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Search for resonant production of tt̄ decaying to jets in pp̄ collisions at √s=1.96TeV

  • T. Aaltonen
  • , B. Alvarez González
  • , S. Amerio
  • , D. Amidei
  • , A. Anastassov
  • , A. Annovi
  • , J. Antos
  • , G. Apollinari
  • , J. A. Appel
  • , A. Apresyan
  • , T. Arisawa
  • , A. Artikov
  • , J. Asaadi
  • , W. Ashmanskas
  • , B. Auerbach
  • , A. Aurisano
  • , F. Azfar
  • , W. Badgett
  • , A. Barbaro-Galtieri
  • , V. E. Barnes
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Yun, A. Zanetti, Y. Zeng, S. Zucchelli
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Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

This paper reports a search for nonstandard model topquark resonances, Z, decaying to tt̄→W+bW -b̄, where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of pp̄ collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8fb-1. No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model in which the Z has a width of Γ Z′=0.012MZ′. Within this model, we exclude a Z boson with masses below 805GeV/c2 at the 95% confidence level.

Original languageEnglish
Article number072003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Issue number7
DOIs
StatePublished - 11 Oct 2011

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