Measurement of jet multiplicity distributions in t t-bar production in pp collisions at sqrt(s) = 7 TeV - Archive ouverte HAL Access content directly
Journal Articles European Physical Journal C: Particles and Fields Year : 2014

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

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S. Chatrchyan
  • Function : Author
S. Baffioni
P. Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
C. Collard
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini

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.

Dates and versions

in2p3-00978263 , version 1 (14-04-2014)

Identifiers

Cite

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, 2014, 74, pp.3014. ⟨10.1140/epjc/s10052-014-3014-0⟩. ⟨in2p3-00978263⟩
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