A Stealth Supersymmetry Sampler

TL;DR

This paper explores models of Stealth Supersymmetry that produce collider signatures with minimal missing energy, challenging traditional detection methods and providing new avenues for supersymmetry searches at the LHC.

Contribution

It introduces various Stealth Supersymmetry models, clarifies their mechanisms, and discusses their differences from compressed supersymmetry, including new classes with baryon portal or Z' interactions.

Findings

Updated LHC limits on stealth supersymmetry models.

Identification of new stealth model classes with baryon portal or Z' interactions.

Clarification of the stealth mechanism and its distinction from compressed supersymmetry.

Abstract

The LHC has strongly constrained models of supersymmetry with traditional missing energy signatures. We present a variety of models that realize the concept of Stealth Supersymmetry, i.e. models with R-parity in which one or more nearly-supersymmetric particles (a "stealth sector") lead to collider signatures with only a small amount of missing energy. The simplest realization involves low-scale supersymmetry breaking, with an R-odd particle decaying to its superpartner and a soft gravitino. We clarify the stealth mechanism and its differences from compressed supersymmetry and explain the requirements for stealth models with high-scale supersymmetry breaking, in which the soft invisible particle is not a gravitino. We also discuss new and distinctive classes of stealth models that couple through a baryon portal or Z' gauge interactions. Finally, we present updated limits on stealth supersymmetry in light of current LHC searches.