Eur. Phys. J. A 14, 87-93 (2002)
A role of the axial-vector mesons on the photon production in heavy-ion collisions and their relevant decaysY.C. Shin1, M.K. Cheoun2, K.S. Kim3 and T.K. Choi4
1 Cyclotron Application Laboratory, Korea Cancer Center Hospital, Seoul, 139-706, Korea
2 IUCNSF, Building 139-1, Seoul National University, Seoul, 151-742, Korea
3 BK21 Physics Research Division and Institute of Basic Science, Sung Kyun Kwan University, Suwon, 440-746, Korea
4 Department of Physics, Yonsei University, Wonju, 220-710, Korea
(Received: 8 August 2001 / Revised version: 14 January 2002 Communicated by A Schäfer)
A role of the axial-vector mesons, such as K1 and a1, on the emitted-photon spectrum in hot hadronic matter is studied through the channels and . Both channels could be dominant over the region lower than 0.5 GeV, while the role of the K1 meson is diminished in the higher region. This study is carried out with an effective chiral Lagrangian which includes vector and axial-vector mesons systematically and explains well their hadronic and radiative decays simultaneously.
13.25.Jx - Decays of other mesons.
13.30.Eg - Hadronic decays.
25.75.Dw - Particle and resonance production.
25.70.-z - Low and intermediate energy heavy-ion reactions.
© Società Italiana di Fisica, Springer-Verlag 2002