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Título:
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Precise determination of the f(0)(600) and f(0)(980) pole parameters from a dispersive data analysis
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Autores:
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Garcia-Martin, R ;
Kami?ski, Robert ;
Peláez Sagredo, José Ramón ;
Ruiz de Elvira, Jacobo
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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, 2011-08-09
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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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We use our latest dispersive analysis of ? ? scattering data and the very recent K_(l4) experimental results to obtain the mass, width, and couplings of the two lightest scalar-isoscalar resonances. These parameters are defined from their associated poles in the complex plane. The analytic continuation to the complex plane is made in a model-independent way by means of once-and twice-subtracted dispersion relations for the partial waves, without any other theoretical assumption. We find the f(0)(600) pole at [457_(-13)^(+14)] – i[279_(-7)^(+11)+ MeV and that of the f(0)(980) at (996 ± 7) – i[25_(-6)^(+10)] MeV, whereas their respective couplings to two pions are 3.59_(-0.13)^(+0.11) and 2.3 ± 0.2 GeV.
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En línea:
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https://eprints.ucm.es/35004/1/pelaezsagredo12libre.pdf
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