Pion and thermal photon spectra as a possible signal for a phase transition
A. Dumitru, U. Katscher, J. A. Maruhn, H. Stöcker, W. Greiner, D. H. Rischke
Abstract
We calculate thermal photon and neutral pion spectra in ultrarelativistic heavy-ion collisions in the framework of three-fluid hydrodynamics. Both spectra are quite sensitive to the equation of state used. In particular, within our model, recent data for S+Au at 200 AGeV can only be understood if a scenario with a phase transition (possibly to a quark-gluon plasma) is assumed. Results for Au+Au at 11 AGeV and Pb+Pb at 160 AGeV are also presented.
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