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Search for t over(t, ̄) resonances in the lepton plus jets final state in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV

  • V. M. Abazov
  • , B. Abbott
  • , M. Abolins
  • , B. S. Acharya
  • , M. Adams
  • , T. Adams
  • , E. Aguilo
  • , S. H. Ahn
  • , M. Ahsan
  • , G. D. Alexeev
  • , G. Alkhazov
  • , A. Alton
  • , G. Alverson
  • , G. A. Alves
  • , M. Anastasoaie
  • , L. S. Ancu
  • , T. Andeen
  • , S. Anderson
  • , B. Andrieu
  • , M. S. Anzelc
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Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

We present a search for a narrow-width heavy resonance decaying into top quark pairs (X → t over(t, ̄)) in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV using approximately 0.9 fb-1 of data collected with the DØ detector at the Fermilab Tevatron Collider. This analysis considers t over(t, ̄) candidate events in the lepton plus jets channel with at least one identified b jet and uses the t over(t, ̄) invariant mass distribution to search for evidence of resonant production. We find no evidence for a narrow resonance X decaying to t over(t, ̄). Therefore, we set upper limits on σX ṡ B (X → t over(t, ̄)) for different hypothesized resonance masses using a Bayesian approach. For a Topcolor-assisted technicolor model, the existence of a leptophobic Z boson with mass MZ < 700 GeV and width ΓZ = 0.012 MZ can be excluded at the 95% C.L.

Original languageEnglish
Pages (from-to)98-104
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume668
Issue number2
DOIs
StatePublished - Oct 2 2008

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