1205.0918 (LHCb collaboration)

Measurement of relative branching fractions of B decays to $ψ(2S)$
and $J/ψ$ mesons    [PDF]

LHCb collaboration

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 $\mumu$.

View original: http://arxiv.org/abs/1205.0918