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Measurement of jet multiplicity distributions in t t-bar production in pp collisions at sqrt(s) = 7 TeV

Abstract : The normalised differential top quark-antiquark production cross section is measured as a function of the jet multiplicity in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector. The measurement is performed in both the dilepton and lepton+jets decay channels using data corresponding to an integrated luminosity of 5.0 inverse femtobarns. Using a procedure to associate jets to decay products of the top quarks, the differential cross section of the t t-bar production is determined as a function of the additional jet multiplicity in the lepton+jets channel. Furthermore, the fraction of events with no additional jets is measured in the dilepton channel, as a function of the threshold on the jet transverse momentum. The measurements are compared with predictions from perturbative quantum chromodynamics and no significant deviations are observed.
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http://hal.in2p3.fr/in2p3-00978263
Contributor : Sylvie Flores <>
Submitted on : Monday, April 14, 2014 - 7:17:09 AM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM

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S. Chatrchyan, S. Baffioni, F. Beaudette, P. Busson, C. Charlot, et al.. Measurement of jet multiplicity distributions in t t-bar production in pp collisions at sqrt(s) = 7 TeV. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2014, 74, pp.3014. ⟨10.1140/epjc/s10052-014-3014-0⟩. ⟨in2p3-00978263⟩

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