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

The Lhcb Collaboration

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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 7TeV, collected by the LHCb experiment. Seven candidate events for associated production of a Z boson with a D0 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 αZμ+μ-, D0= 2.50 ±1.12 ±0.22 pb αZμ+μ-, D + = 0.44 ±0.23 ±0.03 pb,where the first uncertainty is statistical and the second systematic. [Figure not available: see fulltext.]

Original languageEnglish (US)
Article number91
JournalJournal of High Energy Physics
Issue number4
StatePublished - Apr 14 2014



  • Forward physics
  • Hadron-Hadron Scattering
  • Heavy quark production
  • Particle and resonance production

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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