We discuss the hadronic light-by-light scattering contribution to the muon anomalous magnetic moment, aμ=(gμ-2)/2, paying particular attention to the consistent matching of the short- and long-distance behaviors of the light-by-light scattering amplitude. Accounting for the short-distance constraints leads to an approximately 50% increase in the central value of aμLbL compared with existing estimates.
|Original language||English (US)|
|Number of pages||9|
|Journal||Progress in Particle and Nuclear Physics|
|State||Published - Jul 2005|
|Event||International School of Nuclear Physics 26th Course Lepton Scattering and the Structure of Hadrons and Nuclei - |
Duration: Sep 16 2004 → Sep 24 2004
Bibliographical noteFunding Information:
I am grateful to A. Czarnecki, W.J. Marciano and K. Melnikov for collaboration. This work was supported in part by DOE grant DE-FG02-94ER408.
- Anomalous magnetic moment
- Operator Product Expansion