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Leading-order decuplet contributions to the baryon magnetic moments in chiral perturbation theory

AuthorsGeng, Li Sheng; Martín Cámalich, Jorge ; Vicente Vacas, Manuel J.
Issue Date24-Apr-2009
AbstractWe 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.
Publisher version (URL)hhtp://dx.doi.org/10.1016/j.physletb.2009.04.061
Appears in Collections:(IFIC) Artículos
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