Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-06-05
EPJC 9 (2011) 1721
Physics
High Energy Physics
High Energy Physics - Experiment
Scientific paper
10.1140/epjc/s10052-011-1721-3
A measurement of the top-antitop production cross section in proton-proton collisions at a centre-of-mass energy of 7 TeV has been performed at the LHC with the CMS detector. The analysis uses a data sample corresponding to an integrated luminosity of 36 inverse picobarns and is based on the reconstruction of the final state with one isolated, high transverse-momentum electron or muon and three or more hadronic jets. The kinematic properties of the events are used to separate the top-antitop signal from W+jets and QCD multijet background events. The measured cross section is 173 + 39 - 32 (stat. + syst.) pb, consistent with standard model expectations.
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