The relative rates of B-meson decays into J/ψ
and ψ(2S) mesons are measured for the three decay modes
in pp collisions recorded with the LHCb detector. The ratios
of branching fractions (B) are measured to be
B(B+ → ψ(2S)K+)
B(B+ → J/ψK+)
= 0.594 ± 0.006(stat) ± 0.016(syst) ± 0.015(Rψ ),
B(B0 → ψ(2S)K∗0)
B(B0 → J/ψK∗0)
= 0.476 ± 0.014(stat) ± 0.010(syst) ± 0.012(Rψ ),
B(B0
s → ψ(2S)φ)
B(B0
s → J/ψφ)
= 0.489 ± 0.026(stat) ± 0.021(syst) ± 0.012(Rψ ),
where the third uncertainty is from the ratio of the ψ(2S)
and J/ψ branching fractions to μ+μ−.