Improved Evaluation of the Electroweak Contribution to Muon g-2.

Authors

Martin Hoferichter, Jan Lüdtke, Luca Naterop, Massimiliano Procura, Peter Stoffer

Published in

Physical review letters. Volume 134. Issue 20. Pages 201801. May 23, 2025.

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}.

PMID:
40479659
Bibliographic data and abstract were imported from PubMed on 07 Jun 2025.

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