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The Cabibbo allowed non-leptonic $B$-decays in two hadrons are studied,within the factorization hypothesis, in the framework of Isgur and Wise theoryfor the matrix elements of the $\Delta B=-\Delta C=\pm 1$ weak currents. The$SU(2)_{HF}$ symmetry relates $|\Delta B|=1$ to $|\Delta C|=1$ currents, whichhave been measured in the semileptonic strange decays of charmed particles. Byassuming colour screening and allowing for $SU(3)$ invariant contributions fromthe annihilation terms with charmed final states one is able to comply with thepresent experimental knowledge.\\ The $CP$ violating asymmetries in neutral $B$decays are given for charmed final states in terms of the $K-M$ angles. Withthe central values found for the annihilation parameters there is a destructive(constructive) interference between the direct and annihilation terms in theCabibbo allowed (doubly forbidden) amplitudes for the decays into$D^{0}(D^{*0})\pi^0$ and $D^0\rho^0$ so that they may be of the same order.This would imply large asymmetries, for which however our present knowledge onthe amplitudes does not allow to predict even their sign.\\ We have betterconfidence in our predictions for the charged final states than the neutralones and can draw the conclusion that the detection of the correspondingasymmetries requires, at least, $10^6$ tagged neutral $B$-particles.Comment: CERNTEX, 17 pages, DSF-92/23, INFN-NA-IV-92/2

Nonleptonic Cabibbo favouredB-decays andCP-asymmetries for charmed final hadron states in Isgur and Wise theory