Baryon magnetic moments in alternate 1/N{sub c} expansions

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.016009· OSTI ID:21503910

Lebed, Richard F; TerBeek, Russell H ^[1]

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1. Department of Physics, Arizona State University, Tempe, Arizona 85287-1504 (United States)

Recent work shows not only the necessity of a 1/N{sub c} expansion to explain the observed mass spectrum of the lightest baryons, but also that at least two distinct large N{sub c} expansions, in which quarks transform under either the color-fundamental or the two-index antisymmetric representation of SU(N{sub c}), work comparably well. Here we show that the baryon magnetic moments do not support this ambivalence; they strongly prefer the color-fundamental 1/N{sub c} expansion, providing experimental evidence that nature decisively distinguishes among 1/N{sub c} expansions for this observable.

• OSTI ID: 21503910
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 1; Other Information: DOI: 10.1103/PhysRevD.83.016009; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COLOR MODEL
EXPANSION
MAGNETIC MOMENTS
MASS SPECTRA
QUARKS
SU GROUPS
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
QUARK MODEL
SPECTRA
SYMMETRY GROUPS