Observation of the decay $\ddot{I}{‡}_{c1}(3872)\to J/\ddot{I}ˆ\hat{I}{¼}^{+}\hat{I}{¼}^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1184

The first observation of the $\ddot{I}{‡}_{c1}(3872)\to J/\ddot{I}ˆ\hat{I}{¼}^{+}\hat{I}{¼}^{-}$ decay is reported using proton-proton collision data recorded with the LHCb detector corr…