2011/03/21 by A. V. Merdeev, L. M. Satarov, I. N. Mishustin
Physics and Astronomy · #Atomic physics #Classical mechanics #Deconfinement #Dissipative system #Elliptic flow #Equation of state #Hadron #Heavy ion #High-Energy Particle Collisions Research #Ion #Lorentz transformation #Mechanics #Nuclear physics #Particle physics theoretical and experimental studies #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Rapidity #Resonance (particle physics) #Shock wave #Strangeness #Thermodynamics #hep-ph
paper · pdf · doi:10.1103/physrevc.84.014907
published as Phys.Rev.C84:014907,2011 · 38 pages, 28 figures
arxiv created 2011/03/21 · openalex publication_date 2011/07/29 · arxiv updated 2015/03/18 · openalex created_date 2017/10/06 · openalex updated_date 2026/08/05
We use (3 + 1) dimensional ideal hydrodynamics to describe the space-time evolution of strongly interacting matter created in Au + Au and Pb + Pb collisions. The model is applied for the domain of bombarding energies 1--160 GeV/nucleon which includes future NICA (Dubna) and FAIR (Darmstadt) experiments. Two equations of state are used, the first one corresponding to resonance hadron gas and the second one including the deconfinement phase transition. The initial state is represented by two Lorentz-boosted nuclei. Dynamic trajectories of matter in the central box of the system are analyzed. They can be well represented by a fast shock-wave compression followed by a relatively slow isentropic expansion. The parameters of collective flows and hadronic spectra are calculated under assumption of the isochronous freeze-out. It is shown that the deconfinement phase transition leads to broadening of proton rapidity distributions, increase of elliptic flows, and formation of the directed antiflow in the central rapidity region. These effects are most pronounced at bombarding energies around 10 GeV/nucleon, when the system spends the longest time in the mixed phase. From the comparison with three-fluid calculations we conclude that the transparency effects are not so important in central collisions at NICA--FAIR energies (below 30 GeV/nucleon).