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Search for technicolor particles produced in association with a W boson at CDF

  • T. Aaltonen
  • , J. Adelman
  • , B. Álvarez González
  • , S. Amerio
  • , D. Amidei
  • , A. Anastassov
  • , A. Annovi
  • , J. Antos
  • , G. Apollinari
  • , A. Apresyan
  • , T. Arisawa
  • , A. Artikov
  • , J. Asaadi
  • , W. Ashmanskas
  • , A. Attal
  • , A. Aurisano
  • , F. Azfar
  • , W. Badgett
  • , A. Barbaro-Galtieri
  • , V. E. Barnes
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Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We present a search for the technicolor particles ρT and πT in the process pp̄→ρT→WπT at a center of mass energy of √s=1.96TeV. The search uses a data sample corresponding to approximately 1.9fb-1 of integrated luminosity accumulated by the CDF II detector at the Fermilab Tevatron. The event signature we consider is W→ ν and πT→bb̄, bc̄ or bū depending on the πT charge. We select events with a single high-pT electron or muon, large missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with multiple b-tagging algorithms. The observed number of events and the invariant mass distributions are consistent with the standard model background expectations, and we exclude a region at 95% confidence level in the ρT-πT mass plane. As a result, a large fraction of the region m(ρT)=180-250GeV/c2 and m(πT)=95-145GeV/c2 is excluded.

Original languageEnglish
Article number111802
JournalPhysical Review Letters
Volume104
Issue number11
DOIs
StatePublished - 19 Mar 2010

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