# name
First observation of the decay B_c^+ to J/psi k+

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The decay B+ c → J/ψ K+ is observed for the first time using a data sample, corresponding to an integrated luminosity of 1.0 fb−1 , collected by the LHCb experiment in pp collisions at a centre-of-mass energy of 7 TeV. A yield of 46 ± 12 events is reported, with a significance of 5.0 standard deviations. The ratio of the branching fraction of B+ c → J/ψ K+ to that of B+ c → J/ψ π+ is measured to be 0.069 ± 0.019 ± 0.005, where the first uncertainty is statistical and the second is systematic.

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Journal of High Energy Physics, 2013, vol. 9, num. 75

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cc by (c) Garrido Beltrán, Lluís et al., 2013

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
First observation of the decay B_c^+ to J/psi k+