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Título: | Leading-order decuplet contributions to the baryon magnetic moments in chiral perturbation theory |
Autor: | Geng, Li Sheng; Martín Cámalich, Jorge CSIC ORCID; Vicente Vacas, Manuel J. CSIC ORCID | Fecha de publicación: | 24-abr-2009 | Editor: | Elsevier | Citación: | Phys.Lett.B676:63-68,2009 | Resumen: | We extend an earlier study of the baryon magnetic moments in chiral perturbation theory by the explicit inclusion of the spin-3/2 decuplet resonances. We find that the corrections induced by these heavier degrees of freedom are relatively small in a covariant framework where unphysical spin-1/2 modes are removed. Consequently, implementing the leading SU(3)-breaking corrections given by both the baryon and decuplet contributions, we obtain a description of the baryon-octet magnetic moments that is better than the Coleman-Glashow relations. Finally, we discuss the uncertainties and compare between heavy baryon and covariant approaches. (C) 2009 Elsevier B.V. All rights reserved. | Versión del editor: | hhtp://dx.doi.org/10.1016/j.physletb.2009.04.061 | URI: | http://hdl.handle.net/10261/15873 | DOI: | 10.1016/j.physletb.2009.04.061 | ISSN: | 0370-2693 |
Aparece en las colecciones: | (IFIC) Artículos |
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