Excited baryon phenomenology from large-[Formula presented] QCD

Dan Pirjol, Tung Mow Yan

Research output: Contribution to journalArticlepeer-review

93 Scopus citations

Abstract

We present a phenomenological analysis of the strong couplings of the negative-parity (Formula presented) baryons from the perspective of the large-(Formula presented) expansion. In the large-(Formula presented) limit the mass spectrum and mixing pattern of these states are constrained in a very specific way. The mixing angles are completely determined in this limit, with predictions in good agreement with experiment. In the combined large-(Formula presented) and SU(3) limits the pion couplings of the five negative-parity octets to the ground state baryons are given in terms of only 3 independent couplings. The large-(Formula presented) predictions for the ratios of strong couplings are tested against experimental data.

Original languageEnglish
Pages (from-to)5434-5443
Number of pages10
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume57
Issue number9
DOIs
StatePublished - 1998

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