Summary of the searches for squarks and gluinos using $\sqrt{s}$ = 8 TeV pp collisions with the ATLAS experiment at the LHC

TL;DR

This paper summarizes ATLAS searches for gluinos and squarks at 8 TeV, combining previous analyses and new results to set mass limits, with no significant excess over Standard Model predictions.

Contribution

It provides new interpretations and statistical combinations of existing analyses, along with a new analysis, to improve constraints on supersymmetric particles.

Findings

Gluino mass limits exceed 1150 GeV at 95% CL for certain models.

Exclusion limits are set for various supersymmetry and extra dimension models.

No significant excess over Standard Model expectations was observed.

Abstract

A summary is presented of ATLAS searches for gluinos and first- and second-generation squarks in final states containing jets and missing transverse momentum, with or without leptons or b-jets, in the $\sqrt{s}$ = 8 TeV data set collected at the Large Hadron Collider in 2012. This paper reports the results of new interpretations and statistical combinations of previously published analyses, as well as a new analysis. Since no significant excess of events over the Standard Model expectation is observed, the data are used to set limits in a variety of models. In all the considered simplified models that assume R-parity conservation, the limit on the gluino mass exceeds 1150 GeV at 95% confidence level, for an LSP mass smaller than 100 GeV. Furthermore, exclusion limits are set for left-handed squarks in a phenomenological MSSM model, a minimal Supergravity/Constrained MSSM model, R-parity-violation scenarios, a minimal gauge-mediated supersymmetry breaking model, a natural gauge mediation model, a non-universal Higgs mass model with gaugino mediation and a minimal model of universal extra dimensions.