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Observation of associated production of a Z boson with a D meson in the forward region

Research output: Contribution to journalArticle

  • R. Aaij
  • B. Adeva
  • M. Adinolfi
  • A. Affolder
  • Z. Ajaltouni
  • J. Albrecht
  • F. Alessio
  • M. Alexander
  • S. Ali
  • G. Alkhazov
  • P. Alvarez Cartelle
  • A. A. Alves
  • S. Amato
  • S. Amerio
  • Y. Amhis
  • L. Anderlini
  • J. Anderson
  • R. Andreassen
  • M. Andreotti
  • J. E. Andrews
  • R. B. Appleby
  • O. Aquines Gutierrez
  • F. Archilli
  • A. Artamonov
  • M. Artuso
  • E. Aslanides
  • G. Auriemma
  • M. Baalouch
  • S. Bachmann
  • J. J. Back
  • A. Badalov
  • V. Balagura
  • W. Baldini
  • R. J. Barlow
  • C. Barschel
  • S. Barsuk
  • W. Barter
  • V. Batozskaya
  • Th. Bauer
  • A. Bay
  • J. Beddow
  • F. Bedeschi
  • Laurence Carson
  • P. E. L. Clarke
  • G. A. Cowan
  • Daniel Craik
  • S. Eisenhardt
  • F. Muheim
  • M. Needham
  • S. Playfer
  • LHCb collab

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Original languageEnglish
Article number91
Number of pages17
JournalJournal of High Energy Physics
Issue number4
Publication statusPublished - 14 Apr 2014


A search for associated production of a Z boson with an open charm meson is presented using a data sample, corresponding to an integrated luminosity of 1.0 fb(-1) of proton-proton collisions at a centre-of-mass energy of 7 TeV, collected by the LHCb experiment. Seven candidate events for associated production of a Z boson with a D-0 meson and four candidate events for a Z boson with a D+ meson are observed with a combined significance of 5.1 standard deviations. The production cross-sections in the forward region are measured to be

sigmaZ ->mu+mu-,D0 = 2.50 +/- 1.12 +/- 0.22 pb

sigmaZ ->mu+mu-,D+ = 0.44 +/- 0.23 +/- 0.03 pb,

where the first uncertainty is statistical and the second systematic.

    Research areas

  • Hadron-Hadron Scattering, Heavy quark production, Forward physics, Particle and resonance production, DOUBLE-PARTON SCATTERING, PAIR PRODUCTION, PP COLLISIONS, LHC, TEV, DISTRIBUTIONS

ID: 21255642