Search for direct chargino production in anomaly-mediated supersymmetry breaking models based on a disappearing-track signature, in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector at the LHC

A search for direct chargino production in anomaly-mediated supersymmetry breaking (AMSB) scenarios is performed using 4.7 fb−1 data of pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment. In AMSB models, the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. The pT spectrum of candidate tracks is found to be consistent with the expectation from the Standard Model background processes, and constraints on the chargino properties are obtained.