Pion and Strangeness Production as Signals of QCD Phase Transition

Details Pion and Strangeness Production as Signals of QCD Phase Transition Pion and Strangeness Production as Signals of QCD Phase Transition

1997-01-24

arxiv.org/abs/nucl-th/9701050v2

Physics

Nuclear Physics

Nuclear Theory

8 pages, 2 figures, typing errors corrected

Scientific paper

It is shown that data on pion and strangeness production in central nucleus-nucleus collisions are consistent with the hypothesis of a Quark Gluon Plasma formation between 15 A GeV/c (BNL AGS) and 160 A GeV/c (CERN SPS) collision energies. The experimental results interpreted in the framework of a statistical approach indicate that the effective number of degrees of freedom increases by a factor of about 3 in the course of the phase transition and that the plasma created at CERN SPS energy may have a temperature of about 280 MeV (energy density $\approx$ 10 GeV/fm^3). Experimental studies of central Pb+Pb collisions in the energy range 20-160 A GeV/c are urgently needed in order to localize the threshold energy, and study the properties of the QCD phase transition.

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