The B→ D(D*)eν decay amplitude factorization and the Isgur-Wise function calculation
Ivanov M. A., Khomutenko O. E.
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 MQ -> oo.