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

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

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Aaij2014_Article_ObservationOfAssociatedProduct.pdf

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Date Issued

2014

Journal

Journal of High Energy Physics

Publisher

Springer Science and Business Media LLC

Citation

Aaij, R., et al. "Observation of Associated Production of a Z Boson with a D Meson in the Forward Region." 4 (2014): 091 (12 pp.).

Version

Final published version

Abstract

© CERN, for the benefit of the LHCb Collaboration. 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.

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Creative Commons Attribution 4.0 International license

https://creativecommons.org/licenses/by/4.0/

Persistent DSpace Link

https://hdl.handle.net/1721.1/136082

DOI of Published Version

10.1007/JHEP04(2014)091