QCD Box Graphs and the Quark-Antiquark Potential

Abstract

The $t\bar{t}$ system allows a truly perturbative treatment of the potential. Completing previous computations, we calculate the contributions of QCD box graph corrections, which make the ``relativistic'' $O({\text{a}}^4)$ corrections in the non-Abelian case differ from the well known corrections of the same order in QED.

Comments: 10 pages, 2 Postscript figures