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.

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

VELTRI, MICHELE;
2014

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 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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11576/2639095
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 21
  • ???jsp.display-item.citation.isi??? 79
social impact