Bes Results on Charmonium Decays and Transitions

Results are reported based on samples of 58 million J/ψ and 14 million ψ(2S) decays obtained by the BESII experiment. Improved branching fraction measurements are determined, including branching fractions for J/ψ → π⁺π^-π⁰, ψ(2S) → π⁰ J/ψ, ηJ/ψ, π⁰π⁰J/ψ, anything J/ψ, and ψ(2S) → γχ_c1, γχ_c2 → γγJ/ψ. Using 14 million ψ(2S) events, f₀(980)f₀(980) production in χ_c0 decays and K^*(892)⁰ bar {K}^*(892)⁰ production in χ_cJ (J = 0,1,2) decays are observed for the first time, and branching ratios are determined.