Measures of critical behaviour at quark-hadron phase transition

by R. HWA (Univ. of Oregon)

Wednesday 7 Jun 2000, 11:00 → 14:00 Europe/Zurich

CERN

Critical behaviours of quark-hadron phase transition in high-energy heavy-ion collisions are investigated with the aim of identifying hadronic observable. The surface of the plasma cylinder is mapped onto a 2D lattice. The Ising model is used to simulate configurations corresponding to crossover transitions in accordance to the findings of QCD lattice gauge theory. Hadrons are formed in clusters of all sizes. Various measures are examined to quantify the fluctuations of the cluster sizes and of the voids among the clusters. The canonical power-law behaviours near the critical temperature are found for appropriately chosen measures. Since the temperature is not directly observable, attention is given to the problem of finding observable measures. It is demonstrated that for the measures considered the dependence on the final-state randomisation and configuration mixing are weak. Thus the critical behaviour of the measures proposed is likely to survive the scattering effect of the hadron gas in the final state.

Organiser(s): Yiota Foka and Ulrich Heinz

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