Sgoldstino-Higgs mixing in models with low-scale supersymmetry breaking

TL;DR

This paper explores how mixing between sgoldstinos and Higgs bosons in low-scale supersymmetry models can significantly influence Higgs phenomenology and potentially explain LEP excesses around 98 GeV.

Contribution

It introduces the impact of sgoldstino-Higgs mixing in low-scale SUSY models and its phenomenological implications, including the explanation of LEP excesses.

Findings

Sgoldstino-Higgs mixing can alter Higgs boson properties.

Sgoldstino can explain LEP excess at 98 GeV.

Mixing effects are phenomenologically significant.

Abstract

We consider a supersymmetric extension of the Standard Model with low-scale supersymmetry breaking. Besides usual superpartners it contains additional chiral goldstino supermultiplet whose scalar components - sgoldstinos can mix with scalars from the Higgs sector of the model. We show that this mixing can have considerable impact on phenomenology of the lightest Higgs boson and scalar sgoldstino. In particular, the latter can be a good candidate for explanation of 2-sigma LEP excess with mass around 98 GeV.