Delta(54) Flavor Model for Leptons and Sleptons

TL;DR

This paper develops a $ ext{Delta}(54) imes Z_2$ flavor model for leptons and sleptons, predicting neutrino mixing angles and analyzing SUSY breaking effects, with results consistent with current experimental bounds.

Contribution

It introduces a novel $ ext{Delta}(54) imes Z_2$ flavor symmetry model that reproduces tri-bimaximal mixing and predicts deviations, while also analyzing slepton sector flavor constraints.

Findings

Predicted upper bound for $ ext{sin} heta_{13}$ is 0.06.

Deviations in $ ext{sin} heta_{23}$ from maximal mixing are possible.

Flavor changing neutral currents are smaller than experimental bounds.

Abstract

We have studied $\Delta(54)\times Z_2$ flavor model for leptons and sleptons. The tri-bimaximal mixing can be reproduced for arbitrary neutrino masses if vacuum alignments of scalar fields are guaranteed. The deviation from the tri-bimaximal mixing of leptons is predicted. The predicted upper bound for $\sin\theta_{13}$ is 0.06. The magnitude of $\sin\theta_{23}$ could be deviated from the maximal mixing considerably, but $\sin\theta_{12}$ is hardly deviated from the tri-maximal mixing. We have also studied SUSY breaking terms in the slepton sector. Three families of left-handed and right-handed slepton masses are degenerate. Even although flavor symmetry breaking effects are taken into account, our model leads to smaller values of flavor changing neutral currents than the present experimental bounds.