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Hadronic Light-By-Light Scattering Contribution to the Muong−2: An Effective Field Theory Approach
Open accessAbstract
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. This corresponds to a positive sign for the pion-pole contribution to the hadronic light-by-light correction to a(mu), and to a sizable reduction of the discrepancy between the present experimental value of a(mu) and its theoretical counterpart in the standard model.
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Citations
Cites
A PCAC puzzle: π0→γγ in the σ-model
Bell, J. S., & Jackiw, R. (1969) · Il Nuovo Cimento A · doi:10.1007/bf02823296 · Cited by 3,284
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R-Parity-violating supersymmetry
Barbier, R., Bérat, C., Besançon, M., Chemtob, M., Deandrea, A., Dudas, E., Fayet, P., Lavignac, S., Moreau, G., Perez, E., et al. (2005) · Physics Reports · doi:10.1016/j.physrep.2005.08.006 · Cited by 1,043
Gilberto Colangelo, A., Hagelstein, F., Hoferichter, M., Laub, L., & Stoffer, P. (2020) · doi:10.1007/jhep03%282020%29101 · Cited by 322
Colangelo, G., Hagelstein, F., Hoferichter, M., Laub, L., & Stoffer, P. (2020) · Journal of High Energy Physics · doi:10.1007/jhep03(2020)101 · Cited by 303
Metadata
- Authors
- Knecht, M., Nyffeler, A., Perrottet, M., & de Rafael, E.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2002-01-31
- Volume
- 88
- Issue
- 7
- Pages
- 071802-071802
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2085240586
- Cited by
- 239
- References
- 1
- FWCI
- 21.07
- Type
- journal article
- Language
- en
- Open access
- green
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- Knecht, M., Nyffeler, A., Perrottet, M., & de Rafael, E. (2002). Hadronic Light-By-Light Scattering Contribution to the Muong−2: An Effective Field Theory Approach. Physical Review Letters. https://doi.org/10.1103/physrevlett.88.071802
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