Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-05-29
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 5 figures
Scientific paper
10.1140/epjc/s10052-007-0374-8
A method is developed to consistently satisfy the Gibbs equilibrium conditions between the quark-gluon and hadronic phase, although each phase has been formulated in separate grand canonical partition functions containing three quark flavours. The sector in the space of thermodynamic variables, where the transition takes place, is restricted to a curve, according to the phase diagram of QCD. The conservation laws of quantum numbers are also imposed on the transition curve. The effect of the inclusion of the newly discovered pentaquark states is considered. The freeze-out conditions of S+S, S+Ag (SPS) and Au+Au (RHIC) are found compatible with a primordial QGP phase, but the conditions indicated by Pb+Pb (SPS) are not.
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