Yukawa interactions, flavor symmetry, and non-canonical K\"{a}hler potential

TL;DR

This paper explores how non-canonical fermion kinetic terms and flavor symmetries in the standard model can explain the hierarchy of fermion masses and mixing, suggesting the Kähler potential as a key to new physics.

Contribution

It proposes that hierarchical flavor structures may originate from non-canonical kinetic terms influenced by flavor symmetries, offering a new perspective on fermion mass generation.

Findings

Hierarchical flavor structures can arise from non-canonical kinetic terms.

Flavor symmetry may be hidden in non-unitary bases.

Kähler potential structure could reveal new physics insights.

Abstract

We study the origin of fermion mass hierarchy and flavor mixing in the standard model, paying attention to flavor symmetries and fermion kinetic terms. There is a possibility that the hierarchical flavor structure of quarks and charged leptons originates from non-canonical types of fermion kinetic terms in the presence of flavor symmetric Yukawa interactions. A flavor symmetry can be hidden in the form of non-unitary bases in the standard model. The structure of K\"{a}hler potential can become a touchstone of new physics.