Dispersive Approach to Semileptonic Form-Factors in Heavy-to-Light Meson Decays
Burdman, Gustavo · Kambor, Joachim
Original · EN
We study the semileptonic decays of heavy mesons into light pseudoscalars by making use of dispersion relations. Constraints from heavy quark symmetry, chiral symmetry and perturbative QCD are implemented into a dispersive model for the form-factors. Large deviations from B*-pole dominance are observed in B→πℓν. We discuss the model prediction for this mode and its possible impact on the extraction of |Vub|.
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