Measurement of the branching fractions of $\ddot{I}{‡}_{cJ}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\ddot{I}{€}^0$ via $\ddot{I}ˆ(3686)\to {\hat{I}}^3\ddot{I}{‡}_{cJ}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +762

Using $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector operating at BEPCII, the branching fractions of $\ddot{I}{‡}_{cJ}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\ddot{I}{€}^0$ ($J=0,1,2$) a…