The decay B-c(+) -> J/psi 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 p p 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/psi K+ to that of B-c(+) -> J/psi pi(+) is measured to be 0.069 +/- 0.019 +/- 0 : 005, where the first uncertainty is statistical and the second is systematic.
Titolo: | First observation of the decay B-c(+) -> J/psi K+ | |
Autori: | ||
Data di pubblicazione: | 2013 | |
Rivista: | ||
Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/JHEP09(2013)075 | |
Handle: | http://hdl.handle.net/11384/38830 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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