Chiral dynamics of rare eta decays and virtual Compton scattering off the nucleon

Abstract

Two different topics relevant for DA$\hat{I}¦$NE and CEBAF, respectively, are covered. First we analyze the rare radiative eta decay mode $\hat{I}\cdot \to \ddot{I}€\ddot{I}€{\hat{I}}^3{\hat{I}}^3$ within the framework of chiral perturbation theory at $\mathcal{O}(p^4)$. We then discuss virtual Compton scattering off the nucleon at low energies. Predictions for the two spin-independent generalized polarizabilities are shown.

5 pages, 3 postscript figures, Revtex using epsf, invited talk given at the workshop DAPHCE96, Frascati, November 1996, to appear in the proceedings (Nucl. Phys. A)