Phys. Rev. D 55, 1153–1158 (1997)Measurement of the branching ratios ψ′→e+e-, ψ′→J/ψππ, and ψ′→J/ψηReceived 3 September 1996; published in the issue dated 1 February 1997 We have observed exclusive decays of the ψ′ in an experiment where the ψ′ is formed in antiproton-proton annihilations. We report the branching ratios B(ψ′→e+e-)=(8.3±0.5stat±0.7syst)×10-3, B(ψ′→J/ψπ+π-)=0.283±0.021stat±0.020syst, B(ψ′→J/ψπ0π0)=0.184±0.019stat±0.013syst, B(ψ′→J/ψη)=0.032±0.010stat±0.002syst. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.55.1153
DOI:
10.1103/PhysRevD.55.1153
PACS:
13.75.Cs, 14.40.Gx
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