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Search for exclusive Z-boson production and observation of high-mass pp̄→pγγp̄→pl+l-p̄ events in pp̄ collisions at s=1.96TeV

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

91 Scopus citations

Abstract

This Letter presents a search for exclusive Z boson production in proton-antiproton collisions at s=1.96TeV, using the CDFII detector. No exclusive Z→l+l- candidates are observed and the first upper limit on the exclusive Z cross section in hadron collisions is found to be σexcl(Z)<0.96pb at 95% confidence level. In addition, eight candidate exclusive dilepton events from the process pp̄→pγγp̄ →pl+l-p̄ are observed, and a measurement of the cross section for Mll>40GeV/c2 and |ηl|<4 is found to be σ=0.24-0.10+0.13pb, which is consistent with the standard model prediction.

Original languageEnglish
Article number222002
JournalPhysical Review Letters
Volume102
Issue number22
DOIs
StatePublished - 4 Jun 2009

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