Equation of State, Flow, Fluctuations and $J/\psi$ suppression

Abstract

Radial flow observed at AGS/SPS energies is very strong, with collective velocities of matter reaching about 0.5c for central collisions of the heaviest ions. The lattice-based Equation of State (EOS) is however rather soft, due to the QCD phase transition. We show that both statements are consistent only if proper kinetic-based treatment of the freeze-out is made. In fact chemical and thermal freeze-out happen at quite different conditions, especially at SPS. Event-by-event fluctuations can shed new light on this problem. We also propose new model of "anomalous" $J/\psi$ suppression found for PbPb collisions, related it to prolonged lifetime of dense matter due the "softest point" of the EOS.

Plenary Talk at Quark Matter 97, Tsukuba, Dec.1997

References in corpus (2)

• The Transverse Momentum Dependence of Anomalous $J/\psi$ Suppression
• $J/\psi$ suppression in heavy ion collsions and the QCD phase transition

Cited by in corpus (7)

• Chemical and Thermal Freeze-Out Parameters from 1 to 200 A.GeV
• Perfect Fluidity of the Quark Gluon Plasma Core as Seen through its Dissipative Hadronic Corona
• Event-by-event fluctuations in collective quantities
• What have we learned and want to learn from heavy ion collisions at CERN SPS?
• Quark Matter 99 Summary: Hadronic Signals
• Flow Buildup in a Mixed Phase of Quark-Gluon Plasma Plus Hadrons
• Relativistic heavy ion collisions --- Where are we now? Where do we go?