The relative rates of B-meson decays into J/ψ ; 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(R<inf>ψ</inf>), B(B0 → ψ(2S)K*0)/B(B0 → J/ψK*0) = 0.476 ± 0.014(stat) ± 0.010(syst) ± 0.012(R<inf>ψ</inf>), B(B0<inf>s</inf> →ψ(2S)φ)/B(B0<inf>s</inf> →J/ψφ) = 0.489 ± 0.026(stat) ± 0.021(syst) ± 0.012(R<inf>ψ</inf>), where the third uncertainty is from the ratio of the ψ(2S) ; J/ψ branching fractions to μ+ μ−. © 2012, CERN, for the benefit of the LHCb collaboration.
Measurement of relative branching fractions of B decays to ψ (2S) ; J/ψ mesons
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2012-01-01
Abstract
The relative rates of B-meson decays into J/ψ ; 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(RI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


