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


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Aaij R., Adeva B., Adinolfi M., Affolder A., Ajaltouni Z., Albrecht J., ...More

Journal of High Energy Physics, vol.2014, no.4, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2014 Issue: 4
  • Publication Date: 2014
  • Doi Number: 10.1007/jhep04(2014)091
  • Journal Name: Journal of High Energy Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Hadron-Hadron Scattering, Heavy quark production, Forward physics, Particle and resonance production
  • Open Archive Collection: AVESIS Open Access Collection
  • Manisa Celal Bayar University Affiliated: Yes

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 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 σZ → μ+μ−,D0 = 2.50 ± 1.12 ± 0.22 pb, σZ → μ+μ−,D+ = 0.44 ± 0.23 ± 0.03 pb, where the first uncertainty is statistical and the second systematic.