Xing, ZZ (reprint author), CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
The first observation of the (B) over bar (0)(d) --> (DR0)-R-0 and (B) over bar (0)(d) --> D-0(K) over bar*(0) transitions by the Belle Collabd oration 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 37degrees less than or equal to (phi(1) - phi(0))DK less than or equal to 63degrees (or around 50degrees) and 25degrees less than or equal to (phi(1) - phi(0))DK* less than or equal to 50degrees (or around 35degrees), although the possibility (phi(1) - phi(0))DK = (phi(1) - phi(0))DK* = 0degrees cannot be ruled out at present. Thus significant final-state rescattering effects possibly exist in such exclusive \DeltaB\ = \DeltaC\ = \DeltaS\ = 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 --> Dpi and B --> Dp 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 (B) over bar (0)(d) (D) over bar (0) --> (K) over bar ((*)0), B-u(-) --> (D) over bar K-0((*)) and B-u(-) --> D-(K) over bar ((*)0) transitions.