Extracting vertical bar V-ub vertical bar from B ->pi l nu decays using a multiply-subtracted Omnes dispersion relation
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Extracting vertical bar V-ub vertical bar from B ->pi l nu decays using a multiply-subtracted Omnes dispersion relation

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Extracting vertical bar V-ub vertical bar from B ->pi l nu decays using a multiply-subtracted Omnes dispersion relation

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Flynn, Jonathan M.; Nieves Pamplona, Juan Miguel
Aquest document és un/a article, creat/da en: 2007
We use a multiply-subtracted Omnes 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 q(2), thereby improving the precision of the extracted value of vertical bar V-ub vertical bar. Apart from these inputs we use only unitarity and analyticity properties. We obtain vertical bar V-ub vertical bar=(4.02 +/- 0.35)x10(-3), improving the agreement with the value determined from inclusive methods, and competitive in precision with them.

    Flynn, Jonathan M. Nieves Pamplona, Juan Miguel 2007 Extracting vertical bar V-ub vertical bar from B ->pi l nu decays using a multiply-subtracted Omnes dispersion relation Physical Review D 75 1 013008
http://dx.doi.org/10.1103/PhysRevD.75.013008
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