How can CP violation in the neutrino sector be large in a $2\leftrightarrow 3$ symmetric model?

TL;DR

This paper explores how large CP violation can occur in a neutrino model with 2-3 symmetry broken by a phase, analyzing deviations from tribimaximal mixing under maximal CP violation.

Contribution

It introduces a neutrino mass matrix model where 2-3 symmetry is broken by a phase, examining its impact on CP violation and lepton mixing.

Findings

Large CP violation is possible in the model.

Deviations from tribimaximal mixing are analyzed.

The model predicts specific mixing patterns under maximal CP violation.

Abstract

Based on a neutrino mass matrix model in which a 2-3 symmetry is only broken by a phase parameter, it is investigated how the lepton mixing matrix can deviate from the so-called tribimaximal mixing under a condition that CP is maximally violated.