Testing perturbation theory on the nf=0 static quark potential

Details Testing perturbation theory on the nf=0 static quark potential Testing perturbation theory on the nf=0 static quark potential

2001-09-11

arxiv.org/abs/hep-ph/0109093v2

Phys.Lett. B523 (2001) 135-142

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/S0370-2693(01)01298-9

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 $\alpha_{qq}(\mu=1/r)=(C_f)^{-1} r^2 F(r)$. 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 $\alpha < 0.3$ 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.

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