Electroweak Supersymmetry around the Electroweak Scale

TL;DR

This paper proposes a model of electroweak supersymmetry with specific mass hierarchies that align with current experimental constraints, aiming to address dark matter and gauge unification.

Contribution

It introduces a viable electroweak supersymmetry framework within GmSUGRA, detailing parameter spaces consistent with phenomenological constraints and dark matter relic density.

Findings

Electroweak supersymmetry can be realized with TeV-scale squarks and gluinos.

Dark matter relic density achieved via neutralino-stau coannihilation.

Benchmark points satisfying current experimental constraints are provided.

Abstract

Inspired by the phenomenological constraints, LHC supersymmetry and Higgs searches, dark matter search as well as string model building, we propose the electroweak supersymmetry around the electroweak scale: the squarks and/or gluinos are around a few TeV while the sleptons, sneutrinos, bino and winos are within one TeV. The Higgsinos can be either heavy or light. We consider bino as the dominant component of dark matter candidate, and the observed dark matter relic density is achieved via the neutralino-stau coannihilations. Considering the Generalized Minimal Supergravity (GmSUGRA), we show explicitly that the electroweak supersymmetry can be realized, and the gauge coupling unification can be preserved. With two Scenarios, we study the viable parameter spaces that satisfy all the current phenomenological constraints, and we present the concrete benchmark points. Furthermore, we comment on the fine-tuning problem and LHC searches.