Testing fixed points in the 2D O(3) non-linear sigma model
  Using high statistic numerical results we investigate the properties of the O(3) non-linear 2D sigma-model. Our main concern is the detection of an hypothetical Kosterlitz-Thouless-like (KT) phase transition which would contradict the asymptotic freedom scenario. Our results do not support such a KT-like phase transition. 
B. Alles (Milano), G. Cella (Pisa), M. Dilaver (Ankara), Y. Gunduc   (Ankara)