Charmonium Review

Abstract

During the last few years there has been a renaissance in charm and charmonium spectroscopy with higher precision measurements at the ${\psi }^{{}^{\prime }}$ and $\psi (3770)$ coming from BESII and CLEOc and many new discoveries coming from B-factories. In this paper, I will review the status of $\psi (3770)$ and below.

4 pages, 3 figures, invited talk at BEACH, Lanccaster, England, July 2 to 8, 2006. Correct references

References in corpus (22)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Observation of Double cc bar Production in e+ e- Annihilation at sqrt{s} ~ 10.6 GeV
• Observation of the eta_c(2S) in exclusive B-->K KsK-pi+ decays
• Observation of eta_c^{prime} Production in gamma gamma Fusion at CLEO
• Measurements of the mass and width of the eta_c meson and of an eta_c(2S) candidate
• Observation of psi(3770)--> pi pi J/psi and Measurement of Gamma_{ee}[psi(2S)]
• Evidence of psi(3770) non-DD-bar Decay to J/psi pi+pi-
• Observation of the ^1P_1 State of Charmonium
• Decay of the psi(3770) to Light Hadrons
• Partial Wave Analysis of ${\chi }_{c0}\to {\pi }^{+}{\pi }^{-}{K}^{+}{K}^{-}$
• Observation of psi(3770) --> gamma chi_c0
• Photon Transitions in ψ(2S) Decays to χ_{cJ}(1P) and η_c(1S)
• Branching Fractions for psi(2S) to J/psi Transitions
• First Observation of psi(3770) --> gamma chi_{c1} --> gamma gamma J/psi
• Heavy Quarkonium
• A Measurement of Psi(2S) Resonance Parameters
• ψ(2S) Decays into $\J$ plus Two Photons
• Mixing of pseudoscalar mesons and isospin symmetry breaking
• Possible large branching fraction of psi(3770) decays to charmless final states
• Study of psi(2S) decays to X J/psi