SUSY search with two same-sign leptons and jets with the ATLAS detector using 21 fb$^{-1}$ of pp collisions at 8 TeV

A search for the production of supersymmetric particles decaying into final states with jets, bjets,\nmissing transverse momentum and two isolated leptons, e or $\mu$, with the same electric charge\n(same-sign leptons) is presented. The analysis uses a data sample collected during 2012, which\ncorresponds to a total integrated luminosity of 20.7 fb$^{-1}$ of $\sqrt s$ = 8 TeV proton - proton collisions recorded with the ATLAS detector at the Large Hadron Collider. Three signal regions, depending on number of b-jets in the final state are defined to search for the strong production of SUSY particles. No deviation from the Standard Model expectation is observed. Exclusion limits are\nderived for a mSUGRA/CMSSM model, for which the parameters are chosen in such a way that\nthe Higgs mass is compatible with the recent discovery of a Higgs-like particle at the LHC, and for\na wide variety of simplified models of supersymmetry. The result significantly extends previous\nexclusion limits from several searches for Supersymmetry.