Eur. Phys. J. A 14, 87-93 (2002)
DOI: 10.1140/epja/iepja1273
A role of the axial-vector mesons on the photon production in heavy-ion collisions and their relevant decays
Y.C. Shin1, M.K. Cheoun2, K.S. Kim3 and T.K. Choi41 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
cheoun@phya.snu.ac.kr
(Received: 8 August 2001 / Revised version: 14 January 2002 Communicated by A Schäfer)
Abstract
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