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Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s)=7 TeV

. (2012)cite arxiv:1208.2671Comment: Submitted to the Journal of High Energy Physics.

Abstract

The t t-bar production cross section (sigmat t-bar) is measured in proton-proton collisions at sqrt(s) = 7 TeV in data collected by the CMS experiment, corresponding to an integrated luminosity of 2.3 inverse femtobarns. The measurement is performed in events with two leptons (electrons or muons) in the final state, at least two jets identified as jets originating from b quarks, and the presence of an imbalance in transverse momentum. The measured value of sigmat t-bar for a top-quark mass of 172.5 GeV is 161.9 +/- 2.5(stat.) +5.1/-5.0 (syst.) +/- 3.6(lumi.) pb, consistent with the prediction of the standard model.

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Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s)=7 TeV

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