Search for Lambda^2/p^2 corrections to the QCD running coupling
  We investigate the occurrence of power terms $(Lambda^2/p^2$ in the running QCD coupling by analysing non-perturbative measurements of $\alpha_s(p)$ at quite low momenta obtained from the lattice three-gluon vertex. Our study provides some evidence for such a contribution. The phenomenological implications of such a presence are reviewed. 
G. Burgio, F. Di Renzo, C. Parrinello and C. Pittori