Dispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form Factors

Dispersive constraints on the shape of the form factors which describe the exclusive decays B -> D^(*) l nu are derived by fully exploiting spin symmetry in the ground-state doublet of heavy-light mesons. The analysis includes all twenty B^(*) -> D^(*) semileptonic form factors. Heavy-quark sy...

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Detalles Bibliográficos
Autores principales: Caprini, I, Lellouch, L P, Neubert, M
Lenguaje:eng
Publicado: 1998
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(98)00350-2
http://cds.cern.ch/record/341849
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author Caprini, I
Lellouch, L P
Neubert, M
author_facet Caprini, I
Lellouch, L P
Neubert, M
author_sort Caprini, I
collection CERN
description Dispersive constraints on the shape of the form factors which describe the exclusive decays B -> D^(*) l nu are derived by fully exploiting spin symmetry in the ground-state doublet of heavy-light mesons. The analysis includes all twenty B^(*) -> D^(*) semileptonic form factors. Heavy-quark symmetry, with both short-distance and 1/m_Q corrections included, is used to provide relations between the form factors near zero recoil. Simple one-parameter functions are derived, which describe the form factors in the semileptonic region with an accuracy of better than 2%. The implications of our results for the determination of |V_cb| are discussed.
id cern-341849
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-3418492019-09-30T06:29:59Zdoi:10.1016/S0550-3213(98)00350-2http://cds.cern.ch/record/341849engCaprini, ILellouch, L PNeubert, MDispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form FactorsParticle Physics - PhenomenologyDispersive constraints on the shape of the form factors which describe the exclusive decays B -> D^(*) l nu are derived by fully exploiting spin symmetry in the ground-state doublet of heavy-light mesons. The analysis includes all twenty B^(*) -> D^(*) semileptonic form factors. Heavy-quark symmetry, with both short-distance and 1/m_Q corrections included, is used to provide relations between the form factors near zero recoil. Simple one-parameter functions are derived, which describe the form factors in the semileptonic region with an accuracy of better than 2%. The implications of our results for the determination of |V_cb| are discussed.hep-ph/9712417CERN-TH-97-091CPT-3480oai:cds.cern.ch:3418491998-01-05
spellingShingle Particle Physics - Phenomenology
Caprini, I
Lellouch, L P
Neubert, M
Dispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form Factors
title Dispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form Factors
title_full Dispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form Factors
title_fullStr Dispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form Factors
title_full_unstemmed Dispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form Factors
title_short Dispersive Bounds on the Shape of $\overline{B} \to D^{*}l\overline\nu$ Form Factors
title_sort dispersive bounds on the shape of $\overline{b} \to d^{*}l\overline\nu$ form factors
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(98)00350-2
http://cds.cern.ch/record/341849
work_keys_str_mv AT caprinii dispersiveboundsontheshapeofoverlinebtodloverlinenuformfactors
AT lellouchlp dispersiveboundsontheshapeofoverlinebtodloverlinenuformfactors
AT neubertm dispersiveboundsontheshapeofoverlinebtodloverlinenuformfactors

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