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Título:
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Quark-mass dependence of the ? and ? mesons from dispersion relations and chiral perturbation theory
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Autores:
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Hanhart, Christoph ;
Peláez Sagredo, José Ramón ;
Rios, G.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2008-03
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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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We use the one-loop chiral perturbation theory ? ? -scattering amplitude and dispersion theory in the form of the inverse amplitude method to study the quark-mass dependence of the two lightest resonances of the strong interactions, the f_0(600) (?) and the ? meson. As the main results, we find that the rho ? ? coupling constant is almost quark mass independent and that the ? mass shows a smooth quark-mass dependence while that of the ? shows a strong nonanalyticity. These findings are important for studies of the meson spectrum on the lattice.
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En línea:
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https://eprints.ucm.es/35222/1/pelaezsagredo40libre.pdf
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