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Leading SU(3)-breaking corrections to the baryon magnetic moments in chiral perturbation theory

Geng, L S ; Camalich, J Martin ; Alvarez-Ruso, L ; Vacas, M J Vicente

Physical review letters, 2008-11, Vol.101 (22), p.222002-222002, Article 222002 [Periódico revisado por pares]

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Título:
Leading SU(3)-breaking corrections to the baryon magnetic moments in chiral perturbation theory
Autor: Geng, L S ; Camalich, J Martin ; Alvarez-Ruso, L ; Vacas, M J Vicente
Assuntos: BARYONS ; CHIRALITY ; CORRECTIONS ; MAGNETIC MOMENTS ; MASS ; PERTURBATION THEORY ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; RENORMALIZATION ; SU-3 GROUPS ; SYMMETRY BREAKING
É parte de: Physical review letters, 2008-11, Vol.101 (22), p.222002-222002, Article 222002
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: 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.
Editor: United States
Idioma: Inglês

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