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Search for single production of scalar leptoquarks in p over(p, ̄) collisions decaying into muons and quarks with the D0 detector

  • 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

6 Scopus citations

Abstract

We report on a search for second generation leptoquarks (LQ2) which decay into a muon plus quark in p over(p, ̄) collisions at a center-of-mass energy of sqrt(s) = 1.96   TeV in the D0 detector using an integrated luminosity of about 300 pb-1. No evidence for a leptoquark signal is observed and an upper bound on the product of the cross section for single leptoquark production times branching fraction β into a quark and a muon was determined for second generation scalar leptoquarks as a function of the leptoquark mass. This result has been combined with a previously published D0 search for leptoquark pair production to obtain leptoquark mass limits as a function of the leptoquark-muon-quark coupling, λ. Assuming λ = 1, lower limits on the mass of a second generation scalar leptoquark coupling to a u quark and a muon are mLQ2 > 274   GeV and mLQ2 > 226   GeV for β = 1 and β = 1 / 2, respectively.

Original languageEnglish
Pages (from-to)74-81
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume647
Issue number2-3
DOIs
StatePublished - Apr 5 2007

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