Search for charmonium and charmoniumlike states inΥ(2S)radiative decays
Search for charmonium and charmoniumlike states inΥ(2S)radiative decays
Using a sample of 158 million \Upsilon(2S) events collected with the Belle detector, charmonium and charmonium-like states with even charge parity are searched for in \Upsilon(2S) radiative decays. No significant \chi_{cJ} or \eta_c signal is observed and the following upper limits at 90% confidence level (C.L.) are obtained: BR(\Upsilon(2S)\to \gamma …