2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/229482The production of $η$ and $η^\prime$ mesons in photon- and hadron-induced reactions are studied in a combined analysis based on an effective Lagrangian approach in order to learn about the relevant production mechanisms and the possible role of nucleon resonances in these reactions.8 pages, Presented at the International Symposium on Meson Physics, Oct. 1-4, 2008, Krakow, PolandNuclear Theorytext