First observation of the decay Bc+to → J/ψ K+

The LHCb Collaboration

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Abstract

The decay Bc+to → 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 Bc+to → J/ψ K+ to that of Bc+to → J/ψ K+ is measured to be 0.069 ± 0.019 ± 0.005, where the first uncertainty is statistical and the second is systematic.

Original languageEnglish
Article number75
Number of pages14
JournalJournal of High Energy Physics
Volume2013
Issue number9
DOIs
Publication statusPublished - 13 Sep 2013
Externally publishedYes

Keywords

  • B physics
  • Branching fraction
  • Hadron-Hadron Scattering

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