paper

Testing perturbation theory on the nf=0 static quark potential

arXiv:hep-ph/0109093 · doi:10.1016/S0370-2693(01)01298-9

Abstract

The perturbative expansion of static force and potential is reanalyzed concerning its practical applicability. A well behaved perturbative prediction is given by the integration of the renormalization group equation for the coupling . Since the Lambda-parameter of the $\nf=0$ theory is known from previous work, the perturbative prediction contains no free parameter. It is confronted with recent non-perturbative results. For where the truncation error of the perturbative expression is naively estimated to be moderate, it is really quite accurate and large ``non-perturbative terms'' are excluded.

Added comment on known alpha^4 log(alpha) term (page 8), References and acknowledgement

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