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Lattice QCD calculation of hadronic light-by-light scattering

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arxiv 1507.01577 v1 pith:W544PNFG submitted 2015-07-06 hep-lat hep-ph

Jeremy Green , Oleksii Gryniuk , Georg von Hippel , Harvey B. Meyer , Vladimir Pascalutsa This is my paper · ORCID
classification hep-lathep-ph
keywords hadroniclight-by-lightscatteringcalculationcontributionlatticepionrange
verification ladder T0 review T1 audit T2 compute T3 formal

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We perform a lattice QCD calculation of the hadronic light-by-light scattering amplitude in a broad kinematical range. At forward kinematics, the results are compared to a phenomenological analysis based on dispersive sum rules for light-by-light scattering. The size of the pion pole contribution is investigated for momenta of typical hadronic size. The presented numerical methods can be used to compute the hadronic light-by-light contribution to the anomalous magnetic moment of the muon. Our calculations are carried out in two-flavor QCD with the pion mass in the range of 270 to 450MeV, and contain so far only the diagrams with fully connected quark lines.

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  1. Hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon at the physical pion mass

    hep-lat 2024-11 conditional novelty 6.0 of 10

    A lattice QCD calculation at the physical pion mass with staggered quarks yields a_mu^hlbl = 125.5(11.6)(0.4) x 10^-11, consistent with previous lattice and dispersive determinations.

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