  A search for direct chargino production in anomaly-mediated supersymmetry
breaking scenarios is performed in pp collisions at sqrt(s) = 7 TeV using 4.7
fb^-1 of data collected with the ATLAS experiment at the LHC. In these models,
the lightest chargino is predicted to have a lifetime long enough to be
detected in the tracking detectors of collider experiments. This analysis
explores such models by searching for chargino decays that result in tracks
with few associated hits in the outer region of the tracking system. The
transverse-momentum spectrum of candidate tracks is found to be consistent with
the expectation from the Standard Model background processes and constraints on
chargino properties are obtained.
