A new study has re-examined the constraints imposed by the Large Hadron Collider (LHC) on supersymmetry (SUSY), focusing on the electroweak-ino sector. Using public data from ATLAS Run 2 searches, researchers employed the SModelS v3.0 tool to reproduce and extend the original analysis, also incorporating results from the CMS experiment. This work is crucial for understanding which regions of the vast SUSY parameter space remain unexplored or are compatible with current observations.

The ATLAS collaboration recently published an extensive scan of the phenomenological Minimal Supersymmetric Standard Model (pMSSM), with a particular focus on electroweak-inos, which are the supersymmetric partners of gauge and Higgs bosons. This scan aimed to determine how searches for electroweak production of SUSY particles in LHC Run 2 constrained this model. The simulation data (SLHA files) and the constraints from eight individual searches were made publicly available, allowing other research groups to validate and expand upon the results.

The research team used this data to evaluate the capability of SModelS v3.0 to replicate the ATLAS constraints. Furthermore, they explored how the inclusion of CMS results alters the picture and what benefits are gained from the statistical combination of analyses from both experiments. The results underscore the need for a broad, multifaceted approach to maximize sensitivity and close loopholes in the extensive SUSY parameter space. The study also discusses the part of the parameter space with light electroweak-inos that remains valid despite the stringent LHC limits, indicating that supersymmetry is not ruled out, but its manifestations might be more subtle than anticipated.