Analyticity, Shapes of Semileptonic Form Factors, and B to pi l nu

Preprint

11 February 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/9702300

Abstract

We give a pedagogical discussion of the physics underlying dispersion relation-derived parameterizations of form factors describing B -> pi l nu and B -> D l nu. Moments of the dispersion relations are shown to provide substantially tighter constraints on the f_+ (t) form factor describing B -> pi l nu than the unweighted dispersion relation alone. Heavy quark spin symmetry relations between the B -> pi l nu and B^* -> pi l nu form factors enables such constraints to be tightened even further.

Keywords

PEDAGOGICAL DISCUSSION
DISPERSION RELATION
SEMILEPTONIC FORM
FACTOR DESCRIBING
FORM FACTORS
PI L NU

All Related Versions

Version 1, 1997-02-11, ArXiv
Published version: Physical Review D, 56 (1), 303.

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