Revisiting the LHC Constraints on Gauge-Mediated Supersymmetry Breaking Scenarios

TL;DR

This paper reevaluates LHC constraints on Gauge-Mediated Supersymmetry Breaking scenarios, highlighting the impact of decay assumptions on SUSY particle mass limits and providing a more comprehensive interpretation of experimental data.

Contribution

It introduces a reinterpretation of ATLAS LHC data for GGM models, accounting for all decay modes and challenging previous assumptions used in SUSY searches.

Findings

Certain decay width assumptions significantly affect SUSY mass bounds.

Reinterpreted LHC constraints show broader allowed parameter space.

Realistic decay mode considerations are crucial for accurate SUSY limits.

Abstract

Supersymmetry (SUSY) addresses several problems of the Standard Model, such as the naturalness problem and gauge coupling unification, and can provide cosmologically viable dark matter candidates. SUSY must be broken at high energy scales with mechanisms like gravity, anomaly, gauge mediation, etc. This paper revisits the Gauge Mediated SUSY Breaking (GMSB) scenarios in the context of data from the Large Hadron Collider (LHC) experiment. The ATLAS mono-photon search at 139 inverse femtobarn integrated luminosity at the 13 TeV LHC, in the context of a simplified General Gauge Mediation (GGM) scenario (which is a phenomenological version of GMSB with an agnostic approach to the nature of the hidden sector), relies on assumptions that do not hold across the entire parameter space. We identify a few crucial assumptions regarding the decay widths of SUSY particles into final states with gravitinos that affect the LHC limits on the masses of the SUSY particles. Our study aims to reinterpret the ATLAS constraints on the gluino-NLSP mass plane, considering all possible decay modes of SUSY particles in a realistic GGM model.