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Scientific article
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English

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

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 707, no. 5, p. 459-477
Publication date2012
Abstract

A measurement of the production cross section of top quark pairs (tt) 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 tt production cross section σtt=177±20(stat.)±14(syst.)±7(lum.) pb is measured for an assumed top quark mass of mt=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.

Keywords
  • Top physics
  • Heavy quark production
  • Total cross section
Citation (ISO format)
ATLAS Collaboration. Measurement of the top quark pair production cross section in <em>pp</em> collisions at √s=7 TeV in dilepton final states with ATLAS. In: Physics letters. B, 2012, vol. 707, n° 5, p. 459–477. doi: 10.1016/j.physletb.2011.12.055
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Article (Published version)
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ISSN of the journal0370-2693
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