The Role of the QCD Vacuum in the Heavy-Quark Bound State Dynamics

Abstract

The effective field theory approach allows a rigorous disentangling of high and low energy effects in the heavy quarkonium dynamics. Focusing in particular on the spectrum, we describe the nature of the non-perturbative effects and discuss our present knowledge of them.

Comments: Invited talk presented at the Fifth Workshop on Quantum Chromodynamics, Villefranche-sur-Mer, France, 3-7 January 2000; 9 pages, sprocl.sty