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Measurement of the t(t)over-bar production cross section in p(p)over-bar collisions using dilepton events
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2007 (English)In: Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, Vol. 76, no 5, 052006- p.Article in journal (Refereed) Published
Abstract [en]

We present a measurement of the t (t) over bar pair production cross section in p (p) over bar collisions at root s=1.96 TeV utilizing approximately 425 pb(-1) of data collected with the D0 detector. We consider decay channels containing two high p(T) charged leptons (either e or mu) from leptonic decays of both top-daughter W bosons. These were gathered using four sets of selection criteria, three of which required that a pair of fully identified leptons (i.e., e mu, ee, or mu mu) be found. The fourth approach imposed less restrictive criteria on one of the lepton candidates and required that at least one hadronic jet in each event be tagged as containing a b quark. For a top quark mass of 175 GeV, the measured cross section is 7.4 +/- 1.4(stat)+/- 1.0(syst) pb and for the current Tevatron average top quark mass of 170.9 GeV, the resulting value of the cross section is 7.8 +/- 1.8(stat+syst) pb.

Place, publisher, year, edition, pages
2007. Vol. 76, no 5, 052006- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-142930DOI: 10.1103/PhysRevD.76.052006ISI: 000249786800013OAI: oai:DiVA.org:uu-142930DiVA: diva2:388582
Available from: 2011-01-18 Created: 2011-01-18 Last updated: 2011-01-18Bibliographically approved

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