The role of the Roper in QCD

S. R. Beane, U. Van Kolck

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


We show that existing data suggest a simple scenario in which the nucleon and the Δ and Roper resonances act as chiral partners in a reducible representation of the full QCD chiral symmetry group. We discuss the peculiar interpretation of this scenario using spin-flavour symmetries of the naive constituent quark model, as well as the consistency of the scenario with large-Nc expectations.

Original languageEnglish (US)
Pages (from-to)921-933
Number of pages13
JournalJournal of Physics G: Nuclear and Particle Physics
Issue number8
StatePublished - Aug 1 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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