Bimaximal mixing and large theta13 in a SUSY SU(5) model based on S4

TL;DR

This paper proposes a SUSY SU(5) model based on the S4 symmetry group that naturally predicts a large theta13 neutrino mixing angle consistent with recent experimental data, while also accurately reproducing quark mixing and mass hierarchies.

Contribution

The paper introduces a novel SUSY SU(5) model with S4 symmetry that predicts a large theta13 and aligns with current neutrino and quark data, improving upon previous models.

Findings

Predicts a large theta13 of order lambdaC

Reproduces CKM matrix entries and quark mass hierarchies

Compatible with recent neutrino oscillation data

Abstract

The recent analyses of the world neutrino data, including the T2K and MINOS results, point toward a statistically significant deviation of theta13 from zero. In this paper we present a SUSY SU(5) model based on the discrete S4 group which predicts a large theta13 of order lambdaC, lambdaC being the Cabibbo angle. The other mixing angles in the neutrino sector are all compatible with current experimental data. In the quark sector, the entries of the CKM mixing matrix as well as the mass hierarchies in both up and down quark sectors are well reproduced and only a small enhancement is needed to reproduce lambdaC.