Baryon Magnetic Moments in Alternate 1/N_c Expansions

Details Baryon Magnetic Moments in Alternate 1/N_c Expansions Baryon Magnetic Moments in Alternate 1/N_c Expansions

2010-11-14

arxiv.org/abs/1011.3237v1

Phys.Rev.D83:016009,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, ReVTeX

Scientific paper

10.1103/PhysRevD.83.016009

Recent work shows not only the necessity of a 1/N_c expansion to explain the observed mass spectrum of the lightest baryons, but also that at least two distinct large N_c expansions, in which quarks transform under either the color fundamental or the two-index antisymmetric representation of SU(N_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_c expansion, providing experimental evidence that nature decisively distinguishes among 1/N_c expansions for this observable.

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