A role of the axial-vector mesons on the photon production in heavy-ion collisions and their relevant decays Y.C. Shin, M.K. Cheoun, K.S. Kim and T.K. Choi Eur. Phys. J. A, 14 1 (2002) 87-93 Published online: 15 May 2002 DOI: 10.1140/epja/iepja1273