Non-perturbative structure of the nucleon

Abstract

Chiral perturbation theory is the effective field theory of the standard model. In this talk, I discuss some applications of this framework to the pion--nucleon system. These are chiral corrections to the S--wave pion--nucleon scattering lengths, the reaction $\pi N\to \pi \pi N$ at threshold and low--energy theorems in ${\pi }^0$ photoproduction.

Comments: 6 pages, LaTeX, uses menu95.sty (appended), plenary talk, Sixth International Symposium on ``Meson-Nucleon Physics and the Structure of the Nucleon'', Blaubeuren/Tuebingen, Germany, July 10-14, 1995, to be published in the $\pi N$ Newsletter