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

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.

13 pages, 1 postscript figure, Revtex using epsf

References in corpus (2)

• Virtual Compton Scattering and Generalized Polarizabilities of the Proton
• Virtual Compton scattering off the nucleon at low energies

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