Extracting |V(ub)| from B -> pi l nu decays using a multiply-subtracted Omnes dispersion relation


Flynn, Jonathan M. and Nieves, Juan (2007) Extracting |V(ub)| from B -> pi l nu decays using a multiply-subtracted Omnes dispersion relation. Physical Review D, 75, (1), 013008-[6pp]. (doi:10.1103/PhysRevD.75.013008).

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Description/Abstract

We use a multiply-subtracted Omnès 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 q2, thereby improving the precision of the extracted value of |Vub|. Apart from these inputs we use only unitarity and analyticity properties. We obtain |Vub|=(4.02±0.35)×10-3, improving the agreement with the value determined from inclusive methods, and competitive in precision with them.

Item Type: Article
ISSNs: 1550-7998 (print)
Related URLs:
Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 57248
Date Deposited: 14 Aug 2008
Last Modified: 27 Mar 2014 18:39
URI: http://eprints.soton.ac.uk/id/eprint/57248

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