Study of the P-wave charmonium state χ_{cJ} in ψ(2S) decays

J. Z. Bai

The processes $\psi (2S)\to \gamma {\pi }^{+}{\pi }^{-}$, $\gamma K^{+}{K}^{-}$ and $\gamma p\bar{p}$ have been studied using a sample of $3.7\times 10^6$ produced $\psi (2S)$ decays. We determine the total width of the $χ…