PHENOMENOLOGICAL BOUNDS ON B TO LIGHT SEMILEPTONIC FORM FACTORS

Abstract

The form factors for the weak currents between B and light mesons are studied by relating them to the corresponding D form factors at [Formula: see text] according to HQET, by evaluating them at q2=0 by QCD sum rules, and by assuming a polar q2 dependence. The results found are consistent with the information obtained from exclusive non-leptonic two-body decays and, with the only exception of A1, with lattice calculations.