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

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  • 6 November 2001
Abstract
The 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. Implications for the sign of the pion-pole contribution to the hadronic light-by-light correction to a_{mu} are discussed.

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