Work

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

Year: 2026

Type: article

Abstract: 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 ( α s ) correction, which significantly reduces the residual renormalization-scale dependence and the perturbative uncertainty. Our final result is a μ HLbLc = 3.65 ( 25 ) × 10 − 11 , in good agreement with recent lattice determinations.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2026.140178

Authors: Johan Bijnens, Nils Hermansson-Truedsson, Antonio Rodríguez-Sánchez

Institutions: Lund University, University of Edinburgh, University of Castilla-La Mancha

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Science and Technology Facilities Council, Agencia Estatal de Investigación

Awards: G34346518, G4214789025, Hadrons as a Portal to New Physics