Measurement of the top-antitop production cross section in the tau+jets channel in pp collisions at sqrt(s) = 7 TeV - Archive ouverte HAL Access content directly
Journal Articles European Physical Journal C: Particles and Fields Year : 2013

Measurement of the top-antitop production cross section in the tau+jets channel in pp collisions at sqrt(s) = 7 TeV

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

Abstract

The top-quark pair production cross section in 7 TeV centre-of-mass proton proton collisions is measured using data collected by the CMS detector at the LHC. The measurement uses events with one jet identified as a hadronically-decaying tau lepton and at least four additional energetic jets, at least one of which is identified as coming from a b quark. The analysed data sample corresponds to an integrated luminosity of 3.9 inverse femtobarns recorded by a dedicated multijet plus hadronically-decaying tau trigger. A neural network has been developed to separate the top-quark pairs from the W+jets and multijet backgrounds. The measured value of sigma(ttbar) = 152 +/- 2 (stat.) +/- 32 (syst.) +/- 3 (lum.) pb is consistent with the standard model predictions.

Dates and versions

in2p3-00780904 , version 1 (25-01-2013)

Identifiers

Cite

S. Chatrchyan, M. Besançon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Measurement of the top-antitop production cross section in the tau+jets channel in pp collisions at sqrt(s) = 7 TeV. European Physical Journal C: Particles and Fields, 2013, 73, pp.2386. ⟨10.1140/epjc/s10052-013-2386-x⟩. ⟨in2p3-00780904⟩
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