Hadronic decays of charmonia from BESII

Abstract

Recent results on charmonia decays at BESII/BEPC are reported, including the observation of psi'-->K_S K_L, psi'--> Vector + Tensor and psi'--> Vector + Pseudoscalar for the measurement of the relative phase between the strong and electromagnetic decays of psi' and a test of the pQCD ``12% rule'' between psi' and J/psi decays; the test of the color-octet mechanism via chi_cJ --> p \bar{p} and chi_cJ-->Λ\barΛ; the first observation of chi_c0--> f_0(980)f_0(980); and a study of the psi' and chi_cJ decays with K_S K_S in the final states.

Invited talk in MESON 2004

References in corpus (12)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Measurements of $\psi (2S)$ decays into Vector- Tensor final states
• First observation of psi(2S)-->K_S K_L
• Improved measurement of the branching ratio of J/psi-->K_S K_L
• Possible large phase in psi(2S) -> 1-0- Decays
• The interference between virtual photon and 1-- charmonium in e+e-experiment
• Relative phase between strong and electromagnetic amplitudes in psi(2S) to 0- 0- decays
• Psi(2S) two- and three-body hadronic decays
• First Evidence of Lambda Lambda-bar in χ_cJ Decays
• Signal Significance in the Presence of Systematic and Statistical Uncertainties
• Search for K_S K_S in J/psi and psi(2S) decays
• Determination of BR(chi_{cJ} --> p \bar{p}) in psi(2S) decays