Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV

dc.creatorAnduaga, Xabier Sebastián
dc.creatorDova, María Teresa
dc.creatorMonticelli, Fernando Gabriel
dc.creatorTripiana, Martín Fernando
dc.creatorThe ATLAS Collaboration
dc.date2012
dc.date2019-11-01T17:58:13Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/84669
dc.identifierissn:1434-6044
dc.descriptionIn models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos which result in tracks that appear to have few associated hits in the outer region of the tracking system. The search was based on data corresponding to an integrated luminosity of 1.02 fb− 1collected with the ATLAS detector in 2011. The pT spectrum of candidate tracks is found to be consistent with the expectation from Standard Model background processes and constraints on the lifetime and the production cross section were obtained. In the minimal AMSB framework with m3/2< 32 TeV, m0< 1.5 TeV, tanβ = 5 and μ > 0, a chargino having mass below 92 GeV and a lifetime between 0.5 ns and 2 ns is excluded at 95 % confidence level.
dc.descriptionLa lista completa de autores que integran el documento puede consultarse en el archivo.
dc.descriptionInstituto de Física La Plata
dc.formatapplication/pdf
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.subjectFísica
dc.subjectsupersymmetry: symmetry breaking
dc.subjectp p: scattering
dc.subjectmediation: anoma
dc.titleSearch for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV
dc.typeArticulo
dc.typeArticulo


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