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Título:
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A non-perturbative chiral approach for meson-meson interactions
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Autores:
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Oller, J. A. ;
Oset, E. ;
Guerrero, F. ;
Peláez Sagredo, José Ramón
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science BV, 2000-01-31
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física-Modelos matemáticos
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Materia = Ciencias: Física: Física matemática
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Tipo = Artículo
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Resumen:
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A non-perturbative method [1] which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe meson-meson interactions up to ?s<_ gev extending in this way the range of applicability information contained chiral perturbation theory pt since perturbative series is typically restricted to mev. approach uses o and lagrangians. seven free parameters resulting from lagrangian are fitted experimental data. makes use expansion t instead amplitude itself as done x pt. former suggested by analogy with effective approximation quantum mechanics it appears be very useful. results fact good agreement a vast amount analyses>
The amplitudes develop poles corresponding to the f?(980), a?(980), ?(770), K*(890), the octet contribution to the ? , f?(400 ?1200) ? ? and ? [4]. The total and partial decay widths of the resonances are also well reproduced.
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En línea:
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https://eprints.ucm.es/35650/1/pelaezsagredo103preprint.pdf
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