A Natural Higgs Mass in Supersymmetry from Non-Decoupling Effects

TL;DR

This paper proposes a model called Dirac NMSSM where two singlets with a Dirac mass enhance the Higgs mass without sacrificing naturalness, addressing fine-tuning issues in supersymmetry.

Contribution

It introduces a novel supersymmetric extension with Dirac singlets that increases the Higgs mass while preserving naturalness despite large SUSY breaking effects.

Findings

The Dirac NMSSM can raise the Higgs mass without fine-tuning.

Modified Higgs phenomenology is predicted in this scenario.

The model maintains naturalness even with significant SUSY breaking.

Abstract

The Higgs mass implies fine-tuning for minimal theories of weak scale supersymmetry (SUSY). Non-decoupling effects can boost the Higgs mass when new states interact with the Higgs, but new sources of SUSY breaking that accompany such extensions threaten naturalness. We show that two singlets with a Dirac mass can increase the Higgs mass while maintaining naturalness in the presence of large SUSY breaking in the singlet sector. We explore the modified Higgs phenomenology of this scenario, which we call the "Dirac NMSSM."