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

被引：8

作者：

Antusch, Stefan ^{[1
]}

Greljo, Admir ^{[1
]}

Stefanek, Ben A. ^{[2
]}

Thomsen, Anders Eller ^{[3
]}

机构：

[1] Univ Basel, Dept Phys, Klingelberg Str 82, CH-4056 Basel, Switzerland

[2] Kings Coll London, Phys Dept, Strand, London WC2R 2LS, England

[3] Univ Bern, Inst Theoret Phys, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 15期

基金：

瑞士国家科学基金会;

关键词：

FLAVOR; VIOLATION;

D O I：

10.1103/PhysRevLett.132.151802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We posit that the distinct patterns observed in fermion masses and mixings are due to a minimally broken U ( 2 ) q + e flavor symmetry acting on left-handed quarks and right-handed charged leptons, giving rise to an accidental 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 SU(5) unification. Via a model -independent analysis of a standard model viewed as an effective field theory, we find that selection rules due to 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.

引用

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