Baryon magnetic moments in alternate 1/Nc expansions

Richard Lebed, Russell H. Terbeek

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

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 languageEnglish (US)
Article number016009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number1
DOIs
StatePublished - Jan 21 2011

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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