Collider constraints on electroweakinos in the presence of a light gravitino

Abstract Using the global fitting framework, we constrain MSSM with an eV-scale gravitino as lightest supersymmetric particle, and six electroweakinos (neutralinos charginos) only other light new states. We combine 15 ATLAS 12 CMS searches at 13 TeV, along a large collection of measurements Standard Model signatures. This model, which refer to $${{\tilde{G}}}$$ G ~ -EWMSSM, exhibits quite varied collider phenomenology due its many permitted electroweakino production processes decay modes. Characteristic -EWMSSM signal events have two or more bosons missing energy escaping gravitinos. While much parameter space is excluded, find several viable regions that predict phenomenologically rich scenarios multiple neutralinos charginos within kinematic reach LHC during Run 3, High Luminosity LHC. In particular, identify Higgsino-dominated 140 GeV are consistent our combined set measurements. The full samples input files generated for this work available via .