The impact of the ATLAS zero-lepton, jets and missing momentum search on a CMSSM fit

TL;DR

This paper assesses how recent ATLAS zero-lepton search data constrains the CMSSM by updating global fits with new likelihood maps, leading to higher predicted scalar and gaugino masses.

Contribution

It introduces a method to incorporate ATLAS search likelihoods into CMSSM fits, refining the parameter space considering systematic uncertainties.

Findings

ATLAS data extends supersymmetry exclusion limits.

Likelihood re-weighting shifts preferred CMSSM parameters to higher masses.

The approach validates against ATLAS 95% confidence level contours.

Abstract

Recent ATLAS data significantly extend the exclusion limits for supersymmetric particles. We examine the impact of such data on global fits of the constrained minimal supersymmetric standard model (CMSSM) to indirect and cosmological data. We calculate the likelihood map of the ATLAS search, taking into account systematic errors on the signal and on the background. We validate our calculation against the ATLAS determinaton of 95% confidence level exclusion contours. A previous CMSSM global fit is then re-weighted by the likelihood map, which takes a bite at the high probability density region of the global fit, pushing scalar and gaugino masses up.