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Observables in Unpolarized and Polarized Virtual Compton Scattering

A. Metz, B. Pasquini, D. Drechsel

hep-pharXiv:hep-ph/9808282

Abstract

Below pion threshold virtual Compton scattering off the nucleon gives access to the generalized electromagnetic polarizabilities. Different theoretical results for the generalized polarizabilities have been compared. In particular, the influence of the generalized polarizabilities on the unpolarized cross section and on double polarization observables has been investigated. Predictions for these observables have been obtained in the linear sigma model and chiral perturbation theory.

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