2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203344We study the line shapes of radiative $ϕ$-decays involving virtual $f_{0}(980)$ and $a_{0}(980)$ mesons which decay, via derivative couplings, to $π^{0}π^{0}$ and $π^{0}η$ respectively. After developing the formalism for derivative interactions at one-loop level, we show that they can reproduce the measured peaked line shapes of $ϕ$-decays without including kaon loops.12 pages, 4 figures and 3 tables. Revised Introduction and ConclusionsHigh Energy Physics - Phenomenologytext