Quarkonium in the Wilson loop formalism: new perspectives

Abstract

We review the present knowledge on the heavy quark interaction. The framework is the NRQCD effective theory and the interaction is expressed in terms of Wilson loop chromoelectric and chromomagnetic insertions.

Comments: Plenary talk presented at ``Particle and Nuclear physics with CEBAF at Jefferson Lab'', Dubrovnik, November 3-10, 1998; 10 pages, latex file