Charmonium in China: BEPCII/BESIII

Abstract

Results based on 106 M ${\psi }^{\prime }$ events and about 226 M $J/\psi$ events acquired with the BESIII detector at BEPCII are reported, including a confirmation of the BESII $p\bar{p}$ threshold enhancement in $J/\psi \to \gamma p\bar{p}$, branching ratios for ${\chi }_{cJ}\to {\pi }^0{\pi }^0$ and $\eta \eta$, and first measurements of the branching ratios for ${\psi }^{\prime }\to {\pi }^0{h}_c$ and $h_c\to \gamma {\eta }_c$, as well as measurements of the mass and width of the $h_c$. Also reported are first observations of the two photon process ${\psi }^{\prime }\to \gamma \gamma J/\psi$ and $f_0(980)-a_0(980)$ mixing.

Plenary talk at Meson2010, Krakow, Poland, June 10 - 15, 2010; 5 pages, 4 figures

References in corpus (4)

• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• Measurements of h_c(^1P_1) in psi' Decays
• Observation of a ppb mass threshoud enhancement in ψ^\prime\toπ^+π^-J/ψ(J/ψ\toγp\bar{p}) decay
• Study a0(980)-f0(980) mixing from a0(980) -> f0(980) transition

Cited by in corpus (2)

• The discrete contribution to ${\psi }^{\prime }\to J/\psi +\gamma \gamma$
• Spectral-statistics properties of the experimental and theoretical light meson spectra