Experimental Study ofJ/ψRadiative Decay toπ0π0

The decay $J/\psi \to \gamma {\pi }^0{\pi }^0$ is studied with $7.0\times {10}^{6}J/\psi$ events collected in the neutral trigger mode by the Beijing Spectrometer at the Beijing Electron-Positron Collider. Evidence for the existence of $f_J\left(1710\right)$ and $\xi \left(2230\right)$ in this channel is presented, and the corresponding masses as well as the product branching ratios are obtained. An interpretation of the $\xi \left(2230\right)$ as a glueball is favored.