A Role of the Axial Vector Mesons on the Photon Production in Heavy Ion Collisions and Their Relevant Decays
Abstract
A 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 \pi \rho \to a_1 \to \pi \gamma and K \rho \to K_1 \to K \gamma. 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.