Measurement of the charge asymmetry in top quark pair production in pp collisions at s√=7 TeV using the ATLAS detector
Author(s)Taylor, Frank E
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A measurement of the top-antitop production charge asymmetry A[subscript C] is presented using data corresponding to an integrated luminosity of 1.04 fb[superscript −1] of pp collisions at 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 t[bar over t] event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of A[subscript C] is A[subscript C]=−0.019±0.028 (stat.)±0.024 (syst.), consistent with the prediction from the MC@NLO Monte Carlo generator of A[subscript C]=0.006±0.002. Measurements of A[subscript C] in two ranges of invariant mass of the top-antitop pair are also shown.
DepartmentMassachusetts Institute of Technology. Department of Physics
The European Physical Journal C
The ATLAS Collaboration et al. “Measurement of the Charge Asymmetry in Top Quark Pair Production in Pp Collisions at √s=7 TeV Using the ATLAS Detector.” The European Physical Journal C 72.6 (2012): n. pag. © 2012 CERN for the benefit of the ATLAS collaboration
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