The charm-quark contribution to light-by-light scattering in the muon (g-2) from lattice QCD

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • En-Hung Chao
  • Renwick J Hudspith
  • Antoine Gerardin
  • Jeremy R Green
  • Harvey B Meyer
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000836409500003&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1140/epjc/s10052-022-10589-2
eISSN
1434-6052
Externe Identifier
  • Clarivate Analytics Document Solution ID: 3N8PZ
  • PubMed Identifier: 35937708
ISSN
1434-6044
Ausgabe der Veröffentlichung
8
Zeitschrift
EUROPEAN PHYSICAL JOURNAL C
Artikelnummer
ARTN 664
Datum der Veröffentlichung
2022
Status
Published
Titel
The charm-quark contribution to light-by-light scattering in the muon (<i>g</i>-2) from lattice QCD
Sub types
  • Article
Ausgabe der Zeitschrift
82

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:title>Abstract</jats:title><jats:p>We compute the hadronic light-by-light scattering contribution to the muon <jats:inline-formula><jats:alternatives><jats:tex-math>$$g-2$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>g</mml:mi> <mml:mo>-</mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> from the charm quark using lattice QCD. The calculation is performed on ensembles generated with dynamical (<jats:italic>u</jats:italic>, <jats:italic>d</jats:italic>, <jats:italic>s</jats:italic>) quarks at the SU(3)<jats:inline-formula><jats:alternatives><jats:tex-math>$$_\mathrm{f}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow /> <mml:mi>f</mml:mi> </mml:msub> </mml:math></jats:alternatives></jats:inline-formula> symmetric point with degenerate pion and kaon masses of around 415 MeV. It includes the connected charm contribution, as well as the leading disconnected Wick contraction, involving the correlation between a charm and a light-quark loop. Cutoff effects turn out to be sizeable, which leads us to use lighter-than-physical charm masses, to employ a broad range of lattice spacings reaching down to 0.039 fm and to perform a combined charm-mass and continuum extrapolation. We use the <jats:inline-formula><jats:alternatives><jats:tex-math>$$\eta _c$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>η</mml:mi> <mml:mi>c</mml:mi> </mml:msub> </mml:math></jats:alternatives></jats:inline-formula> meson to define the physical charm-mass point and obtain a final value of <jats:inline-formula><jats:alternatives><jats:tex-math>$$a_\mu ^\mathrm{HLbL,c}= (2.8\pm 0.5) \times 10^{-11}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msubsup> <mml:mi>a</mml:mi> <mml:mi>μ</mml:mi> <mml:mrow> <mml:mi>HLbL</mml:mi> <mml:mo>,</mml:mo> <mml:mi>c</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>=</mml:mo> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>2.8</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.5</mml:mn> <mml:mo>)</mml:mo> </mml:mrow> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>11</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>, whose uncertainty is dominated by the systematics of the extrapolation. Our result is consistent with the estimate based on a simple charm-quark loop, whilst being free of any perturbative scheme dependence on the charm mass. The mixed charm–light disconnected contraction contributes a small negative amount to the final value.</jats:p>
Autoren
  • En-Hung Chao
  • Renwick J Hudspith
  • Antoine Gérardin
  • Jeremy R Green
  • Harvey B Meyer
DOI
10.1140/epjc/s10052-022-10589-2
eISSN
1434-6052
Ausgabe der Veröffentlichung
8
Zeitschrift
The European Physical Journal C
Sprache
en
Artikelnummer
664
Online publication date
2022
Status
Published online
Herausgeber
Springer Science and Business Media LLC
Herausgeber URL
http://dx.doi.org/10.1140/epjc/s10052-022-10589-2
Datum der Datenerfassung
2022
Titel
The charm-quark contribution to light-by-light scattering in the muon $$(g-2)$$ from lattice QCD
Ausgabe der Zeitschrift
82

Datenquelle: Crossref

Abstract
We compute the hadronic light-by-light scattering contribution to the muon g - 2 from the charm quark using lattice QCD. The calculation is performed on ensembles generated with dynamical (<i>u</i>, <i>d</i>, <i>s</i>) quarks at the SU(3) f symmetric point with degenerate pion and kaon masses of around 415 MeV. It includes the connected charm contribution, as well as the leading disconnected Wick contraction, involving the correlation between a charm and a light-quark loop. Cutoff effects turn out to be sizeable, which leads us to use lighter-than-physical charm masses, to employ a broad range of lattice spacings reaching down to 0.039 fm and to perform a combined charm-mass and continuum extrapolation. We use the η c meson to define the physical charm-mass point and obtain a final value of a μ HLbL , c = ( 2.8 ± 0.5 ) × 10 - 11 , whose uncertainty is dominated by the systematics of the extrapolation. Our result is consistent with the estimate based on a simple charm-quark loop, whilst being free of any perturbative scheme dependence on the charm mass. The mixed charm-light disconnected contraction contributes a small negative amount to the final value.
Addresses
  • PRISMA+ Cluster of Excellence, Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany.
Autoren
  • En-Hung Chao
  • Renwick J Hudspith
  • Antoine Gérardin
  • Jeremy R Green
  • Harvey B Meyer
DOI
10.1140/epjc/s10052-022-10589-2
eISSN
1434-6052
Externe Identifier
  • PubMed Identifier: 35937708
  • PubMed Central ID: PMC9345843
Open access
true
ISSN
1434-6044
Ausgabe der Veröffentlichung
8
Zeitschrift
The European physical journal. C, Particles and fields
Sprache
eng
Medium
Print-Electronic
Online publication date
2022
Open access status
Open Access
Paginierung
664
Datum der Veröffentlichung
2022
Status
Published
Publisher licence
CC BY
Datum der Datenerfassung
2022
Titel
The charm-quark contribution to light-by-light scattering in the muon ( g - 2 ) from lattice QCD.
Sub types
  • research-article
  • Journal Article
Ausgabe der Zeitschrift
82

Files

https://link.springer.com/content/pdf/10.1140/epjc/s10052-022-10589-2.pdf https://europepmc.org/articles/PMC9345843?pdf=render

Datenquelle: Europe PubMed Central

Abstract
We compute the hadronic light-by-light scattering contribution to the muon g - 2 from the charm quark using lattice QCD. The calculation is performed on ensembles generated with dynamical (u, d, s) quarks at the SU(3) f symmetric point with degenerate pion and kaon masses of around 415 MeV. It includes the connected charm contribution, as well as the leading disconnected Wick contraction, involving the correlation between a charm and a light-quark loop. Cutoff effects turn out to be sizeable, which leads us to use lighter-than-physical charm masses, to employ a broad range of lattice spacings reaching down to 0.039 fm and to perform a combined charm-mass and continuum extrapolation. We use the η c meson to define the physical charm-mass point and obtain a final value of a μ HLbL , c = ( 2.8 ± 0.5 ) × 10 - 11 , whose uncertainty is dominated by the systematics of the extrapolation. Our result is consistent with the estimate based on a simple charm-quark loop, whilst being free of any perturbative scheme dependence on the charm mass. The mixed charm-light disconnected contraction contributes a small negative amount to the final value.
Date of acceptance
2022
Autoren
  • En-Hung Chao
  • Renwick J Hudspith
  • Antoine Gérardin
  • Jeremy R Green
  • Harvey B Meyer
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/35937708
DOI
10.1140/epjc/s10052-022-10589-2
Externe Identifier
  • PubMed Central ID: PMC9345843
ISSN
1434-6044
Ausgabe der Veröffentlichung
8
Zeitschrift
Eur Phys J C Part Fields
Sprache
eng
Country
France
Paginierung
664
PII
10589
Datum der Veröffentlichung
2022
Status
Published
Titel
The charm-quark contribution to light-by-light scattering in the muon ( g - 2 ) from lattice QCD.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
82

Datenquelle: PubMed

Author's licence
CC-BY
Autoren
  • En-Hung Chao
  • Renwick J Hudspith
  • Antoine Gérardin
  • Jeremy R Green
  • Harvey B Meyer
Hosting institution
Universitätsbibliothek Mainz
Sammlungen
  • DFG-491381577-D
Resource version
Published version
DOI
10.1140/epjc/s10052-022-10589-2
File(s) embargoed
false
Open access
true
ISSN
1434-6052
Zeitschrift
The European physical journal : C, Particles and fields
Schlüsselwörter
  • 530 Physik
  • 530 Physics
Sprache
eng
Open access status
Open Access
Paginierung
664
Datum der Veröffentlichung
2022
Public URL
https://openscience.ub.uni-mainz.de/handle/20.500.12030/8935
Herausgeber
Springer
Datum der Datenerfassung
2023
Datum, an dem der Datensatz öffentlich gemacht wurde
2023
Zugang
Public
Titel
The charm-quark contribution to light-by-light scattering in the muon (g − 2) from lattice QCD
Ausgabe der Zeitschrift
82

Files

the_charmquark_contribution_t-20230309100415358.pdf

Datenquelle: OPENSCIENCE.UB

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