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 |
| Item ID: | 57248 |
| Date Deposited: | 14 Aug 2008 |
| Last Modified: | 23 Jul 2012 11:05 |
| Contributors: | Flynn, Jonathan M. (Author) Nieves, Juan (Author) |
| Date: | 2007 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/57248 |
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