Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-11-18
Phys.Lett. B345 (1995) 307-312
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, figures are uudecoded compressed and tared
Scientific paper
10.1016/0370-2693(94)01620-R
Using a three-dimensional hydrodynamic simulation of the collision and an equation of state containing a first order phase transition to the quark-gluon plasma, we study thermal photon production for $Au+Au$ collisions at $E_{lab}=11.5$ AGeV and for $Pb+Pb$ collisions at $160$ AGeV. We obtain surprisingly high rates of thermal photons even at the lower energy, suggesting that, contrary to what was expected so far, photon production may be an interesting topic for experimental search also at the Alternating Gradient Synchrotron. When applied to the reaction $S+Au$ at $200$ AGeV, our model can reproduce preliminary data obtained by the WA80 Collaboration without having to postulate the existence of an extremely long-lived mixed phase as was recently proposed.
Arbex N.
Ornik Udo
Plümer Michael
Timmermann Axel
Weiner Richard M.
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