LHCb CollaborationAdeva Andany, BernardoÁlvarez Cartelle, PaulaDosil Suárez, ÁlvaroFernández Albor, Víctor ManuelGallas Torreira, Abraham AntonioHernando Morata, José ÁngelPazos Álvarez, AntonioPérez Trigo, EliseoPlo Casasus, MáximoRodríguez Pérez, PabloRomero Vidal, AntonioSaborido Silva, Juan JoséSanmartín Sedes, BraisSantamarina Ríos, CibránSeco Miguélez, Marcos AntonioVázquez Regueiro, PabloVázquez Sierra, Carlos2020-04-222020-04-222014Aaij, 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)091http://hdl.handle.net/10347/21641A 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.eng© 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 madehttps://creativecommons.org/licenses/by/4.0Hadron-hadron scatteringHeavy quark productionForward physicsParticle and resonance productionjournal article10.1007/JHEP04(2014)0911029-8479open access