Dissecting the Hadronic Contributions to (g-2)μ by Schwinger's Sum Rule

Publication type:
Journal article
Metadata:
Autoren
  • Franziska Hagelstein
  • Vladimir Pascalutsa
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000425307100006&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1103/PhysRevLett.120.072002
eISSN
1079-7114
Externe Identifier
  • Clarivate Analytics Document Solution ID: FW4TJ
  • PubMed Identifier: 29542966
ISSN
0031-9007
Ausgabe der Veröffentlichung
7
Zeitschrift
PHYSICAL REVIEW LETTERS
Artikelnummer
ARTN 072002
Datum der Veröffentlichung
2018
Status
Published
Titel
Dissecting the Hadronic Contributions to (<i>g</i>-2)<sub>μ</sub> by Schwinger's Sum Rule
Sub types
  • Article
Ausgabe der Zeitschrift
120

Data source: Web of Science (Lite)

Other metadata sources:
Autoren
  • Franziska Hagelstein
  • Vladimir Pascalutsa
DOI
10.1103/physrevlett.120.072002
eISSN
1079-7114
ISSN
0031-9007
Ausgabe der Veröffentlichung
7
Zeitschrift
Physical Review Letters
Sprache
en
Artikelnummer
072002
Online publication date
2018
Status
Published online
Herausgeber
American Physical Society (APS)
Herausgeber URL
http://dx.doi.org/10.1103/physrevlett.120.072002
Datum der Datenerfassung
2018
Titel
Dissecting the Hadronic Contributions to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>g</mml:mi><mml:mo>−</mml:mo><mml:mn>2</mml:mn><mml:msub><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mi>μ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> by Schwinger’s Sum Rule
Ausgabe der Zeitschrift
120

Data source: Crossref

Abstract
The theoretical uncertainty of (g-2)_{μ} is currently dominated by hadronic contributions. In order to express those in terms of directly measurable quantities, we consider a sum rule relating g-2 to an integral of a photoabsorption cross section. The sum rule, attributed to Schwinger, can be viewed as a combination of two older sum rules: Gerasimov-Drell-Hearn and Burkhardt-Cottingham. The Schwinger sum rule has an important feature, distinguishing it from the other two: the relation between the anomalous magnetic moment and the integral of a photoabsorption cross section is linear, rather than quadratic. The linear property makes it suitable for a straightforward assessment of the hadronic contributions to (g-2)_{μ}. From the sum rule, we rederive the Schwinger α/2π correction, as well as the formula for the hadronic vacuum-polarization contribution. As an example of the light-by-light contribution, we consider the single-meson exchange.
Addresses
  • Institut für Kernphysik & Cluster of Excellence PRISMA, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany.
Autoren
  • Franziska Hagelstein
  • Vladimir Pascalutsa
DOI
10.1103/physrevlett.120.072002
eISSN
1079-7114
Externe Identifier
  • PubMed Identifier: 29542966
Funding acknowledgements
  • Swiss National Science Foundation:
  • Deutsche Forschungsgemeinschaft:
Open access
false
ISSN
0031-9007
Ausgabe der Veröffentlichung
7
Zeitschrift
Physical review letters
Sprache
eng
Medium
Print
Paginierung
072002
Datum der Veröffentlichung
2018
Status
Published
Publisher licence
CC BY
Datum der Datenerfassung
2018
Titel
Dissecting the Hadronic Contributions to (g-2)_{μ} by Schwinger's Sum Rule.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
120

Data source: Europe PubMed Central

Abstract
The theoretical uncertainty of (g-2)_{μ} is currently dominated by hadronic contributions. In order to express those in terms of directly measurable quantities, we consider a sum rule relating g-2 to an integral of a photoabsorption cross section. The sum rule, attributed to Schwinger, can be viewed as a combination of two older sum rules: Gerasimov-Drell-Hearn and Burkhardt-Cottingham. The Schwinger sum rule has an important feature, distinguishing it from the other two: the relation between the anomalous magnetic moment and the integral of a photoabsorption cross section is linear, rather than quadratic. The linear property makes it suitable for a straightforward assessment of the hadronic contributions to (g-2)_{μ}. From the sum rule, we rederive the Schwinger α/2π correction, as well as the formula for the hadronic vacuum-polarization contribution. As an example of the light-by-light contribution, we consider the single-meson exchange.
Autoren
  • Franziska Hagelstein
  • Vladimir Pascalutsa
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/29542966
DOI
10.1103/PhysRevLett.120.072002
eISSN
1079-7114
Ausgabe der Veröffentlichung
7
Zeitschrift
Phys Rev Lett
Sprache
eng
Country
United States
Paginierung
072002
Datum der Veröffentlichung
2018
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
2018
Titel
Dissecting the Hadronic Contributions to (g-2)_{μ} by Schwinger's Sum Rule.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
120

Data source: PubMed

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