2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96092We study semileptonic B decays, using MILC dynamical configurations with $N_f=2+1$. NRQCD heavy and AsqTad light quark actions are used. We obtain the semileptonic form factors $f_+(q^2)$ and $f_0(q^2)$ in the chiral limit.6 pages, 3 figures, talk presented at Lattice 2005 (Heavy quark physics)High Energy Physics - Latticetext