2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202892The problem of nucleon resonances N' with masses below the Delta is considered. We derive bounds for the properties of such states. Some of these are new, while others improve upon existing limits. We discuss the nature of N' states, and their unitary partners, assuming their existence can be verified.11 pages, 11 figureNuclear TheoryHigh Energy Physics - ExperimentHigh Energy Physics - PhenomenologyNuclear Experimenttext