QCD Power Corrections from a Simple Model for the Running Coupling
arXiv:hep-ph/9805484 · doi:10.1088/1126-6708/1998/10/012
Abstract
A simple parametrization of the QCD running coupling at low scales is introduced and used to illustrate various schemes for the estimation of non-perturbative power corrections. The `infrared matching' scheme proposed earlier gives satisfactory results when combined with next-to-leading (or higher) order perturbative predictions. Estimates based on renormalons are shown to be inconsistent with universal behaviour of the running coupling.
11 pages, latex, 5 postscript figures, uses JHEP.cls