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Observation of the decay Bc+→ψ(2S)π+

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The decay Bc+→ψ(2S)π+ with ψ(2S) →μ+μ- is observed with a significance of 5.2σ using pp collision data corresponding to an integrated luminosity of 1.0 fb-1 collected by the LHCb experiment. The branching fraction of Bc+→ψ(2S)π+ decays relative to that of the Bc+→J/ψπ+ mode is measured to be B(Bc+→ψ(2S) π+)B(Bc+→J/ψπ+)=0.250±0.068(stat) ±0.014(syst)±0.006(B). The last term is the uncertainty on the ratio B(ψ(2S)→μ+μ-)/B(J/ ψ→μ+μ-). © 2013 CERN.




Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., … Zvyagin, A. (2013). Observation of the decay Bc+→ψ(2S)π+. Physical Review D - Particles, Fields, Gravitation and Cosmology, 87(7).

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