Neutrino Mixing and CP Phase Correlations

TL;DR

This paper explores deviations from a specific neutrino mass matrix model that predicts maximal mixing angles and CP violation, analyzing how these deviations align with recent radiative inverse seesaw neutrino mass models.

Contribution

It investigates natural deviations from a well-known neutrino mass matrix form within a radiative inverse seesaw framework.

Findings

Deviation from the $ heta_{23} = rac{\pi}{4}$ and $\delta_{CP} = rac{\pi}{2}$ predictions occurs naturally.

The model accommodates current experimental data on neutrino mixing angles and CP phase.

Provides insights into the structure of neutrino mass matrices under symmetry and radiative corrections.

Abstract

A special form of the $3 \times 3$ Majorana neutrino mass matrix derivable from $\mu - \tau$ interchange symmetry accompanied by a generalized $CP$ transformation was obtained many years ago. It predicts $\theta_{23} = \pi/4$ as well as $\delta_{CP} = \pm \pi/2$, with $\theta_{13} \neq 0$. Whereas this is consistent with present data, we explore a deviation of this result which occurs naturally in a recent proposed model of radiative inverse seesaw neutrino mass.