Generalized polarizabilities and the spin-averaged amplitude in virtual Compton scattering off the nucleon
- Institut fuer Kernphysik, Johannes Gutenberg-Universitaet, J. J. Becher-Weg 45, D-55099 Mainz (Germany)
We discuss the low-energy behavior of the spin-averaged amplitude of virtual Compton scattering 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. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 435279
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 55; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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