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arXiv 2202.01225hep-phhep-th
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单圈基变换中瞬逝算符的简单规则

Simple Rules for Evanescent Operators in One-Loop Basis Transformations

Jason Aebischer, Andrzej J. Buras, Jacky Kumar

AI总结:

本文提出通过计算瞬逝算符引起的移位,在一般时空维中系统完成单圈基变换的简单方法,并以 BMU 到 JMS 基的变换为例验证其应用。

摘要:

基变换通常涉及仅在 $D=4$ 维中成立的 Fierz 关系及其他关系。然而,在一般的 $D$ 个时空维中,为了保持这些恒等式,必须引入瞬逝算符。这类瞬逝算符会对单圈基变换以及双圈重整化群演化产生贡献。我们提出了一个简单程序,说明如何通过获取瞬逝算符导致的移位,在单圈层级系统性地进行基变换。作为示例,我们应用该方法推导了从适用于 NLO QCD 计算的 BMU(Buras、Misiak 和 Urban)基,到用于与 SMEFT 匹配的 JMS(Jenkins、Manohar 和 Stoffer)基之间的单圈基变换。

英文摘要:

Basis transformations often involve Fierz and other relations which are only valid in $D=4$ dimensions. In general $D$ space-time dimensions however, evanescent operators have to be introduced, in order to preserve such identities. Such evanescent operators contribute to one-loop basis transformations as well as to two-loop renormalization group running. We present a simple procedure on how to systematically change basis at the one-loop level by obtaining shifts due to evanescent operators. As an example we apply this method to derive the one-loop basis transformation from the BMU (Buras, Misiak and Urban) basis useful for NLO QCD calculations, to the JMS (Jenkins, Manohar and Stoffer) basis used in the matching to the SMEFT.

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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