Measurement of branching fraction ratios for $B^{+}\to D^{\ast +}{D}^{-}{K}^{+}$, $B^{+}\to D^{\ast -}{D}^{+}{K}^{+}$, and $B^0\to D^{\ast -}{D}^0{K}^{+}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +914

A measurement of four branching-fraction ratios for three-body decays of $B$ mesons involving two open-charm hadrons in the final state is presented. Run 1 and Run 2 $pp$ collision…