A SUSY A4 model for fermion masses and mixings

TL;DR

This paper presents a supersymmetric A4 flavor symmetry model that successfully explains fermion masses and mixings, predicts tribimaximal leptonic mixing, and addresses the vacuum alignment problem.

Contribution

It introduces a novel SUSY A4 model that achieves realistic fermion mass spectra and mixing angles, including tribimaximal leptonic mixing, with a solution to the vacuum alignment issue.

Findings

Predicts tribimaximal leptonic mixing.

Top quark Yukawa at renormalizable level.

Addresses vacuum alignment problem.

Abstract

We study a supersymmetric extension of the Standard Model based on discrete A4xZ3xZ4 flavor symmetry. We obtain quark mixing angles as well as a realistic fermion mass spectrum and we predict tribimaximal leptonic mixing by a spontaneous breaking of A4. The top quark Yukawa interaction is present at the renormalizable level in the superpotential while all the other Yukawa interactions arise only at higher orders. We study the Higgs potential and show that it can potentially solve the so called vacuum alignment problem. The leading order predictions are not spoiled by subleading corrections.