Final-state phases in B→Dπ, D*π, and Dρ decays

The final-state phases in B-bar→Dπ, D*π, and Dρ decays appear to follow a pattern similar to those in D→K-barπ, K-bar*π, and K-barρ decays. Each set of processes is characterized by three charge states but only two independent amplitudes, so the amplitudes form triangles in the complex plane. For the first two sets the triangles appear to have nonzero area, while for the Dρ or K-barρ decays the areas of the triangles are consistent with zero. Following an earlier discussion of this behavior for D decays, a similar analysis is performed for B decays, and the relative phases and magnitudes of contributing amplitudes are determined. The significance of recent results on B-bar0→D(*)0K-bar(*)0 is noted. Open theoretical and experimental questions are indicated