Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

Abstract

A measurement of the top-antitop production charge asymmetry A_C is presented using data corresponding to an integrated luminosity of 1.04 fb^-1 of pp collisions at sqrt(s) = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the ttbar event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of A_C is A_C = -0.018 +/- 0.028 (stat.) +/- 0.023 (syst.), consistent with the prediction from the MC@NLO Monte Carlo generator of A_C = 0.006 +/- 0.002. Measurements of A_C in two ranges of invariant mass of the top-antitop pair is also shown.

16 pages plus cover page plus author list (31 pages total), 6 figures, 3 tables, revised author list, matches published version in European Physical Journal C

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Cited by in corpus (11)

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• Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC
• Forward Tevatron Tops and Backward LHC Tops with Associates
• First measurement of the charge asymmetry in beauty-quark pair production at a hadron collider
• Massive Spin-2 States as the Origin of the Top Quark Forward-Backward Asymmetry
• Top Quark Forward-Backward Asymmetry and $W^{\prime }$-Boson with General Couplings
• Top Quark Asymmetries and Unparticle Physics
• The ttbar asymmetry in the Standard Model and beyond
• Experimental Studies of Top Quark Production
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