Symmetry-breaking corrections to heavy-to-light B meson form factors at large recoil

Recently it has been shown that symmetries emerging in the heavy quark and large recoil energy limit impose various relations on Form factors that par ameterize the decay of B mesons into light mesons. These symmetries are bro ken by perturbative effects. In this paper we discuss the structure of heav y-to-light Form factors including such effects and compute symmetry-breakin g corrections to first order in the strong coupling. As an application of o ur results we consider the forward-backward asymmetry zero in the rare deca y B --> Vl(+)l(-) and the possibility to constrain potential new physics co ntributions to the Wilson coefficient C-9. (C) 2001 Elsevier Science B.V. A ll rights reserved.