Seesaw neutrino masses from an $A_4$ model with two equal vacuum expectation values

TL;DR

This paper proposes an $A_4$ symmetry-based model with two equal Higgs vacuum expectation values that predicts neutrino masses and mixing consistent with experimental observations.

Contribution

It introduces a novel $A_4$ model with equal Higgs VEVs, providing specific predictions for the neutrino mass matrix.

Findings

Predictions align with current neutrino data

Model constrains neutrino mass hierarchy and mixing angles

Provides a framework for understanding neutrino mass origin

Abstract

We present a model for the lepton sector, with $A_4$ horizontal-symmetry group, in which two of the Higgs doublets in an $A_4$ triplet of Higgs doublets have equal vacuum expectation values. The model makes well-defined predictions for the effective light-neutrino Majorana mass matrix. We show that those predictions are compatible with the experimental data.