| Resumen |
We investigate the decay Bs0→J/ψK+K- for invariant masses of the K+K- pair in the range 1.35<M(K+K-)<2 GeV. The data sample corresponds to an integrated luminosity of 10.4 fb-1 of pp¯ collisions at s=1.96 TeV accumulated with the D0 detector at the Fermilab Tevatron collider. From the study of the invariant mass and spin of the K+K- system, we find evidence for the two-body decay Bs0→J/ψf2′(1525) and measure the relative branching fraction of the decays Bs0→J/ψf2′(1525) and Bs0→J/ψϕ to be Rf2′/ϕ=0.19±0.05(stat)±0.04(syst). |
