Measurements of the t t-bar charge asymmetry using the dilepton decay channel in pp collisions at sqrt(s) = 7 TeV

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• [ ref:BernChargeAsym

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• This paper presents the first measurements of A C A_{\mathrm{C}} and A C lep A^{\text{lep}}_{\mathrm{C}} in the dilepton final state, using data from pp collisions at s = 7 \sqrt{s}=7 \TeV

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• The analysis described in this paper uses a complementary data sample to that used in

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• [ semileptonicCMS

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• The central feature of the CMS apparatus is a superconducting solenoid, 13 m in length and 6 \unit

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• Events are selected using triggers that require the presence of at least two leptons (electrons or muons) with transverse momentum ( \pt

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• Selections are applied to reject events other than from \ttbar

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• Simulated \ttbar

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• For both signal and background events, additional \Pp

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• The trigger efficiency for dilepton events that satisfy the selection criteria is determined using a tag-and-probe method [ wzPAS2010

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• The backgrounds from events with a jet misidentified as a lepton and from Drell–Yan production are estimated using both data- and simulation-based techniques. The results agree within their uncertainties. The simulation is chosen as the method to predict the yields and distributions of the backgrounds, with systematic uncertainties based on a comparison with the data-based estimates. Contributions to the background from single-top-quark and diboson events are estimated from simulation alone. Recent measurements from the CMS Collaboration [ ref:singletop

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• The background with at least one misidentified lepton (non-dileptonic \ttbar

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