ESTIMATES OF B-DECAYS INTO K-RESONANCES AND DILEPTONS

Short and long distance contributions to the exclusive B-decays into v arious K-resonances and dileptons, i.e. B --> K(i)l (l) over bar(l = e , mu, v), are examined. The heavy quark effective theory has been used to calculate the hadronic matrix elements. Substantial branching frac tions are obtained for the dileptonic B-decays into some higher excite d states of K-mesons. The long distance (resonance) contributions to t hese exclusive rare B-decay modes dominate the short distance contribu tions mostly by two orders of magnitude. It is pointed out that, exclu ding the resonance contributions, the P-wave channels are dominant, ac counting for about 50% of the inclusive B --> X(s)l(+)l(-) branching f raction.