Measurement of relative branching fractions of B decays to $\psi (2S)$ and $J/\psi$ mesons

Abstract

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 $\frac{\mathcal{B}(B^{+}\to \psi (2S)K^{+})}{\mathcal{B}(B^{+}\to J/\psi K^{+})}=0.594\pm 0.006(stat)\pm 0.016(syst)\pm 0.015(R_{\psi })$, $\frac{\mathcal{B}(B^0\to \psi (2S)K^{\ast 0})}{\mathcal{B}(B^0\to J/\psi K^{\ast 0})}=0.476\pm 0.014(stat)\pm 0.010(syst)\pm 0.012(R_{\psi })$, $\frac{{\mathcal{B}}_s^0(B_s^0\to \psi (2S)\varphi )}{\mathcal{B}(B_s^0\to J/\psi \varphi )}=0.489\pm 0.026(stat)\pm 0.021(syst)\pm 0.012(R_{\psi })$ where the third uncertainty is from the ratio of the $\psi (2S)$ and $J/\psi$ branching fractions to $\mu \mu$.

14 pages, 1 figure

References in corpus (2)

• PYTHIA 6.4 Physics and Manual
• Relative rates of B meson decays into psi(2S) and J/psi mesons

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