Abstract
We report on very strong evidence of the occurrence of power terms in αs(p), the QCD running coupling constant in theMÕM scheme, by analyzing non-perturbative measurements from the lattice three-gluon vertex between 2.0 and 10.0 GeV at zero flavor. While putting forward the caveat that this definition of the coupling is a gauge dependent one, the general relevance of such an occurrence is discussed. We fit ΛMSbar(nf = 0) = 237±3 + 0−10 MeV in perfect agreement with the result obtained by the ALPHA group with a totally different method. The power correction to αs(p) is fitted to (0.63±0.03 + 0.0− 0.13) GeV2/p2.
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