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Anomalous processes at high temperature and density in a 2-dimensional linear $\sigma$ model
We use the 2-dimensional $\sigma$ model as a toy model to study the behaviorof anomalous amplitudes in the limit where the constituent quark mass is small.Symmetry arguments tell that the $\pi^o\to\gamma$ amplitude should vanish if$m\to 0$, but we show that this conclusion is spoiled by infraredsing...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.63.016001 http://cds.cern.ch/record/428562 |