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https://hdl.handle.net/2445/20991
Título: | s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry |
Autor: | García-Recio, C. Magas, Volodymyr Mizutani, Tetsuro Nieves, J. Ramos Gómez, Àngels Salcedo, L. L. Tolós Rigueiro, Laura |
Materia: | Partícules (Física nuclear) Teoria de camps (Física) Particles (Nuclear physics) Field theory (Physics) |
Fecha de publicación: | 2009 |
Publicado por: | The American Physical Society |
Resumen: | We study charmed baryon resonances that are generated dynamically within a unitary meson-baryon coupled-channel model that treats the heavy pseudoscalar and vector mesons on equal footing as required by heavy-quark symmetry. It is an extension of recent SU(4) models with t-channel vector-meson exchanges to an SU(8) spin-flavor scheme, but differs considerably from the SU(4) approach in how the strong breaking of the flavor symmetry is implemented. Some of our dynamically generated states can be readily assigned to recently observed baryon resonances, while others do not have a straightforward identification and require the compilation of more data as well as an extension of the model to d-wave meson-baryon interactions and p-wave coupling in the neglected s- and u-channel diagrams. Of several novelties, we find that the Delta c(2595), which emerged as a ND quasibound state within the SU(4) approaches, becomes predominantly a ND* quasibound state in the present SU(8) scheme. |
Nota: | Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevD.79.054004 |
Es parte de: | Physical Review D, 2009, vol. 79, núm. 5, p. 054004-1-054004-24 |
URI: | https://hdl.handle.net/2445/20991 |
Recurso relacionado: | http://dx.doi.org/10.1103/PhysRevD.79.054004 |
ISSN: | 0556-2821 |
Aparece en las colecciones: | Articles publicats en revistes (Física Quàntica i Astrofísica) Publicacions de projectes de recerca finançats per la UE |
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