Comparison of space-time evolutions of hot/dense matter in   $\sqrt{s_{NN}}$=17 and 130 GeV relativistic heavy ion collisions based on a   hydrodynamical model
  Based on a hydrodynamical model, we compare 130 GeV/$A$ Au+Au collisions at RHIC and 17 GeV/$A$ Pb+Pb collisions at SPS. The model well reproduces the single-particle distributions of both RHIC and SPS.   The numerical solution indicates that huge amount of collision energy in RHIC is mainly used to produce a large extent of hot fluid rather than to make a high temperature matter; longitudinal extent of the hot fluid in RHIC is much larger than that of SPS and initial energy density of the fluid is only 5% higher than the one in SPS. The solution well describes the HBT radii at SPS energy but shows some deviations from the ones at RHIC. 
Kenji Morita, Shin Muroya, Chiho Nonaka, Tetsufumi Hirano