We consider the $a_{ 1} (1260)$ contribution to photon and dilepton productions from hot hadronic matter. The effective lagrangian with $\pi, \rho$ and $a_{ 1}$ discussed by Ko and Rudaz is employed, which successfully reproduces the $\Gamma (a_{ 1} \rightarrow \pi \gamma) = 670$ keV. Our results for the photon production rate are comparable to those obtained by Xiong { \it et al.}, while the dilepton production rates come out smaller than those obtained by Gale { \it et al.} by an order of magnitude.
Categories: hep-ph