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On the large-N$_{c}$ behaviour of the L$_{7}$ coupling in $\chi$PT
It is shown that the usual large-N_c counting of the coupling constant L_{7} of the {\cal O}(p^4) low-energy chiral SU(3) Lagrangian \cite{GL85} is in conflict with general properties of QCD in the large-N_c limit. The solution of this conflict within the framework of a chiral U(3) Lagrangian is exp...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1994
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(95)00160-M http://cds.cern.ch/record/274273 |