The University of Southampton
University of Southampton Institutional Repository

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).

Record type: Article


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.

Full text not available from this repository.

More information

Published date: 2007


Local EPrints ID: 57248
ISSN: 1550-7998
PURE UUID: df931530-57f8-498c-ada6-5d438bd793a6
ORCID for Jonathan M. Flynn: ORCID iD

Catalogue record

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

Export record



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

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.