Pion-Exchange Contributions to Two-Photon Amplitudes and the Nuclear Magnetic Susceptibility
- 8 March 1976
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 36 (10), 510-514
- https://doi.org/10.1103/physrevlett.36.510
Abstract
The pion-exchange contributions to the two-photon amplitude are derived and gauge invariance of the complete amplitude is shown. A low-energy theorem for a general two-photon process is derived and the pionic contribution to the magnetic susceptibility is calculated. The contribution of this quantity to two-photon radiative capture is shown to be small.
Keywords
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