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Measurement of the cross section for top-quark pair production in pp collisions at s√=7TeV with the ATLAS detector using final states with two high-p T leptons

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Article number59
<mark>Journal publication date</mark>05/2012
<mark>Journal</mark>Journal of High Energy Physics
Issue number5
Volume2012
Number of pages35
Publication statusPublished
Original languageEnglish

Abstract

A measurement is reported of the production cross section of top-quark pairs (t t¯ ) in proton-proton collisions at a center-of-mass energy of 7 TeV recorded with the ATLAS detector at the LHC. Candidate events have a signature consistent with containing two isolated leptons, large missing transverse momentum, and at least two jets. Using a data sample corresponding to an integrated luminosity of 0.70 fb−1, a t t¯ production cross section σtt¯=176±5(stat.)+14−11(syst.)±8(lum.) pb is measured for an assumed top-quark mass of m t  = 172.5 GeV. This measurement is in good agreement with Standard Model predictions.

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This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.