Supersymmetry and LHC Missing Energy Signals

TL;DR

This paper investigates how LHC missing energy signals can be consistent with electroweak supersymmetry models, aligning collider data with dark matter and muon anomaly observations.

Contribution

It demonstrates compatibility of LHC electroweak signals with dark matter constraints and muon g-2, providing analytical tools for parameter space analysis.

Findings

Compatibility of LHC signals with dark matter relic density

Alignment with dark matter direct detection bounds

Consistency with muon anomalous magnetic moment measurements

Abstract

Current analyses of the LHC data put stringent bounds on strongly interacting supersymmetric particles, restricting the masses of squarks and gluinos to be above the TeV scale. However, the supersymmetric electroweak sector is poorly constrained. In this article we explore the consistency of possible LHC missing energy signals with the broader phenomenological structure of the electroweak sector in low energy supersymmetry models. As an example, we focus on the newly developed Recursive Jigsaw Reconstruction analysis by ATLAS, which reports interesting event excesses in channels containing di-lepton and tri-lepton final states plus missing energy. We show that it is not difficult to obtain compatibility of these LHC data with the observed dark matter relic density, the bounds from dark matter direct detection experiments, and the measured anomalous magnetic moment of the muon. We provide analytical expressions which can be used to understand the range of gaugino masses, the value of the Higgsino mass parameter, the heavy Higgs spectrum, the ratio of the Higgs vacuum expectation values $\tan \beta$, and the slepton spectrum obtained in our numerical analysis of these observables.