Heavy→light semileptonic decays of pseudoscalar mesons from lattice QCD

We have computed the form factors for B --> pi and D --> K(pi) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are expressed in terms of few parameters which describe the q(2)-dependence and normalization of the form factors. (C) 2001 Published by Elsevier Science B.V.