Thermal photons as a measure for the rapidity dependence of the temperature
A. Dumitru, U. Katscher, J. A. Maruhn, H. Stöcker, W. Greiner, D. H. Rischke
Abstract
The rapidity distribution of thermal photons produced in Pb+Pb collisions at CERN-SPS energies is calculated within scaling and three-fluid hydrodynamics. It is shown that these scenarios lead to very different rapidity spectra. A measurement of the rapidity dependence of photon radiation can give cleaner insight into the reaction dynamics than pion spectra, especially into the rapidity dependence of the temperature.
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