Leptophobic $Z^\prime$ bosons in the secluded UMSSM

TL;DR

This paper analyzes a secluded UMSSM model where a leptophobic $Z'$ boson can evade current collider bounds, allowing for light dark matter candidates and potential discovery at future colliders.

Contribution

It demonstrates that the $Z'$ boson can be leptophobic without kinetic mixing, introduces light singlinos as dark matter candidates, and explores prospects for detection at 27 TeV colliders.

Findings

Leptophobic $Z'$ can evade current LHC bounds.

Light singlinos serve as viable dark matter candidates.

Potential $Z'$ detection at future 27 TeV colliders.

Abstract

We perform a comprehensive analysis of the secluded UMSSM model, consistent with present experimental constraints. We find that in this model the additional $Z^\prime$ gauge boson can be leptophobic without resorting to gauge kinetic mixing and, consequently, also $d$-quark-phobic, thus lowering the LHC bounds on its mass. The model can accommodate very light singlinos as DM candidates, consistent with present day cosmological and collider constraints. Light charginos and neutralinos are responsible for muon anomalous magnetic predictions within 1$\sigma$ of the measured experimental value. Finally, we look at the possibility that a lighter $Z^\prime$, expected to decay mainly into chargino pairs and followed by the decay into lepton pairs, could be observed at 27 TeV.