# Search for contact interactions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

6 Laboratoire de Physique Corpusculaire
LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
9 APC - Neutrinos
LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies, APC (UMR_7164) - AstroParticule et Cosmologie
Abstract : 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 sqrt(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^-1 in the e+ e- and mu+ mu- channels, respectively. No significant deviations from the standard model are observed. Using a Bayesian approach with a prior flat in 1/Lambda^2, the following 95% CL lower limits are placed on the energy scale of llqq contact interactions: Lambda^- > 10.1 TeV (Lambda^+ > 9.4 TeV) in the electron channel and Lambda^- > 8.0 TeV (Lambda^+ > 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/Lambda^4.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00653696
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, December 20, 2011 - 8:35:34 AM
Last modification on : Monday, January 4, 2021 - 12:14:17 PM

### Citation

G. Aad, S. Albrand, M.L. Andrieux, Q. Buat, B. Clement, et al.. Search for contact interactions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physics Letters B, Elsevier, 2012, 712, pp.40-58. ⟨10.1016/j.physletb.2012.04.026⟩. ⟨in2p3-00653696⟩

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