What can we learn from the directed flow in heavy-ion collisions at BES RHIC energies?

Abstract

Analysis of directed flow ($v_1$) of protons, antiprotons and pions in heavy-ion collisions is performed in the range of collision energies $\sqrt{s_{NN}}$ = 2.7--39 GeV. Simulations have been done within a three-fluid model employing a purely hadronic equation of state (EoS) and two versions of the EoS with deconfinement transitions: a first-order phase transition and a smooth crossover transition. The crossover EoS is unambiguously preferable for the description of the most part of experimental data in this energy range. The directed flow indicates that the crossover deconfinement transition takes place in semicentral Au+Au collisions in a wide range of collision energies 4 \lsim\sqrt{s_{NN}}\lsim$ 30 GeV. The obtained results suggest that the deconfinement EoS's in the quark-gluon sector should be stiffer at high baryon densities than those used in the calculation. The latter finding is in agreement with that discussed in astrophysics.

6 pages, 4 figures, the paper extends results of arXiv:1412.1669

References in corpus (13)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Transverse momentum analysis of collective motion in relativistic nuclear collisions
• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Examination of the directed flow puzzle in heavy-ion collisions
• Lattice QCD Constraints on the Nuclear Equation of State
• Directed Flow Indicates a Crossover Deconfinement Transition in Relativistic Nuclear Collisions
• Systematics of Kinetic Freeze-out Properties in High Energy Collisions from STAR
• Dynamical Freeze-out in 3-Fluid Hydrodynamics
• Collective Flow in Heavy-Ion Collisions from AGS to SPS
• On freeze-out problem in relativistic hydrodynamics

Cited by in corpus (22)

• Estimates of hyperon polarization in heavy-ion collisions at collision energies $\sqrt{s_{NN}}=$ 4--40 GeV
• Momentum-dependent potential and collective flows within the relativistic quantum molecular dynamics approach based on relativistic mean-field theory
• Equation of state dependence of directed flow in a microscopic transport model
• Event simulation based on three-fluid hydrodynamics for collisions at energies available at the Dubna Nuclotron-based Ion Collider Facility and at the Facility for Antiproton and Ion Research in Darmstadt
• Mean-field update in the JAM microscopic model: Mean-field effects on collective flow in high-energy heavy-ion collisions at $\sqrt{s_{NN}}=2-20$ GeV energies
• Vorticity in heavy-ion collisions at the JINR Nuclotron-based Ion Collider fAcility
• Correlation between global polarization, angular momentum and flow in heavy-ion collisions
• Sensitivity of the excitation functions of collective flow to relativistic scalar and vector meson interactions in the relativistic quantum molecular dynamics model RQMD.RMF
• Directed flow of $\Lambda$ in high-energy heavy-ion collisions and $\Lambda$ potential in dense nuclear matter
• Vortex rings in fragmentation regions in heavy-ion collisions at $\sqrt{s_{NN}}=$ 39 GeV
• Beam energy dependence of squeeze-out effect on the directed and elliptic flow in Au+Au collisions at high baryon density region
• Enhancement of elliptic flow can signal a first order phase transition in high energy heavy ion collisions
• Three-fluid Hydrodynamics-based Event Simulator Extended by UrQMD final State interactions (THESEUS) for FAIR-NICA-SPS-BES/RHIC energies
• Bulk Properties of the Matter Produced at Energies of the Beam Energy Scan Program
• High baryon and energy densities achievable in heavy-ion collisions at $\sqrt{s_{NN}}=$ 39 GeV
• Estimates of the baryon densities attainable in heavy-ion collisions from the beam energy scan program
• Examination of STAR fixed-target data on directed flow at $\sqrt{s_{NN}}=$ 3 and 4.5 GeV
• Recent selected theory developments for NICA
• Light-nuclei production in heavy-ion collisions within a thermodynamical approach
• Directed flow in heavy-ion collisions and its implications for astrophysics
• Predictions of baryon directed flow in heavy-ion collisions at high baryon density
• Space-time regions of high baryon density and baryon stopping in heavy-ion collisions