Observation of associated production of a Z boson with a D meson in the forward region
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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 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 pbσZ→μ+μ−,D+=0.44±0.23±0.03 pb,
$
where the first uncertainty is statistical and the second systematic.
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Aaij, R., Adeva, B., Adinolfi, M. et al. Observation of associated production of a Z boson with a D meson in the forward region. J. High Energ. Phys. 2014, 91 (2014). https://doi.org/10.1007/JHEP04(2014)091
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https://doi.org/10.1007/JHEP04(2014)091Sponsors
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© CERN for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made