Lattice-Constrained Parametrizations of Form Factors for Semileptonic and Rare Radiative B Decays
UKQCD Collaboration, L Del Debbio, J M Flynn, L Lellouch, J Nieves
Abstract
We describe the form factors for semileptonic B to rho l nu and radiative B to K* gamma decays with just two parameters and the two form factors for semileptonic B to pi l nu decays with three parameters. The parametrizations are constrained by lattice results and are consistent with heavy quark symmetry, kinematic constraints and light cone sum rule scaling relations.
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