Unified description of quark and lepton mixing matrices based on a Yukawaon model

TL;DR

This paper presents a supersymmetric Yukawaon model with O(3) symmetry that unifies quark and lepton mixing matrices, achieving a better fit to observed data by introducing a new origin of CP violation.

Contribution

It introduces a novel Yukawaon model that systematically describes quark and lepton mixing matrices with improved data fitting capabilities.

Findings

Successfully fits quark mixing matrices to observed data.

Achieves nearly tribimaximal lepton mixing consistent with observations.

Proposes a different origin of CP violation from previous models.

Abstract

Based on a supersymmetric Yukawaon model with O(3) family symmetry, possible forms of quark and lepton mixing matrices are systematically investigated under a condition that the up-quark mass matrix form leads to the observed nearly tribimaximal mixing in the lepton sector. Although the previous model could not provide a good fitting of the observed quark mixing, the present model can give a reasonably good fitting not for lepton mixing but also the quark mixing by using a different origin of the $CP$ violation from one in the previous model.