2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48481The three complex form factors entering the $Δ\to Nγ^\ast$ vertex are calculated to ${\cal O}(ε^3)$ in the framework of a chiral effective theory with explicit $Δ$(1232) degrees of freedom. Furthermore, the role of presently unknown low energy constants that affect the values of EMR and CMR is elucidated.5 pages, 3 figures, Oral contribution given at the 8th International Conference on the Structure of Baryons (Baryons '98), Bonn, Germany, Sept. 22-26, 1998High Energy Physics - Phenomenologytext