The non-perturbative QCD potential

Abstract

The potential between heavy quarks can be rigorously defined in a QCD effective field theories framework. I discuss the general situation when the coupling constant may not be considered small and provide an explicit expression for the potential valid up to order 1/m^2. Spin dependent and spin independent terms are expressed in terms of Wilson loops, completing an ideal journey started twenty years ago with the classical work of Eichten and Feinberg.

Comments: 8 pages, 1 figure, espcrc2.sty. Invited talk given at QCD00, 6-13 July, Montpellier, France and at the XIII International Workshop on the Fundamental Problems of High Energy Physics and Field Theory, 21-23 June, Protvino, Russia. To be published in Nucl. Phys. Proc. Suppl