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Search for ZZ and Zγ* production in pp̄ collisions at s=1.96TeV and limits on anomalous ZZZ and ZZγ* couplings

  • 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

45 Scopus citations

Abstract

We present a study of μμμμ, eeee, and μμee events using 1fb-1 of data collected with the D0 detector at the Fermilab Tevatron pp̄ Collider at s=1.96TeV. Requiring the lepton pair masses to be greater than 30 GeV, we observe one event, consistent with the expected background of 0.13±0.03 events and with the predicted standard model ZZ and Zγ* production of 1.71±0.15 events. We set an upper limit on the ZZ and Zγ* cross section of 4.4 pb at the 95% C.L. We also derive limits on anomalous neutral trilinear ZZZ and ZZγ* gauge couplings. The one-parameter 95% C.L. coupling limits with a form-factor scale Λ=1.2TeV are -0.28<f40Z<0.28, -0.31<f50Z<0.29, -0.26<f40γ<0.26, and -0.30<f50γ<0.28.

Original languageEnglish
Article number131801
JournalPhysical Review Letters
Volume100
Issue number13
DOIs
StatePublished - 2 Apr 2008

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