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

Abstract : The t t-bar production cross section (sigma[t 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 sigma[t 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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Article dans une revue
Journal of High Energy Physics, Springer, 2012, 11(2012), pp.067. <10.1007/JHEP11(2012)067>


http://hal.in2p3.fr/in2p3-00723843
Contributeur : Sylvie Flores <>
Soumis le : mardi 14 août 2012 - 16:52:15
Dernière modification le : mercredi 27 juillet 2016 - 14:48:48

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S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s)=7 TeV. Journal of High Energy Physics, Springer, 2012, 11(2012), pp.067. <10.1007/JHEP11(2012)067>. <in2p3-00723843>

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