High baryon and energy densities achievable in heavy-ion collisions at $\sqrt{s_{NN}}=$ 39 GeV

Abstract

Baryon and energy densities, which are reached in central Au+Au collisions at collision energy of $\sqrt{s_{NN}}=39$ GeV, are estimated within the model of three-fluid dynamics. It is shown that the initial thermalized mean proper baryon and energy densities in a sizable central region approximately are $n_B/n_0\approx$ 10 and $\epsilon \approx$ 40 GeV/fm${}^3$, respectively. The study indicates that the deconfinement transition at the stage of interpenetration of colliding nuclei makes the system quite opaque. The final fragmentation regions in these collisions are formed not only by primordial fragmentation fireballs, i.e. the baryon-rich matter passed through the interaction region (containing approximately 30\% of the total baryon charge), but also by the baryon-rich regions of the central fireball pushed out to peripheral rapidities by the subsequent almost one-dimensional expansion of the central fireball along the beam direction.

4 pages, 4 figures, minor corrections, version published in Phys. Rev. C

References in corpus (7)

• Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
• Lattice QCD Constraints on the Nuclear Equation of State
• Dynamical Freeze-out in 3-Fluid Hydrodynamics
• On freeze-out problem in relativistic hydrodynamics
• What can we learn from the directed flow in heavy-ion collisions at BES RHIC energies?
• High Baryon Densities in Heavy Ion Collisions at Energies Attainable at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider
• Baryon deceleration by strong chromofields in ultrarelativistic nuclear collisions

Cited by in corpus (8)

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• Different space-time freeze-out picture -- an explanation of different $\Lambda$ and $\bar{\Lambda }$ polarization?
• Vortex rings in fragmentation regions in heavy-ion collisions at $\sqrt{s_{NN}}=$ 39 GeV
• Vorticity and Particle Polarization in Relativistic Heavy-Ion Collisions
• Bulk Properties of the Matter Produced at Energies of the Beam Energy Scan Program
• Estimates of the baryon densities attainable in heavy-ion collisions from the beam energy scan program
• Equilibration and baryon densities attainable in relativistic heavy-ion collisions
• Space-time regions of high baryon density and baryon stopping in heavy-ion collisions