Invariant mass distributions of selected $ B ^\pm \rightarrow [ K ^\pm \pi^{\mp}]_Dh^{\pm}$ candidates. The left plots are $ B ^- $ candidates, $ B ^+ $ are on the right. In the top plots, the bachelor track passes the ${\rm DLL}_{K\pi}>4$ cut and the $B$ candidates are reconstructed assigning this track the kaon mass. The remaining events are placed in the sample displayed on the bottom row and are reconstructed with a pion mass hypothesis. The dark (red) curve represents the $ B \rightarrow D K ^\pm $ events, the light (green) curve is $ B \rightarrow D\pi ^\pm $. The shaded contribution are partially reconstructed events and the total PDF includes the combinatorial component.

Invariant mass distributions of selected $ B ^\pm \rightarrow [ K ^+ K ^- ]_Dh^{\pm}$ candidates. See the caption of Fig. 1 for a full description. The contribution from $\Lambda_b\rightarrow \Lambda_c^{\pm} h^{\mp}$ decays is indicated by the dashed line.

Invariant mass distributions of selected $ B ^\pm \rightarrow [\pi ^+ \pi ^- ]_Dh^{\pm}$ candidates. See the caption of Fig. 1 for a full description.

Invariant mass distributions of selected $ B ^\pm \rightarrow [\pi ^\pm K^{\mp}]_Dh^{\pm}$ candidates. See the caption of Fig. 1 for a full description. The dashed line here represents the partially reconstructed, but Cabibbo favoured, $ B ^0_ s \rightarrow \overline{ D }{} ^0 K ^- \pi ^+ $ and $\overline{ B }{} ^0_ s \rightarrow D ^0 K ^+ \pi ^- $ decays where the pions are lost. The pollution from favoured mode cross feed is drawn, but is too small to be seen.

Animated gif made out of all figures.

Corrected event yields.

Systematic uncertainties on the observables. PID refers to the fixed efficiency of the ${\rm DLL}_{K\pi}$ cut on the bachelor track. PDFs refers to the variations of the fixed shapes in the fit. "Sim" refers to the use of simulation to estimate relative efficiencies of the signal modes which includes the branching fraction estimates of the $\Lambda_b^0$ background. $A_{\rm instr.}$ quantifies the uncertainty on the production, interaction and detection asymmetries.