Factorization and Sudakov resummation in leptonic radiative B decay - a reappraisal

Publication type:
Journal article
Metadata:
Autoren
  • Anne Mareike Galda
  • Matthias Neubert
  • Xing Wang
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000831256400004&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1007/JHEP07(2022)148
Externe Identifier
  • Clarivate Analytics Document Solution ID: 3G3LM
ISSN
1029-8479
Ausgabe der Veröffentlichung
7
Zeitschrift
JOURNAL OF HIGH ENERGY PHYSICS
Schlüsselwörter
  • Effective Field Theories of QCD
  • Factorization
  • Renormalization Group
  • Bottom Quarks
  • Rare Decays
Artikelnummer
ARTN 148
Datum der Veröffentlichung
2022
Status
Published
Titel
Factorization and Sudakov resummation in leptonic radiative <i>B</i> decay - a reappraisal
Sub types
  • Article

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>The <jats:italic>B</jats:italic>-meson light-cone distribution amplitude is an important non- perturbative quantity arising in the factorization of the amplitudes for many exclusive decays of <jats:italic>B</jats:italic> mesons, such as <jats:italic>B</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> → <jats:italic>γℓ</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:inline-formula><jats:alternatives><jats:tex-math>$$ \overline{\nu} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>ν</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula>. We reconsider the renormalization-group (RG) equation satisfied by this function and present its solution at next-to-leading order (NLO) in RG-improved perturbation theory in Laplace space and, for the first time, in momentum space and the so-called diagonal (or dual) space. Since the information needed to describe the <jats:italic>B</jats:italic> decay processes at leading order in Λ<jats:sub>QCD</jats:sub><jats:italic>/m</jats:italic><jats:sub><jats:italic>b</jats:italic></jats:sub> is most directly contained in the distribution amplitude in Laplace space evaluated near the origin, we propose a convenient parameterization of this object in terms of a small set of uncorrelated hadronic parameters. Using recent results on the three-loop anomalous dimension for heavy-light current operators, we derive an expression for the convolution integral appearing in the <jats:italic>B</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> → <jats:italic>γℓ</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:inline-formula><jats:alternatives><jats:tex-math>$$ \overline{\nu} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>ν</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> factorization formula that is explicitly scale independent, and we evaluate this formula at (approximate) NNLO.</jats:p>
Autoren
  • Anne Mareike Galda
  • Matthias Neubert
  • Xing Wang
DOI
10.1007/jhep07(2022)148
eISSN
1029-8479
Ausgabe der Veröffentlichung
7
Zeitschrift
Journal of High Energy Physics
Sprache
en
Artikelnummer
148
Online publication date
2022
Status
Published online
Herausgeber
Springer Science and Business Media LLC
Herausgeber URL
http://dx.doi.org/10.1007/jhep07(2022)148
Datum der Datenerfassung
2022
Titel
Factorization and Sudakov resummation in leptonic radiative B decay — a reappraisal
Ausgabe der Zeitschrift
2022

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