Probing texture zeros with scaling ansatz in inverse seesaw

TL;DR

This paper explores the implications of texture zeros and scaling ansatz in inverse seesaw models for neutrino masses, classifying possible matrices and analyzing their phenomenological viability, especially regarding CP violation and mass ordering.

Contribution

It systematically classifies neutrino mass matrices with texture zeros and scaling ansatz in inverse seesaw models, identifying viable categories and their phenomenological constraints.

Findings

Maximum of four zeros in $m_D$ and $$ for viable models

All viable cases have inverted mass ordering

Predicted very small CP violation, testable in future experiments

Abstract

We investigate neutrino mass matrix phenomenology involving scaling ansatz and texture zeros adhering inverse seesaw mechanism. It is seen that four is the maximum number of zeros in $m_D$ and $\mu$ to obtain viable phenomenology. Depending upon the generic nature of the effective neutrino mass matrices we classify all the emerged matrices in four categories. One of them is ruled out phenomenologically due to inappropriate value of reactor mixing angle after breaking of the scaling ansatz. The mass ordering is inverted in all cases. One of the distinguishable feature of all these categories is the vanishingly small value of CP violation measure $J_{CP}$ due to small value of $\delta_{CP}$. Thus those categories will be ruled out if CP violation is observed in the leptonic sector in future experiments.