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The validity of perturbation theory for the O(N) non-linear sigma models
Recently it has been claimed that ordinary perturbation theory (OPT) gives incorrect weak coupling expansions for lattice O(N) non-linear sigma models in the infinite volume limit, and in particular that the two-dimensional non-abelian models are not asymptotically free, contrary to previous finding...
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| Lenguaje: | eng |
| Publicado: |
1986
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| Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(86)90241-8 http://cds.cern.ch/record/167294 |