Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW D 79, 111102(R) (2009). Copyright © 2009 The American Physical Society. Used by permission.


We report on a study of the relative rates of B meson decays into ψ(2S) and J/ψ mesons using 1.3 fb-1 of pp collisions at √s = 1.96 TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider. We observe the channels B0s → ψ(2S)φ, B0sJ/ψφ, B± → ψ(2S)K±, and B± → i>J/ψK± and we measure the relative branching fractions for these channels to be (B(Bs0 → ψ(2S)φ))/(B(Bs0J/ψφ)) = 0.53 ± 0.10 (stat) ± 0.07 (syst) ± 0.06 (B), (B(B± → ψ(2S)K±))/(B(B±JK±) = 0.63 ± 0.05(stat) ± 0.03(syst) ± 0.07 (B), where the final error corresponds to the uncertainty in the J/ψ and ψ(2S) branching ratio into two muons.

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