Baryon Magnetic Moments in Alternate 1/N_c Expansions
High Energy Physics - Phenomenology
2011-02-01 v1 Nuclear Theory
Abstract
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.
Keywords
Cite
@article{arxiv.1011.3237,
title = {Baryon Magnetic Moments in Alternate 1/N_c Expansions},
author = {Richard F. Lebed and Russell H. TerBeek},
journal= {arXiv preprint arXiv:1011.3237},
year = {2011}
}
Comments
18 pages, ReVTeX