First observation of the decay B[subscript c][superscript +] to J/ψK[superscript +].
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The decay B[superscript +][subscript c]→J/ψK[superscript +] is observed for the first time using a data sample, corresponding to an integrated luminosity of 1.0 fb[superscript −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[superscript +][subscript c]→J/ψK[superscript +] to that of B[superscript +][subscript c]→J/ψπ[superscript +] is measured to be 0.069 ± 0.019 ± 0.005, where the first uncertainty is statistical and the second is systematic.
DepartmentMassachusetts Institute of Technology. Department of Physics
Journal of High Energy Physics
Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. “First Observation of the Decay B[subscript c][superscript +] to J/ψK[superscript +].” Journal of High Energy Physics 2013, no. 9 (September 2013). © 2013 Cern for the benefit of the LHCb collaboration
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