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|V{sub ub}| from exclusive semileptonic B{yields}{pi} decays revisited

Flynn, Jonathan.M. and Nieves, Juan (2007) |V{sub ub}| from exclusive semileptonic B{yields}{pi} decays revisited Physical Review D, 76, (3), 031302-[3pp]. (doi:10.1103/PHYSREVD.76.031302).

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We update the extraction of |V{sub ub}| from exclusive semileptonic B{yields}{pi} decays, combining experimental partial branching fraction information with theoretical form-factor calculations, using the recently revised HPQCD results for the form factors f{sub +} and f{sub 0}. We use Omnes representations to provide the required parametrizations of the form factors. The extracted value is |V{sub ub}|=(3.47{+-}0.29{+-}0.03)x10{sup -3}, in striking agreement with |V{sub ub}| extracted using all other inputs in CKM fits and showing some disagreement with |V{sub ub}| extracted from inclusive semileptonic B{yields}{pi} decays.

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Published date: 1 August 2007
Organisations: Physics & Astronomy


Local EPrints ID: 57251
ISSN: 1550-7998
PURE UUID: 54cf3d81-84bd-49c9-b6c5-4a987665bb58
ORCID for Jonathan.M. Flynn: ORCID iD

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Date deposited: 14 Aug 2008
Last modified: 17 Jul 2017 14:29

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Author: Jonathan.M. Flynn ORCID iD
Author: Juan Nieves

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