Final-state rescattering and SU(3) symmetry breaking in B→DK and B→DK* decays

The first observation of the anti B0d→D0 anti K0 and anti B0d→D0 anti K*0 transitions by the Belle Collaboration allows us to do a complete isospin analysis of the B→DK(*) decay modes. We find that their respective isospin phase shifts are very likely to lie in the ranges 37 circle ≤(φ1-φ0)DK≤63 circle (or around 50 circle) and 25 circle ≤(φ1 -φ0)DK*≤50 circle (or around 35 circle), although the possibility (φ1 -φ0)DK = (φ1 -φ0)DK* = 0 circle cannot be ruled out at present. Thus significant final-state rescattering effects possibly exist in such exclusive vertical stroke ΔB vertical stroke = vertical stroke ΔC vertical stroke = vertical stroke ΔS vertical stroke =1 processes. We determine the spectator and color-suppressed spectator quark-diagram amplitudes of the B→DK and B→DK* decays, and compare them with the corresponding quark-diagram amplitudes of the B→Dπ and B→Dρ decays. The effects of SU(3) flavor symmetry breaking are in most cases understandable in the factorization approximation, which works for the individual isospin amplitudes. Very instructive predictions are also obtained for the branching fractions of rare anti B0d → anti D0 anti K(*)0, B-u → anti D0 K(*)- and B-u →D- anti K(*)0 transitions. (orig.)