First evidence of $X(3872)\to \ddot{I}{€}^0\ddot{I}{‡}_{c0}(1P)$ and search for $X(3915)\to \ddot{I}{€}^0\ddot{I}{‡}_{c1}(1P)$

Belle, Belle II Collaborations, : +412

We search for the pionic transitions $X(3872)\to \ddot{I}{€}^0\ddot{I}{‡}_{cJ}(1P)$ $(J=0,1,2)$ and $X(3915)\to \ddot{I}{€}^0\ddot{I}{‡}_{c1}$ in $B^{+}\to \ddot{I}{€}^0\ddot{I}{‡}_{cJ}{K}^{+}$ decays using the Belle and Belle~II data sam…