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Top quark search with the D0 1992-1993 data sample

  • DO Collaboration
  • Fermi National Accelerator Laboratory
  • Purdue University
  • Michigan State University
  • Tata Institute of Fundamental Research
  • Columbia University
  • Rice University
  • University of Illinois at Chicago
  • Lawrence Berkeley National Laboratory
  • Commissariat à l’énergie atomique et aux énergies alternatives
  • Indiana University Bloomington
  • Centro Brasileiro de Pesquisas Físicas
  • Northeastern University
  • University of Michigan, Ann Arbor
  • Iowa State University
  • Brookhaven National Laboratory
  • Stony Brook University
  • Northwestern University
  • University of Maryland, College Park
  • University of Notre Dame
  • University of Hawai'i at Mānoa
  • Brown University
  • University of California at Riverside
  • Panjab University
  • Institute for High Energy Physics
  • University of Delhi
  • Florida State University
  • University of California at Davis
  • University of Rochester

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

We present results on the search for the top quark in pp̄ collisions at s =1.8 TeV with an integrated luminosity of 13.5±1.6 pb-1. We have considered tt̄ production in the standard model using electron and muon dilepton decay channels (tt̄→eμ+jets, ee+jets, and μμ+jets) and single-lepton decay channels (tt̄→e+jets and μ+jets) with and without tagging of b quark jets. An analysis of these data optimized for top quark masses below 140 GeV/c2 gives a lower top quark mass limit of 128 GeV/c2. An analysis optimized for higher top quark masses yields 9 events with an expected background of 3.8±0.9. If we assume that the excess is due to tt̄ production, and assuming a top quark mass of 180 GeV/c2, we obtain a cross section of 8.2±5.1 pb.

Original languageEnglish
Pages (from-to)4877-4919
Number of pages43
JournalPhysical Review D
Volume52
Issue number9
DOIs
StatePublished - 1995

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