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research article
First observation of the decay B-c(+) -> J/psi K+
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.
Type
research article
Web of Science ID
WOS:000325229300005
Authors
Aaij, R.
•
Beteta, C. Abellan
•
Adeva, B.
•
Adinolfi, M.
•
Adrover, C.
•
Affolder, A.
•
Ajaltouni, Z.
•
Albrecht, J.
•
Alessio, F.
•
Alexander, M.
Publication date
2013
Publisher
Published in
Volume
9
Start page
075
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
December 9, 2013
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