WEAK TRANSITION FORM-FACTORS BETWEEN HEAVY MESONS

We present an extension of our earlier observations on symmetries in operation in the weak decays of heavy mesons containing a single heavy quark. The new symmetries allow us to obtain absolutely normalized model-independent predictions in the heavy quark limit of all of the form factors for the Q1 →Q2 induced weak pseudoscalar and pseudoscalar to vector transitions in terms of a single universal function ξ(t) with ξ(0) = 1. © 1990.