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arXiv 2012.05630hep-ph
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用偶极过程约束四费米子有效相互作用的味

Using dipole processes to constrain the flavour of four-fermion effective interactions

L. Vale Silva, S. Jäger, K. Leslie

摘要:

偶极相互作用编码了各种各样的现象,例如夸克和轻子扇区中的辐射衰变和电偶极矩,它们探测了标准模型之外的物理学,直到非常高的能量尺度;由于重整化,非偶极算符混合到偶极算符中,因此可能产生可以通过这些相同现象研究的可观察效应。我考虑四个费米子接触相互作用,其中主导秩序混合成偶极子发生在两个循环(即,当单圈效应消失时),并且这种混合可以避免小的Yukawa耦合,然后探索来自新物理学的味道和$ \mathbf{CP} $违反的唯象后果。

英文摘要:

Dipole interactions encode a rich variety of phenomena, such as radiative decays and electric dipole moments in both quark and lepton sectors, which probe physics beyond the Standard Model up to very high energy scales; due to renormalization, non-dipole operators mix into dipole ones, thus possibly generating observable effects that can be investigated by those same phenomena. I consider four-fermion contact interactions for which the leading order mixing into dipoles happens at two-loops (i.e., when one-loop effects vanish) and for which this mixing can avoid small Yukawa couplings, and then explore the phenomenological consequences for flavour and $ \mathbf{CP} $ violation coming from New Physics.

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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