# Measurement of the top quark pair cross section with ATLAS in pp collisions at sqrt(s) = 7 TeV using final states with an electron or a muon and a hadronically decaying tau lepton

4 Laboratoire de Physique Corpusculaire
LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
Abstract : A measurement of the cross section of top quark pair production in proton-proton collisions recorded with the ATLAS detector at the LHC at a centre-of-mass energy of 7 TeV is reported. The data sample used corresponds to an integrated luminosity of 2.05 fb^-1. Events with an isolated electron or muon and a tau lepton decaying hadronically are used. In addition, a large missing transverse momentum and two or more energetic jets are required. At least one of the jets must be identified as originating from a b quark. The measured cross section, sigma_ttbar = 186+/- 13 (stat) +/- 20 (syst) +/- 7 (lum.) pb is in good agreement with the Standard Model prediction.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00695821
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Submitted on : Thursday, May 10, 2012 - 7:59:12 AM
Last modification on : Thursday, December 16, 2021 - 2:11:29 PM

### Citation

G. Aad, S. Albrand, Q. Buat, B. Clement, J. Collot, et al.. Measurement of the top quark pair cross section with ATLAS in pp collisions at sqrt(s) = 7 TeV using final states with an electron or a muon and a hadronically decaying tau lepton. Physics Letters B, Elsevier, 2012, 717, pp.89-108. ⟨10.1016/j.physletb.2012.09.032⟩. ⟨in2p3-00695821⟩

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