Hyperon magnetic moments and the 1/sup - -/. -->. 0/sup - +/+. gamma. decays

Journal Article · Sun Feb 01 04:00:00 EST 1981 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.23.787· OSTI ID:6595948

Oneda, S; Tanuma, T; Toiya, T; Slaughter, M D

Recent precision measurements of hyperon magnetic moments reveal that the moments of the ..lambda.., ..sigma../sup +/, and ..xi../sup 0/ are significantly smaller than the values predicted by the Coleman-Glashow formula or by the naive quark model. In the theoretical framework of SU(3) charge-current equal-time commutation relations and asymptotic SU(3) symmetry, the spin-nonflip sum rules imply that the usual SU(3) parametrization should apply not for the hyperon magnetic moments but for the product (anomalous magnetic moment) x (hyperon mass). Thus, the gross features of the observed hyperon magnetic moments are explained in terms of these derived mass-scale factors. The consistency of the spin-nonflip and -flip sum rules also implies that the remaining discrepancies should be attributed to the SU(3) mixings between the hyperons and their higher-lying excited 1/2/sup +/ states. In the same theoretical framework, the status of the similar magnetic-moment interactions, 1/sup - -/..-->.. 0/sup - +/+..gamma.., is also reviewed, by studying the consistency of the asymptotic SU(3) sum rules. It is concluded that the usual consideration of the related SU(3) mixing, especially the ones involving the eta and eta', is insufficient.

• Research Organization: Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6595948
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 23:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BAG MODEL
BARYONS
COMPOSITE MODELS
DECAY
ELECTROMAGNETIC PARTICLE DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
EQUATIONS
EXTENDED PARTICLE MODEL
FERMIONS
GAMMA SPECTRA
HADRONS
HYPERONS
LIE GROUPS
MAGNETIC MOMENTS
MATHEMATICAL MODELS
MATRIX ELEMENTS
PARITY
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
QUARK MODEL
RADIATIVE DECAY
SPECTRA
SPIN
SPIN FLIP
STRANGE PARTICLES
SU GROUPS
SU-3 GROUPS
SUM RULES
SYMMETRY BREAKING
SYMMETRY GROUPS
WEAK PARTICLE DECAY