Search for supersymmetry in final states with b-jets and missing transverse energy with the ATLAS detector

Searches for supersymmetric particles in events with large missing transverse momentum, heavy flavour jet candidates and no lepton or one leptons (e,m) in √s=7 TeV proton proton collisions are presented. In a data sample corresponding to an integrated luminosity of 0.83 fb-1 (for no lepton), 1.03 fb−1 (for one lepton) recorded by the ATLAS experiment at the Large Hadron Collider, no significant excesses are observed with respect to the prediction for Standard Model processes. For R-parity conserving models in which sbottoms or stops are the only squarks to appear in the gluino decay cascade, gluino masses below 720 (for no lepton, sbottom decay) and 570 GeV (for one lepton, stop decay) are excluded at the 95% CL.