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Measurement of the top quark pair production cross section in pp collisions at root s=7 TeV in dilepton final states with ATLAS

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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  • The ATLAS collaboration
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<mark>Journal publication date</mark>7/02/2012
<mark>Journal</mark>Physics Letters B
Issue number5
Volume707
Number of pages19
Pages (from-to)459-477
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A measurement of the production cross section of top quark pairs (t (t) over bar) in proton-proton collisions at a center-of-mass energy of 7 TeV recorded with the ATLAS detector at the Large Hadron Collider is reported. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. Using a data sample corresponding to an integrated luminosity of 35 pb(-1), a t (t) over bar production cross section sigma(t (t) over bar) = 177 +/- 20(stat.) +/- 14(syst.) +/- 7(lum.) pb is measured for an assumed top quark mass of m(t) = 172.5 GeV. A second measurement requiring at least one jet identified as coming from a b quark yields a comparable result, demonstrating that the dilepton final states are consistent with being accompanied by b-quark jets. These measurements are in good agreement with Standard Model predictions

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This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.