Hadronic light-by-light scattering contribution to the muon anomalous magnetic moment from lattice QCD
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The form factor that yields the light-by-light scattering contribution to the muon anomalous magnetic moment is computed in lattice QCD+QED and QED. A non-perturbative treatment of QED is used and is checked against perturbation theory. The hadronic contribution is calculated for unphysical quark and muon masses, and only the diagram with a single quark loop is computed. Statistically significant signals are obtained. Initial results appear promising, and the prospect for a complete calculation with physical masses and controlled errors is discussed.
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Forward citations
Cited by 3 Pith papers
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Hadronic light-by-light contribution to the muon anomalous magnetic moment from lattice QCD
Preliminary lattice QCD result for hadronic light-by-light contribution to muon g-2 is (7.41 ± 6.33) × 10^{-10}.
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The paper provides an overview of theoretical calculations for lepton anomalous magnetic moments arising from quantum corrections in the Standard Model.
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The Standard Model value for the muon anomalous magnetic moment is 116591810(43)×10^{-11}, 3.7σ below the Brookhaven experimental measurement.
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