Extracting vertical bar V{sub ub} vertical bar from B{yields}{pi}l{nu} decays using a multiply-subtracted Omnes dispersion relation
Journal Article
·
· Physical Review. D, Particles Fields
- School of Physics and Astronomy, University of Southampton Highfield, Southampton SO17 1BJ (United Kingdom)
- Departamento de Fisica Atomica, Molecular y Nuclear, Universidad de Granada, E-18071 Granada (Spain)
We use a multiply-subtracted Omnes dispersion relation for the form factor f{sup +} in B{yields}{pi} semileptonic decay, allowing the direct input of experimental and theoretical information to constrain its dependence on q{sup 2}, thereby improving the precision of the extracted value of vertical bar V{sub ub} vertical bar. Apart from these inputs we use only unitarity and analyticity properties. We obtain vertical bar V{sub ub} vertical bar=(4.02{+-}0.35)x10{sup -3}, improving the agreement with the value determined from inclusive methods, and competitive in precision with them.
- OSTI ID:
- 20933211
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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