Evidence for ${\eta }_c$(2S)$\to\pipieta$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +567

The decay $η_c(2S)\to\pipieta$ is searched for through the radiative transition $\psi (3686)\to \gamma {\eta }_c(2S)$ using 448 million $\psi$(3686) events accumulated at the BESIII detector. The fir…