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Measurement of the ratio of the p over(p, ̄) → W + c-jet cross section to the inclusive p over(p, ̄) → W + jets cross section

  • 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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Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

We present a measurement of the fraction of inclusive W + jets events produced with net charm quantum number ±1, denoted W + c-jet, in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV using approximately 1 fb-1 of data collected by the DØ detector at the Fermilab Tevatron Collider. We identify the W + jets events via the leptonic W boson decays. Candidate W + c-jet events are selected by requiring a jet containing a muon in association with a reconstructed W boson and exploiting the charge correlation between this muon and W boson decay lepton to perform a nearly model-independent background subtraction. We measure the fraction of W + c-jet events in the inclusive W + jets sample for jet pT > 20 GeV and pseudorapidity | η | < 2.5 to be 0.074 ± 0.019 (stat .) ±0.014 0.012 (syst .), in agreement with theoretical predictions. The probability that background fluctuations could produce the observed fraction of W + c-jet events is estimated to be 2.5 × 10-4, which corresponds to a 3.5σ statistical significance.

langue originaleAnglais
Pages (de - à)23-30
Nombre de pages8
journalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume666
Numéro de publication1
Les DOIs
étatPublié - 7 août 2008
Modification externeOui

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