A new model-independent way of extracting |$V_{ub}/V_{cb}$|

The ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and independent of the Fermi motion of the b quark in the B meson. We present a NLO analysis of this rati...

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Detalles Bibliográficos
Autores principales: Aglietti, Ugo, Ciuchini, Marco, Gambino, Paolo
Lenguaje:eng
Publicado: 2002
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(02)00464-9
http://cds.cern.ch/record/547015
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author Aglietti, Ugo
Ciuchini, Marco
Gambino, Paolo
author_facet Aglietti, Ugo
Ciuchini, Marco
Gambino, Paolo
author_sort Aglietti, Ugo
collection CERN
description The ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and independent of the Fermi motion of the b quark in the B meson. We present a NLO analysis of this ratio and show how it can be used to determine |V_ub/V_cb| independently of any model for the shape function. We also discuss how this relation can be used to test the validity of the shape-function theory on the data.
id cern-547015
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
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spelling cern-5470152023-03-14T18:43:40Zdoi:10.1016/S0550-3213(02)00464-9http://cds.cern.ch/record/547015engAglietti, UgoCiuchini, MarcoGambino, PaoloA new model-independent way of extracting |$V_{ub}/V_{cb}$|Particle Physics - PhenomenologyThe ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and independent of the Fermi motion of the b quark in the B meson. We present a NLO analysis of this ratio and show how it can be used to determine |V_ub/V_cb| independently of any model for the shape function. We also discuss how this relation can be used to test the validity of the shape-function theory on the data.The ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and independent of the Fermi motion of the b quark in the B meson. We present a NLO analysis of this ratio and show how it can be used to determine |V_ub/V_cb| independently of any model for the shape function. We also discuss how this relation can be used to test the validity of the shape-function theory on the data.The ratio between the photon spectrum in B → X s γ and the differential semileptonic rate with respect to the hadronic variable M X / E X is a short-distance quantity calculable in perturbation theory and independent of the Fermi motion of the b quark in the B meson. We present a NLO analysis of this ratio and show how it can be used to determine | V ub / V cb | independently of any model for the shape function. We also discuss how this relation can be used to test the validity of the shape-function theory on the data.hep-ph/0204140CERN-TH-2002-069RM3-TH-02-4CERN-TH-2002-069RM-3-TH-2002-04oai:cds.cern.ch:5470152002-04-12
spellingShingle Particle Physics - Phenomenology
Aglietti, Ugo
Ciuchini, Marco
Gambino, Paolo
A new model-independent way of extracting |$V_{ub}/V_{cb}$|
title A new model-independent way of extracting |$V_{ub}/V_{cb}$|
title_full A new model-independent way of extracting |$V_{ub}/V_{cb}$|
title_fullStr A new model-independent way of extracting |$V_{ub}/V_{cb}$|
title_full_unstemmed A new model-independent way of extracting |$V_{ub}/V_{cb}$|
title_short A new model-independent way of extracting |$V_{ub}/V_{cb}$|
title_sort new model-independent way of extracting |$v_{ub}/v_{cb}$|
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(02)00464-9
http://cds.cern.ch/record/547015
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