Garrido Beltrán, LluísGascón Fora, DavidGraciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséLHCb Collaboration2019-01-282019-01-282016-09-271126-6708https://hdl.handle.net/2445/127644The ratio of branching fractions RK/π≡B(B+c→J/ψK+)/B(B+c→J/ψπ+) is measured with pp collision data collected by the LHCb experiment at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. It is found to be R K/π = 0.079 ± 0.007 ± 0.003, where the first uncertainty is statistical and the second is systematic. This measurement is consistent with the previous LHCb result, while the uncertainties are significantly reduced.15 p.application/pdfengcc-by (c) Garrido Beltrán, Lluís et al., 2016http://creativecommons.org/licenses/by/3.0/esInteraccions d'hadronsProcessos de ramificacióHadron interactionsBranching processesinfo:eu-repo/semantics/article6697732019-01-28info:eu-repo/semantics/openAccess