Photons from axial-vector radiative decay in a hadron gas

Abstract

Strange and non-strange axial-vector meson radiative decays contribute to photon production in hadron gas. One- and two-hadron radiative decay modes of $b_1(1235)$, $a_1(1260)$ and $K_1(1270)$ are studied. At 200 MeV temperature and for a narrow range in photon energies they contribute more to the net thermal photon production rate than $\pi \rho \to \pi \gamma$, $\pi \pi \to \rho \gamma$ or $\rho \to \pi \pi \gamma$. They provide significant contribution to the rate for photon energies as high as 1.5--2.0 GeV. For higher energies they are less important.

Comments: 10 pages + 7 figures uuencoded in separate file, MSUCL-926