Bimaximal neutrino mixing and weak complementarity with S4 discrete symmetry

TL;DR

This paper reviews bimaximal neutrino mixing and introduces an S4 symmetry-based model to explain lepton mixing patterns, highlighting the potential of discrete symmetries in neutrino physics.

Contribution

It presents a new explicit model using S4 symmetry to realize bimaximal neutrino mixing, expanding the theoretical framework beyond tri-bimaximal patterns.

Findings

Bimaximal mixing can effectively describe neutrino oscillation data.

The S4 symmetry model successfully reproduces lepton mixing angles.

Discrete symmetries like S4 are promising in neutrino model building.

Abstract

The neutrino oscillation data are well explained by the tri-bimaximal pattern. Recently a paper appeared showing that also the bimaximal pattern could be a very good starting point in order to describe the lepton mixing. In this paper I review both the flavour structures and then I present an explicit model based on the discrete symmetry group S4.