The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory

Recently, we have derived light-cone sum rules for exclusive B-meson decays into light energetic hadrons from correlation functions within soft-collinear effective theory. In these sum rules the short-distance scale refers to ``hard-collinear'' interactions with virtualities of order \Lamb...

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Detalles Bibliográficos
Autores principales: Hurth, Tobias, De Fazio, Fulvia, Feldmann, Thorsten
Lenguaje:eng
Publicado: 2005
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.22323/1.021.0215
http://cds.cern.ch/record/884507
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author Hurth, Tobias
De Fazio, Fulvia
Feldmann, Thorsten
author_facet Hurth, Tobias
De Fazio, Fulvia
Feldmann, Thorsten
author_sort Hurth, Tobias
collection CERN
description Recently, we have derived light-cone sum rules for exclusive B-meson decays into light energetic hadrons from correlation functions within soft-collinear effective theory. In these sum rules the short-distance scale refers to ``hard-collinear'' interactions with virtualities of order \Lambda_{QCD} m_b. Hard scales (related to virtualities of order m_b^2) are integrated out and enter via external coefficient functions in the sum rule. Soft dynamics is encoded in light-cone distribution amplitudes for the B-meson, which describe both the factorizable and non-factorizable contributions to exclusive B-meson decay amplitudes. Factorization of the correlation function has been verified to one-loop accuracy. Thus, a systematic separation of hard, hard-collinear, and soft dynamics in the heavy-quark limit is possible.
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spelling cern-8845072023-03-14T20:07:59Zdoi:10.22323/1.021.0215http://cds.cern.ch/record/884507engHurth, TobiasDe Fazio, FulviaFeldmann, ThorstenThe $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theoryParticle Physics - PhenomenologyRecently, we have derived light-cone sum rules for exclusive B-meson decays into light energetic hadrons from correlation functions within soft-collinear effective theory. In these sum rules the short-distance scale refers to ``hard-collinear'' interactions with virtualities of order \Lambda_{QCD} m_b. Hard scales (related to virtualities of order m_b^2) are integrated out and enter via external coefficient functions in the sum rule. Soft dynamics is encoded in light-cone distribution amplitudes for the B-meson, which describe both the factorizable and non-factorizable contributions to exclusive B-meson decay amplitudes. Factorization of the correlation function has been verified to one-loop accuracy. Thus, a systematic separation of hard, hard-collinear, and soft dynamics in the heavy-quark limit is possible.Recently, we have derived light-cone sum rules for exclusive B-meson decays into light energetic hadrons from correlation functions within soft-collinear effective theory. In these sum rules the short-distance scale refers to ``hard-collinear'' interactions with virtualities of order \Lambda_{QCD} m_b. Hard scales (related to virtualities of order m_b^2) are integrated out and enter via external coefficient functions in the sum rule. Soft dynamics is encoded in light-cone distribution amplitudes for the B-meson, which describe both the factorizable and non-factorizable contributions to exclusive B-meson decay amplitudes. Factorization of the correlation function has been verified to one-loop accuracy. Thus, a systematic separation of hard, hard-collinear, and soft dynamics in the heavy-quark limit is possible.hep-ph/0509167SLAC-PUB-11484CERN-PH-TH-2005-167BARI-TH-05-518SI-HEP-2005-12BARI-TH-518CERN-PH-TH-2005-167SI-HEP-2005-12SLAC-PUB-11484oai:cds.cern.ch:8845072005-09-16
spellingShingle Particle Physics - Phenomenology
Hurth, Tobias
De Fazio, Fulvia
Feldmann, Thorsten
The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
title The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
title_full The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
title_fullStr The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
title_full_unstemmed The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
title_short The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
title_sort $b \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.22323/1.021.0215
http://cds.cern.ch/record/884507
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