Observation of the decay $B_c\to J/\psi K^{+}{K}^{-}{\pi }^{+}$

Abstract

The decay $B_c\to J/\psi K^{+}{K}^{-}{\pi }^{+}$ is observed for the first time, using proton-proton collisions collected with the LHCb detector corresponding to an integrated luminosity of 3fb${}^{-1}$. A signal yield of $78\pm 14$ decays is reported with a significance of 6.2 standard deviations. The ratio of the branching fraction of $\B_c \rightarrow J/ψK^+ K^- π^+$ decays to that of $B_c\to J/\psi {\pi }^{+}$ decays is measured to be $0.53\pm 0.10\pm 0.05$, where the first uncertainty is statistical and the second is systematic.

18 pages, 2 figures

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• BC_NPI module for the analysis of Bc -> J/psi +n pi and Bc -> B_s +n pi decays within the EvtGen package

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