Physical Origin of Chiral States and Near-Threshold Resonances Observed at BES

Abstract

The purpose of my talk is to explain physical backgrounds of the chiral states, which are predicted to exist generally in the low mass regions of hadrons, containing light quarks, and to stimulate the experimental and phenomenological search for their candidates. The contents are organized as follows: section 1. Present Status of Hadron Spectroscopy, section 2. Some Basic Consideration on Quark Confinement, section 3. Essentials of Description of Composite Hadron in U~(12)-Scheme, section 4. Revisal of Meson and Baryon Wave Functions and Chiral States, section 5. Multi-Quark Hadrons and Near-Threshold Resonances, section 6. Concluding Remarks