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Título:
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Precise determination of the f_o(500) and f_o(980) parameters in dispersive analysis of the ?? data
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Autores:
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Kami?ski, Robert ;
Garcia Martin, R. ;
Peláez Sagredo, José Ramón ;
Ruiz de Elvira, J.
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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, 2013-01
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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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Use of the new and precise dispersive equations with imposed crossing symmetry condition to solve the longstanding puzzle in the parameters of the f_o(500), as well as the f_o(980) is presented. This puzzle is finally being settled thanks to analyzes carried out during the last years [1]. In this report we show how our very recent dispersive data analysis allowed for a precise and model independent determination of the amplitudes for the S, P, D and F waves [2–4]. Especially we present that the analytic continuation of once subtracted dispersion relations for the S 0 wave to the complex energy plane leads to very precise results for the f_o(500) pole: ?S_ ¬(pole) = 457^(+14) _(?13) ? i279^(+11) _(?7) MeV and for the f_o(980) ?S_ ¬(pole) = 996 ± 7 ? i25^(+10)_(?6) MeV. We also mention on first (or one of the first) practical application of presented dispersion relations in refitting and in significant improving of the ?? S –wave amplitudes below 1000 MeV
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En línea:
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https://eprints.ucm.es/34595/1/pelaezsagredo09preprint.pdf
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