Extracting |V(ub)| from B->pi l nu Decays Using a Multiply-subtracted Omnes Dispersion Relation

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dc.creatorFlynn, Jonathan M
dc.creatorNieves, Juan
dc.date2006-07-24
dc.date2006-12-17
dc.date.accessioned2026-07-07T11:05:18Z
dc.date.available2026-07-07T11:05:18Z
dc.descriptionWe 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. Apart from these inputs we use only unitarity and analyticity properties. We obtain |V(ub)|=(4.02 \pm 0.35)\times 10^{-3}, improving the agreement with the value determined from inclusive methods, and competitive in precision with them.
dc.description10 pages, 4 figures. We include experimental data from BaBar (hep-ex/0607089). Approved for publication in PRD
dc.identifierhttps://arxiv.org/abs/hep-ph/0607258
dc.identifierhttp://arxiv.org/abs/hep-ph/0607258
dc.identifierPhys.Rev.D75:013008,2007
dc.identifierdoi:10.1103/PhysRevD.75.013008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189165
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Lattice
dc.titleExtracting |V(ub)| from B->pi l nu Decays Using a Multiply-subtracted Omnes Dispersion Relation
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