A minimal seesaw model with mu-tau symmetry

TL;DR

This paper presents a minimal lepton flavor model combining type I seesaw, Z_2, mu-tau, and CP symmetries, successfully fitting neutrino oscillation data and predicting neutrino mass scales and neutrinoless double beta decay parameters.

Contribution

It introduces a novel minimal flavor model with specific symmetries that accurately describes neutrino data and predicts key neutrino properties.

Findings

Fits neutrino oscillation data well

Predicts neutrino mass hierarchy and scale

Provides estimates for neutrinoless double beta decay mass

Abstract

We analyse a flavour model for a lepton sector which is based on type I seesaw mechanism, a Z_2 symmetry for lepton flavours, a mu-tau interchange symmetry and a CP symmetry. This model fits well the data of neutrino mass squared differences and oscillation angles. The model predicts an overall neutrino mass scale for normal and inverted neutrino mass hierarchy and the effective mass m_beta, which is used in the neutrinoless double beta decay.