Search for gluinos in events with two same-sign leptons, jets and missing transverse momentum with the ATLAS detector in $pp$ collisions at $\sqrt{s}=$7~TeV

A search for gluinos using events with two same-sign leptons, jets and missing transverse momentum is presented. The analysis uses a data sample corresponding to an integrated luminosity of 2.05~\ifb\ of proton-proton collisions, delivered by the Large Hadron Collider at a center-of-mass energy of 7~TeV and recorded by the ATLAS detector. No excess beyond the Standard Model expectation is observed in data and limits at 95\% confidence level are derived in the MSUGRA/CMSSM framework and for simplified models where the gluino decays via the supersymmetric partner of the top quark. In those scenarios, gluino masses below 550~GeV are excluded while masses up to 750~GeV can also be excluded depending on the model parameters.