loop order. The formalism is based on old ideas such as the background field method and the heat kernel, however we add some crucial new ingredients that greatly improve the simplicity and general applicability of the approach. We formulate our method in terms of Feynman rules, the resulting effective action is expressed in terms of local heat kernel coefficients. We also provide as supplementary material a mathematica code that facilitates the computation of these coefficients.

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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