Model-Independent Determinations of B -> D l nu , D* l nu Form Factors

Details Model-Independent Determinations of B -> D l nu , D* l nu Form Factors Model-Independent Determinations of B -> D l nu , D* l nu Form Factors

1995-08-02

arxiv.org/abs/hep-ph/9508211v1

Nucl.Phys. B461 (1996) 493-511

Physics

High Energy Physics

High Energy Physics - Phenomenology

uses harvmac and epsf, 22 pages, 3 eps figures included

Scientific paper

We present nonperturbative, model-independent parametrizations of the individual QCD form factors relevant to B -> D* l nu and B -> D l nu decays. These results follow from dispersion relations and analyticity, without recourse to heavy quark symmetry. To describe a form factor with two percent accuracy, three parameters are necessary, one of which is its normalization at zero recoil, F(1). We combine the individual form factors using heavy quark symmetry to extract values for the product |V_{cb}| F(1) from B -> D* l nu data with negligible extrapolation uncertainty.

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