Spectroscopy without quarks: A Skyrme-model sampler

A potpourri of Skyrme-model results for the meson-baryon system is surveyed. This talk is devoted to a study of meson-nucleon scattering in skyrmion models of the nucleon. [l”’ We shall focu s o n the characteristic energy-range of the baryon resonances, typically 1.5-2.5 GeV. This is well beyond the point where the chiral Lagrangians are conventionally applied; nor is it known at present how to apply QCD directly in this domain. Thus it is especially interesting to see what insights emerge in this regime from skyrmion physics. The results presented here will only be valid to leading order in l/N,, where Ne is the number of colors of the underlying gauge theory.“’ The object of our investigations will be effective Lagrangians (Skyrme’s included)