Phenomenology of S_4 Flavor Symmetric extra U(1) model

TL;DR

This paper explores a supersymmetric E_6 inspired model with S_4 flavor symmetry, addressing flavor issues, baryon asymmetry, and dark matter, and identifies specific mass ranges for particles consistent with observations.

Contribution

It introduces a novel S_4 flavor symmetric U(1) model that alleviates SUSY flavor problems and explains baryon asymmetry and dark matter within a unified framework.

Findings

Allowed lightest chargino mass range: 100-140 GeV

Dark matter candidate: singlino dominated neutralino (~36 GeV)

Baryon asymmetry achieved via leptogenesis without gravitino overproduction

Abstract

We study several phenomenologies of an E_6 inspired extra U(1) model with S_4 flavor symmetry. With the assignment of left-handed quarks and leptons to S_4-doublet, SUSY flavor problem is softened. As the extra Higgs bosons are neutrinophilic, baryon number asymmetry in the universe is realized by leptogenesis without causing gravitino overproduction. We find that the allowed region for the lightest chargino mass is given by 100-140 GeV, if the dark matter is a singlino dominated neutralino whose mass is about 36 GeV.