Generalized polarizabilities and the spin-averaged amplitude in virtual Compton scattering off the nucleon
- 1 January 1997
- journal article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 55 (1), 424-430
- https://doi.org/10.1103/physrevc.55.424
Abstract
We discuss the low-energy behavior of the spin-averaged amplitude of virtual Compton scattering (VCS) off a nucleon. Based on gauge invariance, Lorentz invariance and the discrete symmetries, it is shown that to first order in the frequency of the final real photon only two generalized polarizabilities appear. Different low-energy expansion schemes are discussed and put into perspective.Comment: 13 pages, 1 postscript figure, Revtex using epsKeywords
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