The relative rates of B-meson decays into $J/\psi$ and $\psi(2S)$ mesons are measured for the three decay modes in pp collisions recorded with the LHCb detector. The ratios of branching fractions ($\mathcal{ B}$) are measured to be $\frac{ \mathcal{ B}(B^+ \to \psi(2S) K^+)}{ \mathcal{ B}(B^+ \to J/\psi K^+)} = 0.594 \pm 0.006 (stat) \pm 0.016 (syst) \pm 0.015 (R_{ \psi})$, $\frac{ \mathcal{ B}(B^0 \to \psi(2S) K^{ *0})}{ \mathcal{ B}(B^0 \to J/\psi K^{ *0})} = 0.476 \pm 0.014 (stat) \pm 0.010 (syst) \pm 0.012\,(R_{ \psi})$, $\frac{ \mathcal{ B}^{ 0}_{ s}(B^0_s \to \psi(2S)\phi)}{ \mathcal{ B}(B^0_s \to J/\psi\phi)} = 0.489 \pm 0.026 (stat) \pm 0.021 (syst) \pm 0.012\,(R_{ \psi})$ where the third uncertainty is from the ratio of the $\psi(2S)$ and $J/\psi$ branching fractions to $\mu\mu$.
Categories: hep-ex