Flavor structure from flavored Higgs mixing

TL;DR

This paper proposes a model where mixing among flavored Higgs doublets in a decoupling limit generates realistic flavor structures in Yukawa couplings, with all elements determined by a renormalizable potential.

Contribution

It introduces a simple flavored Higgs mixing model with a specific mass matrix in a $U(2)_L imes U(2)_R$ framework, providing a way to derive Yukawa matrices from the Higgs potential.

Findings

Yukawa couplings acquire flavor dependence through Higgs mixing.

All Yukawa matrix elements are calculable from the Higgs potential.

The model offers a new approach to flavor structure in particle physics.

Abstract

In this paper, we suggest a simple model which induces realistic flavor structure from mixing of flavored Higgs doublets. The idea is based on the decoupling limit. In a model with many Higgs doublets, the mass eigenstates of scalars are linear combinations of Higgs doublets. If the mass matrix of Higgs fields has only one massless mode, and if the linear combination has flavor dependence, the induced Yukawa coupling will have nontrivial flavor structure. We suggest a mass matrix of flavored Higgs fields in a $U(2)_{L} \times U(2)_{R}$ toy model. An advantage of this model is that all of the elements in Yukawa matrix can be determined from renormalizable Higgs potential.