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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
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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2012 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 707, no 5, 459-477 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2012. Vol. 707, no 5, 459-477 p.
Keyword [en]
Top physics, Heavy quark production, Total cross section
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-171918DOI: 10.1016/j.physletb.2011.12.055ISI: 000300211000004OAI: oai:DiVA.org:uu-171918DiVA: diva2:512831
Note
With 3027 more authors from the ATLAS Collaboration.Available from: 2012-03-29 Created: 2012-03-29 Last updated: 2017-12-07Bibliographically approved

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Brenner, RichardBuszello, Claus P.Ekelöf, TordEllert, MattiasFerrari, Arnaud

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