An $A_5$ inverse seesaw model with perturbed golden ratio mixing

TL;DR

This paper introduces an $A_5$ symmetry-based inverse seesaw model that explains lepton masses and mixings, predicting correlations among mixing angles and CP phase, with a perturbed golden ratio pattern.

Contribution

It presents a novel $A_5$ discrete symmetry model incorporating an inverse seesaw mechanism and a perturbed golden ratio mixing pattern for leptons.

Findings

Predicts $ heta_{13}$ and other mixing angles from the model.

Establishes strong correlations between leptonic mixing observables.

Provides a framework consistent with observed lepton mass hierarchies.

Abstract

We propose a theory based on the $A_5$ discrete group which successfully accounts for lepton masses and mixings. In the proposed model, the neutrino masses arise from an inverse seesaw mechanism. The leptonic mixing consists in a perturbed golden ratio mixing pattern with a strong correlation arising between the leptonic mixing observables, which can be expressed as $\theta_{13}$ predicting the other mixing angles and the Dirac CP phase.