Measurement of the tt¯ production cross section in pp¯ collisions using dilepton events

V. M. Abazov et al. (D0 Collaboration)
Phys. Rev. D 76, 052006 – Published 28 September 2007

Abstract

We present a measurement of the tt¯ pair production cross section in pp¯ collisions at s=1.96TeV utilizing approximately 425pb1 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 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.

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  • Received 4 June 2007

DOI:https://doi.org/10.1103/PhysRevD.76.052006

©2007 American Physical Society

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Vol. 76, Iss. 5 — 1 September 2007

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