2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42864We report on the Lattice determination of the semileptonic form factors by lattice QCD. Comparison with the light-cone QCD sum rules are made for $\Btopi, \Btorho$ semileptonic decays.proceedings for the workshop on the CKM Unitarity Triangle, IPPP Durham, April 2003High Energy Physics - Phenomenologytext