Constraints on the pMSSM from searches for squarks and gluinos by ATLAS

TL;DR

This paper evaluates how ATLAS searches for squarks and gluinos constrain the pMSSM parameter space, excluding most models with certain mass ranges and suggesting improvements for future searches.

Contribution

It provides a comprehensive analysis of ATLAS SUSY search impacts on the pMSSM, identifying less sensitive spectra and proposing search strategy enhancements.

Findings

99% of flat prior models excluded by ATLAS results

All models with squarks and gluinos below 600 GeV are excluded

Proposed extensions to jets search channel to improve sensitivity

Abstract

We study the impact of the jets and missing transverse momentum SUSY analyses of the ATLAS experiment on the phenomenological MSSM (pMSSM). We investigate sets of SUSY models with a flat and logarithmic prior in the SUSY mass scale and a mass range up to 1 and 3 TeV, respectively. These models were found previously in the study 'Supersymmetry without Prejudice'. Removing models with long-lived SUSY particles, we show that 99% of 20000 randomly generated pMSSM model points with a flat prior and 87% for a logarithmic prior are excluded by the ATLAS results. For models with squarks and gluinos below 600 GeV all models of the pMSSM grid are excluded. We identify SUSY spectra where the current ATLAS search strategy is less sensitive and propose extensions to the inclusive jets search channel.