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The exact mass-gaps of the principal chiral models
An exact expression for the mass-gap, the ratio of the physical particle mass to the $\Lambda$-parameter, is found for the principal chiral sigma models associated to all the classical Lie algebras. The calculation is based on a comparison of the free-energy in the presence of a source coupling to a...
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| Lenguaje: | eng |
| Publicado: |
1994
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| Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(94)91089-8 http://cds.cern.ch/record/259075 |