Search for direct chargino production in anomaly-mediated supersymmetry breaking models based on a disappearing-track signature in pp collisions at root √s̅=7 TeV with the ATLAS detector

• Published in: The journal of high energy physics 2013 (1), p.131
• Main Authors: Buanes, Trygve, Burgess, Thomas, Eigen, Gerald, Kastanas, Alex, Liebig, Wolfgang, Lipniacka, Anna, Rosendahl, Peter Lundgaard, Sandaker, Heidi, Sjursen, Therese B, Stugu, Bjarne Sandvik, Tonoyan, Arshak, Ugland, Maren, Bugge, Lars, Buran, Torleiv, Cameron, David Gordon, Czyczula, Zofia, Gjelsten, Børge Kile, Gramstad, Eirik, Lund, Esben, Ould-Saada, Farid, Pajchel, Katarina, Pylypchenko, Yuriy, Read, Alexander Lincoln, Røhne, Ole Myren, Samset, Bjørn Hallvard, Smestad, Lillian, Stapnes, Steinar, Strandlie, Are, Aad, Georges, Abajyan, Tatevik, Abbott, Brad, Abdallah, Jalal, Abdel Khalek, Samah, Abdelalim, Ahmed Ali, Abdesselam, Abdel, Abdinov, Ovsat Bahram oglu, Abi, Babak, Abolins, Maris, AbouZeid, Hass, Abramowicz, Halina, Abreu, Henso, Acerbi, Emilio, Adams, David, Addy, Tetteh N, Adelman, Jareed, Adomeit, Stefanie, Adragna, Paolo, Adye, Tim, Aefsky, Scott Alan, Aharrouche, Mohamed, ATLAS, Collaboration
• Format: Article
• Language: English
• Subjects: Hadron-Hadron Scattering
• ISSN: 1029-8479; 1126-6708; 1029-8479
• DOI: 10.1007/JHEP01(2013)131

A search for direct chargino production in anomaly-mediated supersymmetry breaking scenarios is performed in p p collisions at root 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.