arXiv:hep-ph/9808258·v2·High Energy Physics — Phenomenology
Search for 1/p^2 Corrections to the Running QCD Coupling
G. Burgio🇮🇹 · F. Di Renzo (UKQCD Collaboration)🇬🇧 · C. Parrinello (UKQCD Collaboration)🇬🇧 · C. Pittori🇧🇪
Abstract
We investigate the occurrence of power terms in the running QCD coupling by analysing non-perturbative measurements of alpha_s (p) at low momenta obtained from the lattice three-gluon vertex. Our exploratory study provides some evidence for power contributions to alpha_s (p) proportional to 1/p^2. Possible implications for physical observables are discussed.
Comments: 16 pages, 2 Postscript figures, uses epsfig.sty and amssymb.sty. Slight changes to the abstract and substantial enlargement of the Conclusions section