Hadronic light-by-light scattering contribution to the muon g-2: an effective field theory approach

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dc.creatorKnecht, M.
dc.creatorNyffeler, A.
dc.creatorPerrottet, M.
dc.creatorde Rafael, E.
dc.date2001-11-06
dc.date2002-02-18
dc.date.accessioned2026-07-07T11:47:29Z
dc.date.available2026-07-07T11:47:29Z
dc.descriptionThe hadronic light-by-light contribution to a_{mu}, the anomalous magnetic moment of the muon, is discussed from the point of view of an effective low-energy theory. As an application, the coefficient of the leading logarithm arising from the two-loop graphs involving two anomalous vertices is computed, and found to be positive. This corresponds to a positive sign for the pion-pole contribution to the hadronic light-by-light correction to a_{mu}, and to a sizeable reduction of the discrepancy between the present experimental value of a_{mu} and its theoretical counterpart in the standard model.
dc.description4 pages, 1 figure. v2: published version
dc.identifierhttps://arxiv.org/abs/hep-ph/0111059
dc.identifierhttp://arxiv.org/abs/hep-ph/0111059
dc.identifierPhys.Rev.Lett.88:071802,2002
dc.identifierdoi:10.1103/PhysRevLett.88.071802
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202589
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleHadronic light-by-light scattering contribution to the muon g-2: an effective field theory approach
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