A search for direct chargino production in anomaly-mediate d supersymmetry breaking scenarios is performed in pp collisions at √ s = 7 TeV using 4.7 fb − 1 of data collected with the ATLAS experiment at the LHC. In these mode ls, the lightest chargino is predicted to have a lifetime long enough to be detected in t he tracking detectors of collider experiments. This analysis explores such models b y searching for chargino decays that result in tracks with few associated hits in the outer re gion of the tracking system. The transverse-momentum spectrum of candidate tracks is fo und to be consistent with the expectation from the Standard Model background processes a nd constraints on chargino properties are obtained.

G. Aad, T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, et al. (2013). Search for direct chargino production in anomaly-mediated supersymmetry breaking models based on a disappearing-track signature in pp collisions at $ \sqrt{s}=7\;\mathrm{TeV} $ with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2013, 131-1-131-34 [10.1007/JHEP01(2013)131].

Search for direct chargino production in anomaly-mediated supersymmetry breaking models based on a disappearing-track signature in pp collisions at $ \sqrt{s}=7\;\mathrm{TeV} $ with the ATLAS detector

BELLAGAMBA, LORENZO;BERTIN, ANTONIO;BOSCHERINI, DAVIDE;BRUNI, ALESSIA;BRUNI, GRAZIANO;CAFORIO, DAVIDE;DE CASTRO, STEFANO;DI SIPIO, RICCARDO;FABBRI, LAURA;FRANCHINI, MATTEO;GIACOBBE, BENEDETTO;MASSA, IGNAZIO GIACOMO;MENGARELLI, ALBERTO;MONZANI, SIMONE;