Improved Evaluation of the Electroweak Contribution to Muon g−2

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Abstract
A precise evaluation of the electroweak contribution to the anomalous magnetic moment of the muon requires control over all aspects of the standard model, ranging from Higgs physics, over multiloop computations for bosonic and (heavy-)fermion diagrams, to nonperturbative effects in the presence of light quarks. Currently, the dominant uncertainties arise from such hadronic effects in the vector–vector–axial-vector three-point function, an improved understanding of which has recently emerged in the context of hadronic light-by-light scattering. Profiting from these developments as well as new perturbative and nonperturbative input for the charm contribution, we obtain a μ EW = 154.4 ( 4 ) × 10 − 11 . Published by the American Physical Society 2025
Funding Information
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (TMCG-2_213690, PCEFP2_194272)
  • Austrian Science Fund (I 3845-N27)
  • Kavli Institute for Theoretical Physics, University of California, Santa Barbara (NSF PHY-2309135)
  • Doctoral Program Particles and Interactions (W1252-N27)

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