Extracting |V(ub)| from B->pi l nu Decays Using a Multiply-subtracted Omnes Dispersion Relation

Preprint

24 July 2006

preprint
Published by arXiv in arXiv

Abstract

We use a multiply-subtracted Omnes dispersion relation for the form factor f^+ in B->pi semileptonic decay, allowing the direct input of experimental and theoretical information to constrain its dependence on q^2. Apart from these inputs we use only unitarity and analyticity properties. We obtain |V(ub)|=(4.00 \pm 0.36)\times 10^{-3}.

Keywords

DISPERSION RELATION
MULTIPLY SUBTRACTED
SUBTRACTED OMNES
OMNES DISPERSION
EXTRACTING
NU DECAYS

All Related Versions

Version 1, 2006-07-24, ArXiv
Version 2, 2006-12-17, ArXiv
Published version: Physical Review D, 75 (1).

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