Interpreting a 1 fb^-1 ATLAS Search in the Minimal Anomaly Mediated Supersymmetry Breaking Model

TL;DR

This paper analyzes LHC data to interpret exclusion limits for supersymmetric particles within the minimal anomaly mediated supersymmetry breaking (mAMSB) model, extending previous interpretations beyond the CMSSM.

Contribution

It compares kinematic distributions of supersymmetric signals in CMSSM and mAMSB models and derives new mass exclusion limits for squarks and gluinos in mAMSB.

Findings

Lower limit of 900 GeV on squark and gluino masses at 95% CL.

Comparison of signal distributions between CMSSM and mAMSB models.

Extension of exclusion limits to the mAMSB framework.

Abstract

Recent LHC data significantly extend the exclusion limits for supersymmetric particles, particularly in the jets plus missing transverse momentum channels. The most recent such data have so far been interpreted by the experiment in only two different supersymmetry breaking models: the constrained minimal supersymmetric standard model (CMSSM) and a simplified model with only squarks and gluinos and massless neutralinos. We compare kinematical distributions of supersymmetric signal events predicted by the CMSSM and anomaly mediated supersymmetry breaking (mAMSB) before calculating exclusion limits in mAMSB. We obtain a lower limit of 900 GeV on squark and gluino masses at the 95% confidence level for the equal mass limit, tan(beta)=10 and mu>0.