Renormalization and scale evolution of the soft-quark soft function

Publication type:
Journal article
Metadata:
Autoren
  • Ze Long Liu
  • Bianka Mecaj
  • Matthias Neubert
  • Xing Wang
  • Sean Fleming
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000549713200001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1007/JHEP07(2020)104
Externe Identifier
  • Clarivate Analytics Document Solution ID: ML8MP
ISSN
1029-8479
Ausgabe der Veröffentlichung
7
Zeitschrift
JOURNAL OF HIGH ENERGY PHYSICS
Schlüsselwörter
  • Effective Field Theories
  • Renormalization Group
  • Resummation
  • Perturbative QCD
Artikelnummer
ARTN 104
Datum der Veröffentlichung
2020
Status
Published
Titel
Renormalization and scale evolution of the soft-quark soft function
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>Soft functions defined in terms of matrix elements of soft fields dressed by Wilson lines are central components of factorization theorems for cross sections and decay rates in collider and heavy-quark physics. While in many cases the relevant soft functions are defined in terms of gluon operators, at subleading order in power counting soft functions containing quark fields appear. We present a detailed discussion of the properties of the soft-quark soft function consisting of a quark propagator dressed by two finite-length Wilson lines connecting at one point. This function enters in the factorization theorem for the Higgs-boson decay amplitude of the <jats:italic>h → γγ</jats:italic> process mediated by light-quark loops. We perform the renormalization of this soft function at one-loop order, present a conjecture for its two-loop anomalous dimension and discuss solutions to its renormalization-group evolution equation in momentum space, in Laplace space and in the “diagonal space”, where the evolution is strictly local in the momentum variable.</jats:p>
Autoren
  • Ze Long Liu
  • Bianka Mecaj
  • Matthias Neubert
  • Xing Wang
  • Sean Fleming
DOI
10.1007/jhep07(2020)104
eISSN
1029-8479
Ausgabe der Veröffentlichung
7
Zeitschrift
Journal of High Energy Physics
Sprache
en
Artikelnummer
104
Online publication date
2020
Datum der Veröffentlichung
2020
Status
Published
Herausgeber
Springer Science and Business Media LLC
Herausgeber URL
http://dx.doi.org/10.1007/jhep07(2020)104
Datum der Datenerfassung
2021
Titel
Renormalization and scale evolution of the soft-quark soft function
Ausgabe der Zeitschrift
2020

Data source: Crossref

Abstract
Soft functions defined in terms of matrix elements of soft fields dressed by Wilson lines are central components of factorization theorems for cross sections and decay rates in collider and heavy-quark physics. While in many cases the relevant soft functions are defined in terms of gluon operators, at subleading order in power counting soft functions containing quark fields appear. We present a detailed discussion of the properties of the soft-quark soft function consisting of a quark propagator dressed by two finite-length Wilson lines connecting at one point. This function enters in the factorization theorem for the Higgs-boson decay amplitude of the $h\to\gamma\gamma$ process mediated by light-quark loops. We perform the renormalization of this soft function at one-loop order, derive its two-loop anomalous dimension and discuss solutions to its renormalization-group evolution equation in momentum space, in Laplace space and in the "diagonal space", where the evolution is strictly multiplicative.
Autoren
  • Ze Long Liu
  • Bianka Mecaj
  • Matthias Neubert
  • Xing Wang
  • Sean Fleming
Autoren-URL
http://arxiv.org/abs/2005.03013v1
Schlüsselwörter
  • hep-ph
  • hep-ph
  • hep-th
Notes
30 pages plus appendices and references, 6 figures
Datum der Veröffentlichung
2020
Herausgeber URL
http://dx.doi.org/10.1007/JHEP07(2020)104
Datum der Datenerfassung
2020
Datum, an dem der Datensatz öffentlich gemacht wurde
2020
Titel
Renormalization and Scale Evolution of the Soft-Quark Soft Function

Files

2005.03013v1.pdf

Data source: arXiv

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