Search for contact interactions in dilepton events from pp collisions at √s = 7 TeV with the ATLAS detector
Author(s)Taylor, Frank E.
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This Letter presents a search for contact interactions in the dielectron and dimuon channels using data from proton–proton collisions produced by the LHC at √s = 7 TeV and recorded by the ATLAS detector. The data sample, collected in 2011, corresponds to an integrated luminosity of 1.08 and 1.21 fb[superscript −1] in the e[superscript +]e[superscript −] and μ[superscript +]μ[superscript −] channels, respectively. No significant deviations from the standard model are observed. Using a Bayesian approach with a prior flat in [1 over Λ[superscript 2]], the following 95% CL lower limits are placed on the energy scale of ℓℓqq contact interactions: Λ[superscript −]>10.1 TeV(Λ[superscript +]>9.4 TeV) in the electron channel and Λ[superscript −]>8.0 TeV (Λ[superscript +]>7.0 TeV) in the muon channel for constructive (destructive) interference in the left–left isoscalar contact interaction model. Limits are also provided for a prior flat in [1 over Λ[superscript 4]].
DepartmentMassachusetts Institute of Technology. Department of Physics
Physics Letters B
Aad, G., B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, et al. “Search for Contact Interactions in Dilepton Events from Pp Collisions at √s = 7 TeV with the ATLAS Detector.” Physics Letters B 712, no. 1–2 (May 2012): 40–58. © 2012 CERN
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