Search for $C=+$ charmonium and bottomonium states in $e^{+}{e}^{-}\to \gamma +X$ at B factories

Dan Li, Zhi-Guo He, Kuang-Ta Chao

We study the production of $C=+$ charmonium states $X$ in $e^{+}{e}^{-}\to \gamma +X$ at B factories with $X={\eta }_c(nS)$ (n=1,2,3), ${\chi }_{cJ}(mP)$ (m=1,2), and ${}^1{D}_2(1D)$. In the S and P wave cas…