Study of the decay Bₛ⁰ → J/ψf₂′(1525) in μ+ μ- K+K- final states

الأصل · EN

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 p p 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 and measure the relative branching fraction of the decays and to be Rf₂′/ϕ = 0.19 ± 0.05 (stat) ± 0.04 (syst).