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.
|Original language||English (US)|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Jan 21 2011|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)