Higgs Boson Mass in Low Scale Gauge Mediation Models

TL;DR

This paper explores low scale gauge mediation models with ultra-light gravitinos, proposing extensions that reconcile the observed Higgs boson mass of ~125 GeV with the light gravitino constraint.

Contribution

It introduces two extensions—singlet Higgs sector and strongly coupled gauge mediation—that allow explaining the Higgs mass without gravitino overproduction.

Findings

Large parameter space identified for Higgs mass ~125 GeV

Extensions resolve conflict between light gravitino and heavy SUSY particles

Models avoid gravitino over-production problem

Abstract

We consider low scale gauge mediation models with a very light gravitino m_{3/2}~16 eV, in the light of recent experimental hints on the Higgs boson mass. The light gravitino is very interesting since there is no gravitino over-production problem, but it seems difficult to explain the Higgs boson mass of ~125 GeV. This is because of the conflict between the light gravitino mass and heavy SUSY particle masses needed for producing the relatively heavy Higgs boson mass. We consider two possible extensions in this paper: a singlet extension of the Higgs sector, and strongly coupled gauge mediation. We show that there is a large parameter space, in both scenarios, where the Higgs boson mass of ~125 GeV is explained without any conflict with such a very light gravitino.