title: Leading SU(3)-breaking corrections to the baryon magnetic moments in chiral perturbation theory.
abstract: We calculate the baryon magnetic moments using covariant chiral perturbation theory (chiPT) within the extended-on-mass-shell renormalization scheme. By fitting the two available low-energy constants, 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 chiPT and covariant infrared chiPT. We also analyze the source of this improvement with particular attention to the comparison between the covariant results.
authors.affiliation: Departamento de Física Teórica and IFIC, Universidad de Valencia-CSIC, E-46071 Valencia, Spain.
authors.forename: L S
authors.initials: LS
authors.lastname: Geng
authors.forename: J Martin
authors.initials: JM
authors.lastname: Camalich
authors.forename: L
authors.initials: L
authors.lastname: Alvarez-Ruso
authors.forename: M J Vicente
authors.initials: MJ
authors.lastname: Vacas