TY - JOUR
T1 - Baryon magnetic moments in alternate 1/Nc expansions
AU - Lebed, Richard
AU - Terbeek, Russell H.
PY - 2011/1/21
Y1 - 2011/1/21
N2 - Recent work shows not only the necessity of a 1/Nc expansion to explain the observed mass spectrum of the lightest baryons, but also that at least two distinct large Nc expansions, in which quarks transform under either the color-fundamental or the two-index antisymmetric representation of SU(Nc), work comparably well. Here we show that the baryon magnetic moments do not support this ambivalence; they strongly prefer the color-fundamental 1/Nc expansion, providing experimental evidence that nature decisively distinguishes among 1/Nc expansions for this observable.
AB - Recent work shows not only the necessity of a 1/Nc expansion to explain the observed mass spectrum of the lightest baryons, but also that at least two distinct large Nc expansions, in which quarks transform under either the color-fundamental or the two-index antisymmetric representation of SU(Nc), work comparably well. Here we show that the baryon magnetic moments do not support this ambivalence; they strongly prefer the color-fundamental 1/Nc expansion, providing experimental evidence that nature decisively distinguishes among 1/Nc expansions for this observable.
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U2 - 10.1103/PhysRevD.83.016009
DO - 10.1103/PhysRevD.83.016009
M3 - Article
AN - SCOPUS:79551533352
SN - 1550-7998
VL - 83
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 1
M1 - 016009
ER -