Implications of baryon magnetic moments for the quark model

Journal Article · Mon Oct 01 00:00:00 EDT 1979 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.20.1742· OSTI ID:5867102

Franklin, J

The implications of recent baryon-magnetic-moment measurements for various assumptions in the quark model are considered. The static quark model is seen to give a qualitative understanding of the baryon magnetic moments, but fails in a quantitative test (chi/sup 2//DF = 21.5/5), largely due to inconsistency of the now accurate determinations of the ..lambda../sup 0/ and ..xi../sup 0/ moments. Introducing nonstatic effects (orbital, relativistic, or exchange) still permits four independent sum rules to be written (for eight moments) if approximate SU(3) symmetry is assumed for quark-model wave functions. Two sum rules give good agreement with experiment, but those sum rules for any case involving the ..xi../sup -/ or ..sigma../sup -/ moments do not, suggesting that their experimental determination is inconsistent with such a quark model.

• Research Organization: Department of Physics, Temple University, Philadelphia, Pennsylvania 19122
• OSTI ID: 5867102
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 20:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

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645301 -- High Energy Physics-- Particle Invariance Principles & Symmetries-- General-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BARYONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FUNCTIONS
HADRONS
LIE GROUPS
LIFETIME
MAGNETIC MOMENTS
MASS DIFFERENCE
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
QUARK MODEL
SPIN
SU GROUPS
SU-3 GROUPS
SUM RULES
SYMMETRY GROUPS
WAVE FUNCTIONS