|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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Description/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.

Item Type: Article
ISSNs: 0556-2821 (print)
Related URLs:
Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 57251
Date Deposited: 14 Aug 2008
Last Modified: 27 Mar 2014 18:39
URI: http://eprints.soton.ac.uk/id/eprint/57251

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