1. Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud, 150, 22290, Rio de Janeiro, RJ, Brasil 2. Instituto de Física, Universidade Federal do Rio de Janeiro, Cidade Universitária, 21190, Ilha do Fund?o, RJ, Brasil
Abstract:
We give a naïve perturbative proof of the existence of infrared renormalons for large distance asymptotically free theories. We argue that the extension of the result for small distance asymptotically free theories is not obvious. Indeed we do not find infrared renormalons for QCD.