K. Orginos, W. Bietenholz, R. Brower, S. Chandrasekharan and U.-J. Wiese, THE PERFECT QUARK GLUON VERTEX FUNCTION,
Nucl. Phys. B (Proc. Suppl.), vol. 63
(1998),
pp. 904-906 .
Abstract: We evaluate a perfect quark-gluon vertex function for QCD in
coordinate space and truncate it to a short range. We
present preliminary results for the charmonium spectrum
using this quasi-perfect action.