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arXiv 2404.00516hep-phhep-ex
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5+3味弱有效理论中的电偶极矩

Electric Dipole Moments in 5+3 Flavor Weak Effective Theory

Jacky Kumar, Emanuele Mereghetti

AI总结:

本文在5夸克味+3轻子味的CP破坏弱有效场论中系统推导了电偶极矩的主公式,包含QCD/QED跑动、双圈修正和阈值效应,并应用于约束希格斯玻色子的汤川耦合。

摘要:

本文在CP破坏且味守恒的弱有效场论(WET)框架下,对包含五种夸克味和三种轻子味的电偶极矩(EDMs)进行了完全通用的处理。我们系统分析了电弱尺度与约2 GeV低能尺度之间由QCD和QED重整化群跑动所产生的电偶极矩主导贡献。我们包含了完整的单圈反常维度矩阵以及一部分双圈修正,并考虑了底夸克、粲夸克和τ轻子质量处的阈值修正。这使得我们能够在通用WET参数空间中推导出中子与质子电偶极矩、抗磁原子电偶极矩以及分子电偶极矩实验中所约束的进动频率的主公式,并由此提取出对电子电偶极矩的限制。特别地,我们的主公式完整包含了带有重夸克和重轻子味的WET CP破坏算符的贡献。作为应用,我们在电弱对称性破缺的线性实现和非线性实现两种情形下,研究了电偶极矩对希格斯玻色子汤川耦合的约束。

英文摘要:

A fully generic treatment of electric dipole moments (EDMs) is presented in the CP-violating and flavor-conserving weak effective field theory (WET) with five flavors of quarks and three flavors of leptons. We systematically analyze leading contributions to EDMs originating from QCD and QED renormalization group running between the electroweak scale and low energy scales of about 2 GeV. We include the full one-loop anomalous dimension and a subset of two-loop corrections, as well as threshold corrections at the bottom, charm and $τ$ masses. This allows us to derive master formulae in the space of generic WET for the neutron and proton EDMs, for EDMs of diamagnetic atoms, and the precession frequencies constrained in molecular EDM experiments, from which bounds on the electron EDM are extracted. In particular, our master formulae capture the contributions of WET CP-violating operators with heavy quark and lepton flavors. As an application, we study EDM constraints on the Yukawa couplings of the Higgs boson, in both the linear and non-linear realizations of electroweak symmetry breaking.

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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