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Título: | Properties of hyperons in chiral perturbation theory |
Autor: | Vicente Vacas, Manuel J. CSIC ORCID; Geng, Li Sheng; Martín Cámalich, Jorge CSIC ORCID; Álvarez Ruso, Luis CSIC ORCID | Palabras clave: | Chiral perturbation theory Hyperon phenomenology |
Fecha de publicación: | 1-abr-2010 | Editor: | Elsevier | Citación: | Nuclear Physics - Section A 835 (1-4): 337-341 (2010) | Resumen: | The development of chiral perturbation theory in hyperon phenomenology has been troubled due to power-counting subtleties and to a possible slow convergence. Furthermore, the presence of baryon-resonances, e.g. the lowest-lying decuplet, complicates the approach, and the inclusion of their effects may become necessary. Recently, we have shown that a fairly good convergence is possible using a renormalization prescription of the loop-divergencies which recovers the power counting, is covariant and consistent with analyticity. Moreover, we have systematically incorporated the decuplet resonances taking care of both power-counting and consistency problems. A model-independent understanding of diferent properties including the magnetic moments of the baryon-octet, the electromagnetic structure of the decuplet resonances and the hyperon vector coupling f(1) (0), has been successfully achieved within this approach. We will briefly review these developments and stress the important role they play for an accurate determination of the Cabibbo-Kobayashi-Maskawa matrix element V-us hyperon semileptonic decay data. | Descripción: | 10th International Conference on Hypernuclear and Strange Particle Physics. Tokai, JAPAN, SEP 14-18, 2009 | Versión del editor: | http://dx.doi.org/ 10.1016/j.nuclphysa.2010.01.213 | URI: | http://hdl.handle.net/10261/24190 | DOI: | 10.1016/j.nuclphysa.2010.01.213 | ISSN: | 0375-9474 |
Aparece en las colecciones: | (IFIC) Comunicaciones congresos |
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Properties of hyperons.pdf | 59,57 kB | Adobe PDF | Visualizar/Abrir |
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