THE B-]D(D-ASTERISK)E-NU DECAY AMPLITUDE FACTORIZATION AND THE ISGUR-WISE FUNCTION CALCULATION

A new approach to the relativistic system of heavy and light quarks, in which a light quark is confined and a heavy quark behaves as an ordinary Fermi particle with a large mass, is formulated. The form factors for the B --> D(D *) ev decay are calculated on the basis of this approach. The Isgur-Wise function is obtained in the heavy quark limit M(Q) --> infinity.