1998/01/22 by E. V. Shuryak, Edward Shuryak
Physics and Astronomy · #Classical mechanics #Cosmology and Gravitation Theories #Equation of state #Event (particle physics) #Flow (mathematics) #High-Energy Particle Collisions Research #Ion #Kinetic energy #Mechanics #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Statistical physics #Thermal #Thermal fluctuations #Thermodynamics #hep-ph
paper · pdf · doi:10.1016/s0375-9474(98)00414-x
published as Nucl.Phys. A638 (1998) 207-218 · Plenary Talk at Quark Matter 97, Tsukuba, Dec.1997
arxiv created 1998/01/22 · openalex publication_date 1998/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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/ψ suppression found for PbPb collisions, related it to prolonged lifetime of dense matter due the "softest point" of the EOS.