|V{sub ub}| from exclusive semileptonic B{yields}{pi} decays revisited
|V{sub ub}| from exclusive semileptonic B{yields}{pi} decays revisited
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.
031302-[3pp]
Flynn, Jonathan.M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe
1 August 2007
Flynn, Jonathan.M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe
Flynn, Jonathan.M. and Nieves, Juan
(2007)
|V{sub ub}| from exclusive semileptonic B{yields}{pi} decays revisited.
Physical Review D, 76 (3), .
(doi:10.1103/PHYSREVD.76.031302).
Abstract
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
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Local EPrints ID: 57251
URI: http://eprints.soton.ac.uk/id/eprint/57251
ISSN: 1550-7998
PURE UUID: 54cf3d81-84bd-49c9-b6c5-4a987665bb58
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Date deposited: 14 Aug 2008
Last modified: 16 Mar 2024 02:44
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Author:
Juan Nieves
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