Observation of the decay B̄s0→ψ(2S)K+π−
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Article history: Received 24 March 2015 Received in revised form 12 June 2015 Accepted 16 June 2015 Available online 17 June 2015 Editor: M. Doser The decay Bs → ψ(2S)K+π− is observed using a data set corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B0 →ψ(2S)K+π− decay mode is measured to be B(Bs →ψ(2S)K+π−) B(B0 →ψ(2S)K+π−) = 5.38± 0.36 (stat)± 0.22 (syst)± 0.31 ( f s/ fd)%,
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