Recent Results from BES

Abstract

We report partial wave analysis results for $J/\psi \to \gamma K^{+}{K}^{-}$ based on $7.8\times 10^6$ BESI $J/\psi$ events, and find $0^{++}$ to be dominant in the $f_J(1710)$ mass region. Some very preliminary results are presented from the $2.2\times 10^7$ $J/\psi$ events newly collected at the upgraded BES(BESII). Using the world largest $\psi (2S)$ data sample, BES measures branching ratios of $\psi (2S)$ radiative and hadronic decays. The preliminary R values measured by BESII in the 2-5 GeV energy region are also presented.

11 pages, 11 figures, proceeding paper for IV International Conference on Hyperons, Charm and Beauty Hadrons, June of 2000, Valencia, Spain

References in corpus (1)

• Measurement of the Total Cross Section for Hadronic Production by e+e- Annihilation at Energies between 2.6-5 Gev