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Johan Bijnens in front of his whiteboard

Johan Bijnens

Professor, Deputy Head of Division

Johan Bijnens in front of his whiteboard

On the charm contribution to the muon g - 2 light-by-light

Author

  • Johan Bijnens
  • Nils Hermansson-Truedsson
  • Antonio Rodríguez-Sánchez

Summary, in English

We combine existing perturbative results to show that a precise analytic determination of the charm-quark contribution to the hadronic light-by-light (HLbL) part of the muon anomalous magnetic moment is possible. Working in the MS‾ scheme, we include the NLO O(αs) correction, which significantly reduces the residual renormalization-scale dependence and the perturbative uncertainty. Our final result is aμHLbLc=3.65(25)×10−11, in good agreement with recent lattice determinations.

Department/s

  • Particle and nuclear physics

Publishing year

2026-02

Language

English

Publication/Series

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

873

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Keywords

  • Charm quark
  • Hadronic light-by-light scattering
  • Muon anomalous magnetic moment
  • Perturbative QCD

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693