Yukawaon model and unified description of quark and lepton mass matrices

TL;DR

This paper explores the yukawaon model to unify quark and lepton mass matrices, deriving nearly tribimaximal mixing without discrete symmetries by assuming a simple up-quark mass matrix form.

Contribution

It presents a unified approach to quark and lepton masses using yukawaons, deriving tribimaximal mixing without discrete symmetries.

Findings

Derived nearly tribimaximal mixing in lepton sector

Unified description of quark and lepton mass matrices

No discrete symmetry assumed in lepton sector

Abstract

In the so-called yukawaon model, where effective Yukawa coupling constants Y_f^{eff} (f=e,\nu,u,d) are given by vacuum expectation values of gauge singlet scalars (yukawaons) Y_f with 3\times 3 flavor components, it is tried to give a unified description of quark and lepton mass matrices. Especially, without assuming any discrete symmetry in the lepton sector, nearly tribimaximal mixing is derived by assumed a simple up-quark mass matrix form.