Fritzsch neutrino mass matrix from S3 symmetry

TL;DR

This paper proposes an S3 symmetry-based extension of the Standard Model that predicts a Fritzsch-type neutrino mass matrix, consistent with normal hierarchy and maximal CP violation, with specific predictions for the reactor angle.

Contribution

It introduces a novel S3 symmetry-based model that yields a Fritzsch-type neutrino mass matrix with specific phenomenological predictions.

Findings

Predicts sine squared of reactor angle as 0.01

Compatible only with normal hierarchy

Predicts maximal leptonic CP violation

Abstract

We present an extension of the Standard Model (SM) based on the discrete flavor symmetry S3 which gives a neutrino mass matrix with two-zero texture of Fritzsch-type and nearly diagonal charged lepton mass matrix. The model is compatible with the normal hierarchy only and predicts the sine squared of the reactor angle to be 0.01 at the best fit values of solar and atmospheric parameters and maximal leptonic CP violation.