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

G. Aad, Mogens Dam, Nele Maria Philomena Boelaert, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Simon Johann Franz Heisterkamp, Morten Dam Jørgensen, Sascha Mehlhase, Esben Bryndt Klinkby, Björn Stefan Nilsson, Troels Christian Petersen, Ask Emil Løvschall-Jensen, Stefania Xella

49 Citations (Scopus)

Abstract

A measurement is reported of the production cross section of top-quark pairs (tt̄) 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 tt̄ production cross section σtt̄ = 176 ± 5(stat.)-11 11+(syst.) ± 8(lum.) pb is measured for an assumed top-quark mass of mt = 172.5 GeV. This measurement is in good agreement with Standard Model predictions.

Original languageEnglish
JournalJournal of High Energy Physics (Online)
Volume2012
Issue number5
Pages (from-to)059
ISSN1126-6708
DOIs
Publication statusPublished - 23 May 2012

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