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Título:
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Chiral perturbation theory, the 1/N_c expansion and Regge behavior determine the structure of the lightest scalar meson
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Autores:
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Peláez Sagredo, José Ramón ;
Pennington, M. R. ;
Ruiz de Elvira, Jacobo ;
Wilson, D. J.
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Tipo de documento:
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texto impreso
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Editorial:
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Amer Physical Soc, 2011-11-09
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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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The leading 1=N_c behavior of unitarized chiral perturbation theory distinguishes the nature of the ? and the : The is a qq? meson, while the ? is not. However, semilocal duality between resonances and Regge behavior cannot be satisfied for larger N_c, if such a distinction holds. While the ? at N_c = 3 is inevitably dominated by its di-pion component, unitarized chiral perturbation theory also suggests that as N_c increases above 6–8, the ? may have a subdominant qq? fraction up at 1.2 GeV. Remarkably this ensures semilocal duality is fulfilled for the range of Nc ? 15–30, where the unitarization procedure adopted applies.
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En línea:
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https://eprints.ucm.es/34656/1/pelaezsagredo10libre.pdf
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