2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81693A role of the axial vector mesons, such as $K_1$ and $a_1$, on the emitted photon spectrum in hot hadronic matter is studied through the channels $πρ\to a_1 \to πγ$ and $K ρ\to K_1 \to K γ$. They are shown to be dominant channels in this spectrum. This study is carried out with an effective chiral lagrangian which includes vector and axial-vector mesons and explains well their relevant decays simultaneously.12 pages, 2 figuresNuclear Theorytext