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 language||English (US)|
|Number of pages||13|
|Journal||Journal of Physics G: Nuclear and Particle Physics|
|Publication status||Published - Aug 1 2005|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics