Generalized polarizabilities and the spin-averaged amplitude in virtual Compton scattering off the nucleon

Details Generalized polarizabilities and the spin-averaged amplitude in virtual Compton scattering off the nucleon Generalized polarizabilities and the spin-averaged amplitude in virtual Compton scattering off the nucleon

1996-08-28

arxiv.org/abs/nucl-th/9608061v1

Phys.Rev.C55:424-430,1997

Physics

Nuclear Physics

Nuclear Theory

13 pages, 1 postscript figure, Revtex using epsf

Scientific paper

10.1103/PhysRevC.55.424

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.

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