Observation of the $B_s^0\to D^{\ast +}{D}^{\ast -}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1059

The first observation of the $B_s^0\to D^{\ast +}{D}^{\ast -}$ decay and the measurement of its branching ratio relative to the $B^0\to D^{\ast +}{D}^{\ast -}$ decay are presented. The data sample…