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.
Highlights
Supersymmetry (SUSY) [1,2,3,4,5,6,7,8,9] is a generalization of space-time symmetries that predicts new bosonic partners for the fermions and new fermionic partners for the bosons of the Standard Model (SM)
This paper provides a summary of the results from inclusive searches for gluinos and first- and second-generation squarks performed by ATLAS, using data from proton-proton collisions at a centre-of-mass energy of 8 TeV collected during Run 1 of the Large Hadron Collider (LHC)
The mGMSB model is described by six parameters: the SUSY-breaking mass scale felt by the low-energy sector (Λ), the mass of the SUSY breaking messengers (Mmess), the number of SU(5) messenger fields (N5), tan β, μ and the gravitino coupling scale factor (Cgrav) which determines the lifetime of the next-to-lightest SUSY particle (NLSP)
Summary
Supersymmetry (SUSY) [1,2,3,4,5,6,7,8,9] is a generalization of space-time symmetries that predicts new bosonic partners for the fermions and new fermionic partners for the bosons of the Standard Model (SM). This paper provides a summary of the results from inclusive searches for gluinos and first- and second-generation squarks performed by ATLAS, using data from proton-proton (pp) collisions at a centre-of-mass energy of 8 TeV collected during Run 1 of the LHC. In order to differentiate strongly produced SUSY events from the SM background, the searches typically require high ETmiss due to the presence of the LSP and possibly neutrinos, several high-pT jets and large deposited transverse energy. They are further classified according to the presence of leptons and b-jets.
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