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arXiv 2311.09288hep-phhep-ex
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U(2) 对轻子为右、对夸克为左

U(2) is Right for Leptons and Left for Quarks

Stefan Antusch, Admir Greljo, Ben A. Stefanek, Anders Eller Thomsen

AI总结:

本文提出用最小破缺的 U(2)_{q+e} 味对称性解释费米子质量与混合模式,并通过 SMEFT 分析表明该对称性使带电轻子味破坏成为近期实验可探测的重要探针。

摘要:

我们假定费米子质量与混合中观测到的不同模式源于一个最小破缺的 $\mathrm{U}(2)_{q+e}$ 味对称性,该对称性作用于左手夸克和右手带电轻子,在可重整化层次上产生一个偶然的 $\mathrm{U}(2)^5$ 对称性,而无需对 Weinberg 算符施加选择定则。我们通过显式例子证明该对称性可以被一致地规范,并评论了在 $\mathrm{SU}(5)$ 大统一中的实现方式。通过模型无关的 SMEFT 分析,我们发现由 $\mathrm{U}(2)_{q+e}$ 产生的选择定则增强了带电轻子味破坏作为探针的重要性,而在这方面预计近期会有显著的实验进展。

英文摘要:

We posit that the distinct patterns observed in fermion masses and mixings are due to a minimally broken $\mathrm{U}(2)_{q+e}$ flavor symmetry acting on left-handed quarks and right-handed charged leptons, giving rise to an accidental $\mathrm{U}(2)^5$ symmetry at the renormalizable level without imposing selection rules on the Weinberg operator. We show that the symmetry can be consistently gauged by explicit examples and comment on realizations in $\mathrm{SU}(5)$ unification. Via a model-independent SMEFT analysis, we find that selection rules due to $\mathrm{U}(2)_{q+e}$ enhance the importance of charged lepton flavor violation as a probe, where significant experimental progress is expected in the near future.

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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