Cheshire Cat Hadrons

Abstract

This article is based on a series of lectures given at ELAF 93 on the description of low-energy hadronic systems {\it in and out} of hadronic medium. The focus is put on identifying, with the help of a Cheshire Cat philosophy, the effective degrees of freedom relevant for the strong interactions from a certain number of generic symmetry properties of QCD. The matters treated are the ground-state and excited-state properties of light- and heavy-quark baryons and applications to nuclei and nuclear matter under normal as well as extreme conditions.

Comments: (Lectures given at Latin American School of Physics 93 (ELAF '93), 5-16 July 1993, Mar del Plata, Argentina); LATEX, 151 pages (15 figures not included, available on request); SPhT T93/110; an updated version is available at arXiv:hep-ph/0206003