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The Operator Product Expansion, Nonperturbative Couplings and the Landau Pole: Lessons from the $O(N)\sigma$ Model
We obtain the operator product expansion of the self-energy in the O(N) non-linear $\sigma$-model to all orders in the coupling and the large momentum, and to next-to-leading order in 1/N. In the light of this result we discuss recent suggestions that there may be additional power corrections from s...
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
1998
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0370-2693(98)01339-2 http://cds.cern.ch/record/364217 |