Recent $J/\psi$ Results from BESII

Abstract

The studies on the multi-quark candidates, light scalar mesons and excited baryon states at BES are presented, based on $5.8\times 10^7$ $J/\psi$ data collected with BESII detector. The measurements of some $J/\psi$ and ${\eta }_c$ decays are presented too. We also report the searches for the lepton flavor violation and pentaquark states in $J/\psi$ decays.

Talk given at 10th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2004), Beijing, China, 29 Aug - 4 Sept. 2004, 6 pages, 8 figures, to be published in Int. J. Mod. Phys

References in corpus (7)

• Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
• Search for the Pentaquark State in $\psi (2S)$ and $J/\psi$ Decays to $K_S^{0}p{K}^{-}\bar{n}$ and $K_S^0\bar{p}{K}^{+}n$
• Partial Wave Analyses of $J/\psi \to \gamma K^{+}{K}^{-}$ and $\gamma K_S^0{K}_S^0$
• Observation of a threshold enhancement in the p \bar{Lambda} invariant mass spectrum
• Measurement of the Branching Fraction of J/psi --> pi+ pi- pi0
• Improved measurement of the branching ratio of J/psi-->K_S K_L
• Measurements of J/psi --> p \bar{p}

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• Towards the decays of ${\bar{N}}_X(1625)$ in the molecular picture