CHARMED DECAYS OF THE B-MESON IN THE QUARK-MODEL

Exclusive and inclusive, semileptonic and non-leptonic, charmed decays of the B-meson are investigated in the context of a phenomenological quark model. Bound-state effects are taken care of by adopting a singl e (model-dependent) non-perturbative wave function, describing the mot ion of the light spectator quark in the B-meson. A nice reproduction o f both exclusive and inclusive semileptonic data is obtained. Our pred ictions for the electron spectrum are presented and compared with thos e of the Isgur-Scora-Grinstein-Wise quark model. Finally, our approach is applied to the calculation of inclusive non-leptonic widths, obtai ning a remarkable agreement with experimental findings.