Observation of the charmonium decay $\hat{I}{\cdot }_c\to {\hat{I}}^3{\hat{I}}^3$ in $J/\ddot{I}ˆ\to {\hat{I}}^3\hat{I}{\cdot }_c$

BESIII Collaboration, M. Ablikim, M. N. Achasov +662

Using $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector at the BEPCII collider, the decay $\hat{I}{\cdot }_c\to {\hat{I}}^3{\hat{I}}^3$ in $J/\ddot{I}ˆ\to {\hat{I}}^3\hat{I}{\cdot }_c$ is observed. We determin…