Searches for supersymmetry with the ATLAS detector using final states with two leptons and missing transverse momentum in √s=7 TeV proton–proton collisions
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Article history: Received 27 October 2011 Received in revised form 16 January 2012 Accepted 31 January 2012 Available online 3 February 2012 Editor: H. Weerts Results of three searches are presented for the production of supersymmetric particles decaying into final states with missing transverse momentum and exactly two isolated leptons, e or μ. The analysis uses a data sample collected during the first half of 2011 that corresponds to a total integrated luminosity of 1 fb−1 of √ s = 7 TeV proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider. Opposite-sign and same-sign dilepton events are separately studied, with no deviations from the Standard Model expectation observed. Additionally, in opposite-sign events, a search is made for an excess of same-flavour over different-flavour lepton pairs. Effective production cross sections in excess of 9.9 fb for opposite-sign events containing supersymmetric particles with missing transverse momentum greater than 250 GeV are excluded at 95% CL. For same-sign events containing supersymmetric particles with missing transverse momentum greater than 100 GeV, effective production cross sections in excess of 14.8 fb are excluded at 95% CL. The latter limit is interpreted in a simplified electroweak gaugino production model excluding chargino masses up to 200 GeV, under the assumption that slepton decay is dominant. © 2012 CERN. Published by Elsevier B.V. All rights reserved.
منابع مشابه
Searches for supersymmetry with the ATLAS detector using final states with two leptons and missing transverse momentum in √s=7 TeV proton–proton collisions
Citation Aad, G., B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, et al. “Searches for Supersymmetry with the ATLAS Detector Using Final States with Two Leptons and Missing Transverse Momentum in s = 7 TeV Proton–proton Collisions.” Physics Letters B 709, no. 3 (March 2012): 137–157. © 2012 CERN As Published http://dx.doi.org/10.1016/j.physletb.2012.01.076 Publisher E...
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تاریخ انتشار 2012