Poles of light resonances from unitarized Chiral perturbation Theory and their large N_c behavior
We have recently completed the one loop calculation of meson-meson scattering within Chiral Perturbation Theory. Once unitarized, these amplitudes provide simultaneously a remarkable description of the resonance region up to 1.2 GeV as well as the low energy region, respecting the chiral symmetry ex...
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| Formato: | capítulo de livro |
| Fecha de publicación: | 2003 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/60961 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/60961 |
| Access Level: | acceso abierto |
| Palavra-chave: | 51-73 -scattering Multi-quark hadrons One-loop Kpi scattering Phase-shift Form-factors Sigma-model Meson Amplitude Lagrangians Física-Modelos matemáticos Física matemática |
| Resumo: | We have recently completed the one loop calculation of meson-meson scattering within Chiral Perturbation Theory. Once unitarized, these amplitudes provide simultaneously a remarkable description of the resonance region up to 1.2 GeV as well as the low energy region, respecting the chiral symmetry expansion. The position of the poles in these amplitudes is related to the mass and width of the associated resonances that are generated without being explicitly included in the Lagrangian. The spectroscopic nature of these states can then be deduced by studying the behavior of these poles, through the N_c dependence of the Chiral Perturbation Theory parameters, which can be obtained from QCD in the large N_c limit. |
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