Search for charmonium and charmonium-like states in ${\rm Y}(1S)$ and ${\rm Y}(2S)$ radiative decays

C. P. Shen

Using samples of 102 million ${\rm Y}(1S)$ and 158 million ${\rm Y}(2S)$ event samples collected with the Belle detector, we report on the first search for charge-parity-even charmonium and ch…