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 1.0fb−‘ 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 D0 meson and four candidate events for a Z boson with a D+ meson are observed with a combined significance of 5.1standard deviations. The production cross-sections in the forward region are measured to be σZ→μ+μ−,D0=2.50±1.12±0.22pb σZ→μ+μ−,D+=0.44±0.23±0.03pb, where the first uncertainty is statistical and the second systematic.
|Titolo:||Observation of associated production of a Z boson with a D meson in the forward region|
|Data di pubblicazione:||2014|
|Appare nelle tipologie:||1.1 Articolo su Rivista|