Masses of orbitally excited baryons in large Nc QCD

Carl E. Carlson, Christopher D. Carone, José L. Goity, Richard F. Lebed

Research output: Contribution to journalArticle

114 Scopus citations

Abstract

We present the first phenomenological study of the masses of orbitally excited baryons in large Nc QCD. Restricting here to the nonstrange sector of the l = 1 baryons, the 1/Nc expansion is used to order and select a basis of effective operators that spans the nine observables (seven masses and two mixing angles). Fits are performed using subsets of the complete set of nine operators, including corrections up to 0(1/Nc) where leading order is Nc1. This study shows that the 1/Nc expansion provides an excellent framework for analyzing the mass spectrum, and uncovers a new hierarchy of operator contributions.

Original languageEnglish (US)
Pages (from-to)327-335
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume438
Issue number3-4
DOIs
StatePublished - Oct 22 1998
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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