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arXiv · 0805.1419

Leading SU(3)-breaking corrections to the baryon magnetic moments in Chiral Perturbation Theory

L. S. Geng·J. Martin Camalich·L. Alvarez-Ruso·M. J. Vicente Vacas
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Abstract

We calculate the baryon magnetic moments using covariant Chiral Perturbation Theory ($χ$PT) within the Extended-on-mass-shell (EOMS) renormalization scheme. By fitting the two available low-energy constants (LECs), we improve the Coleman-Glashow description of the data when we include the leading SU(3) breaking effects coming from the lowest-order loops. This success is in dramatic contrast with previous attempts at the same order using Heavy Baryon (HB) $χ$PT and covariant Infrared (IR) $χ$PT. We also analyze the source of this improvement with particular attention on the comparison between the covariant results.

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L. S. Geng, J. Martin Camalich, L. Alvarez-Ruso, M. J. Vicente Vacas. 2008-11-17. Leading SU(3)-breaking corrections to the baryon magnetic moments in Chiral Perturbation Theory. https://doi.org/10.1103/physrevlett.101.222002

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