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

LHCb collaboration

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Abstract

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 besigma<INF>Z ->mu<SUP>+</SUP>mu<SUP>-</SUP>,D<SUP>0</SUP></INF> = 2.50 +/- 1.12 +/- 0.22 pbsigma<INF>Z ->mu<SUP>+</SUP>mu<SUP>-</SUP>,D<SUP>+</SUP></INF> = 0.44 +/- 0.23 +/- 0.03 pb,where the first uncertainty is statistical and the second systematic.
Original languageEnglish
Article number91
Number of pages17
JournalJournal of High Energy Physics
Issue number4
DOIs
Publication statusPublished - 14 Apr 2014
Externally publishedYes

Keywords

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

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