Measurement of the top-antitop production cross section in the tau+jets channel in pp collisions at sqrt(s) = 7 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules 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

S. Chatrchyan
  • Function : Author
Pierre Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier
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)

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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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