Observation ofB+→ψ(2S)K+andB0→ψ(2S)K*(892)0decays and measurements ofB-meson branching fractions intoJ/ψandψ(2S)final states

We report the observations of the decays $B^{+}\to \psi {\mathrm{}\left(2S\right)K}^{+}$ and $B^0\to \psi {\mathrm{}\left(2S\right)K}^{*}{\mathrm{}\left(892\right)\mathrm{}}^0$ in $p\overline{p}$ collisions at a center-of-mass energy of 1.8 TeV using a $110{\mathrm{pb}}^{\mathrm{-}1}$ data sample recorded by the Collider Detector at Fermilab. We also reconstruct the decays $B^{+}\to J/\psi K^{+}$ and $B^0\to J/\psi K^{*}{\mathrm{}\left(892\right)\mathrm{}}^0$ and measure the six ratios of branching fractions of these four decays. The relative branching-fraction results are shown to be consistent with phenomenological factorization calculations of hadronic $B$-meson decays. We use the world-average branching fraction $\mathcal{B}{(B}^{+}\to J/\psi K^{+})$ to derive $\mathcal{B}(B^{+}\to \psi {\mathrm{}\left(2S\right)K}^{+})=(0.56\mathrm{}\pm 0.08\pm 0.10)\times {10}^{-3},$ $\mathcal{B}(B^0\to \psi {\mathrm{}\left(2S\right)K}^{*}{\mathrm{}\left(892\right)\mathrm{}}^0)=(0.92\mathrm{}\pm 0.20\pm 0.16)\times {10}^{-3},$ and $\mathcal{B}(B^0\to J/\psi K^{*}{\mathrm{}\left(892\right)\mathrm{}}^0)=(1.78\mathrm{}\pm 0.14\pm 0.29)\times {10}^{-3},$ where the first and second uncertainties are statistical and systematic, respectively.