The running QCD coupling in the pre-asymptotic region
G. Burgio, F. Di Renzo, C. Parrinello, C. Pittori
Abstract
We study deviations from the perturbative asymptotic behaviour in the running QCD coupling by analysing non-perturbative measurements of alphas (p) at low momenta as obtained from the lattice three-gluon vertex. Our exploratory study provides some evidence for power corrections to the perturbative running proportional to 1/p2.
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