Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCD
Abstract In order to reach a precision of 0.2% on the hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon, (g – 2) μ , such that the full Standard-Model prediction matches in precision the direct experimental measurement, it is crucial to include the leading,...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-07-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP07(2025)201 |
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| author | Julian Parrino Volodymyr Biloshytskyi En-Hung Chao Harvey B. Meyer Vladimir Pascalutsa |
| author_facet | Julian Parrino Volodymyr Biloshytskyi En-Hung Chao Harvey B. Meyer Vladimir Pascalutsa |
| author_sort | Julian Parrino |
| collection | DOAJ |
| description | Abstract In order to reach a precision of 0.2% on the hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon, (g – 2) μ , such that the full Standard-Model prediction matches in precision the direct experimental measurement, it is crucial to include the leading, O(α) electromagnetic corrections to HVP. In this work, we determine an important contribution to the latter from a diagram comprised of two two-point quark-loops, connected by the internal photon and gluons. This ultraviolet-finite correction is calculated from lattice QCD using a coordinate-space formalism, where photons are treated in the continuum and infinite volume. Our result amounts to a (−0.89 ± 0.18)% correction to the leading-order HVP contribution to (g – 2) μ . To overcome the worsening statistical noise at large distances, our analysis is combined with phenomenological models featuring light pseudoscalar mesons with masses below 1 GeV. In particular, our data show a very steep mass dependence as dictated by the charged pion loop. Similarly, the other diagrams appearing in the O(α)-corrections to the HVP with the internal photon connecting two separate quark loops are also ultraviolet-finite and can be computed with the same formalism. |
| format | Article |
| id | doaj-art-6a003b53f62d4a7c9dba81294bb491e8 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
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| series | Journal of High Energy Physics |
| spelling | doaj-art-6a003b53f62d4a7c9dba81294bb491e82025-08-20T04:01:47ZengSpringerOpenJournal of High Energy Physics1029-84792025-07-012025714710.1007/JHEP07(2025)201Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCDJulian Parrino0Volodymyr Biloshytskyi1En-Hung Chao2Harvey B. Meyer3Vladimir Pascalutsa4PRISMA+ Cluster of Excellence & Institut für Kernphysik, Johannes Gutenberg-Universität MainzInstitut für Kernphysik, Johannes Gutenberg-Universität MainzPhysics Department, Columbia UniversityPRISMA+ Cluster of Excellence & Institut für Kernphysik, Johannes Gutenberg-Universität MainzInstitut für Kernphysik, Johannes Gutenberg-Universität MainzAbstract In order to reach a precision of 0.2% on the hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon, (g – 2) μ , such that the full Standard-Model prediction matches in precision the direct experimental measurement, it is crucial to include the leading, O(α) electromagnetic corrections to HVP. In this work, we determine an important contribution to the latter from a diagram comprised of two two-point quark-loops, connected by the internal photon and gluons. This ultraviolet-finite correction is calculated from lattice QCD using a coordinate-space formalism, where photons are treated in the continuum and infinite volume. Our result amounts to a (−0.89 ± 0.18)% correction to the leading-order HVP contribution to (g – 2) μ . To overcome the worsening statistical noise at large distances, our analysis is combined with phenomenological models featuring light pseudoscalar mesons with masses below 1 GeV. In particular, our data show a very steep mass dependence as dictated by the charged pion loop. Similarly, the other diagrams appearing in the O(α)-corrections to the HVP with the internal photon connecting two separate quark loops are also ultraviolet-finite and can be computed with the same formalism.https://doi.org/10.1007/JHEP07(2025)201Lattice QCDEffective Field Theories of QCDStandard Model Parameters |
| spellingShingle | Julian Parrino Volodymyr Biloshytskyi En-Hung Chao Harvey B. Meyer Vladimir Pascalutsa Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCD Journal of High Energy Physics Lattice QCD Effective Field Theories of QCD Standard Model Parameters |
| title | Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCD |
| title_full | Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCD |
| title_fullStr | Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCD |
| title_full_unstemmed | Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCD |
| title_short | Computing the UV-finite electromagnetic corrections to the hadronic vacuum polarization in the muon (g − 2) from lattice QCD |
| title_sort | computing the uv finite electromagnetic corrections to the hadronic vacuum polarization in the muon g 2 from lattice qcd |
| topic | Lattice QCD Effective Field Theories of QCD Standard Model Parameters |
| url | https://doi.org/10.1007/JHEP07(2025)201 |
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