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

Extracting |V(ub)| from B -> pi l nu decays using a multiply-subtracted Omnes dispersion relation
Extracting |V(ub)| from B -> pi l nu decays using a multiply-subtracted Omnes dispersion relation
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.
1550-7998
013008-[6pp]
Flynn, Jonathan M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe
Flynn, Jonathan M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Nieves, Juan
7d5cbd0b-f25d-44f0-be50-fdecb2e54bfe

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

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.

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Published date: 2007
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Identifiers

Local EPrints ID: 57248
URI: http://eprints.soton.ac.uk/id/eprint/57248
DOI: doi:10.1103/PhysRevD.75.013008
ISSN: 1550-7998
PURE UUID: df931530-57f8-498c-ada6-5d438bd793a6
ORCID for Jonathan M. Flynn: ORCID iD orcid.org/0000-0002-6280-1677

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Date deposited: 14 Aug 2008
Last modified: 16 Mar 2024 02:44

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

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