Where do perturbative and non-perturbative QCD meet?
classification
✦ hep-lat
keywords
latticeperturbationtheoryquarkactionsagreementalphabeta
read the original abstract
We computed the static potential and Wilson loops to $O(\alpha^2)$ in perturbation theory for different lattice quark and gluon actions. In general, we find short distance lattice data to be well described by ``boosted perturbation theory''. For Wilson-type fermions at present-day quark masses and lattice spacings agreement within 10% between measured ``$\beta$-shifts'' and those predicted by perturbation theory is found. We comment on prospects for a determination of the real world QCD running coupling.
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