Measurement of the ttbar production cross section in ppbar collisions using dilepton events

Abstract

We present a measurement of the ttbar pair production cross section in ppbar collisions at sqrt(s) = 1.96 TeV utilizing approximately 425 pb-1 of data collected with the D0 detector. We consider decay channels containing two high pT charged leptons (either e or μ) 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., eμ, ee, or μμ) 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.

26 pages, 9 figures, submitted to Phys. Rev. D

References in corpus (4)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s) = 1.96 TeV
• Measurement of the ttbar production cross section in pbarp collisions at sqrt(s) = 1.96 TeV using secondary vertex b tagging

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• Search for the lightest scalar top quark in events with two leptons in ppbar collisions at sqrt(s)=1.96 TeV
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• Review of Top Quark Physics Results
• Standard Model backgrounds to supersymmetry searches
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• Review of Properties of the Top Quark from Measurements at the Tevatron
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• Precision measurements of the top quark mass from the Tevatron in the pre-LHC era
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• Ultraviolet Extension of a Model with Dynamical Electroweak Symmetry Breaking by Both Top-Quark and Technifermion Condensates
• Heavy-Flavor Production at Accelerators
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