Hierarchy of kinetic freeze-out parameters in low energy heavy-ion collisions

Abstract

We study the mass dependent hierarchy of kinetic freeze-out parameters of hadrons in low energy heavy-ion collisions. For this purpose, the transverse momentum and rapidity spectra of the identified hadrons produced in central Pb+Pb collisions, available at SPS energies ranging from ${\mathrm{E}}_{\mathrm{Lab}}=20A-158A$ GeV, are analyzed within a generalized non boost-invariant blast wave model. We consider separate simultaneous fits for light hadrons (${\pi }^{-}$, $K^{\pm }$) and heavy strange hadrons ($\Lambda$, $\bar{\Lambda }$, $\varphi$, ${\Xi }^{\pm }$, ${\Omega }^{\pm }$), for which the transverse momentum spectra as well as rapidity spectra are available. We also perform a separate fit to transverse momentum spectra of charmonia ($J/\Psi$, ${\Psi }^{\prime }$) at $158A$ GeV collisions. We find a clear mass dependent hierarchy in the fitted kinetic freeze-out parameters. Further, we study the rapidity spectra using analytical Landau flow solution for non-conformal systems. We find that the fitted value of sound velocity in the medium also shows a similar hierarchy.

arXiv comment13 pages, 12 figures, published in Physical Review C

References in corpus (38)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• The equation of state in (2+1)-flavor QCD
• Full result for the QCD equation of state with 2+1 flavors
• Thermal phenomenology of hadrons from 200 AGeV S+S collisions
• The QCD equation of state with dynamical quarks
• Flow at the SPS and RHIC as a Quark Gluon Plasma Signature
• Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at 2.76 TeV
• Equation of state and QCD transition at finite temperature
• Measurement of the azimuthal anisotropy for charged particle production in sqrt(s_NN) = 2.76 TeV lead-lead collisions with the ATLAS detector
• Mapping the Phases of Quantum Chromodynamics with Beam Energy Scan
• Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR
• A new measurement of J/psi suppression in Pb-Pb collisions at 158 GeV per nucleon
• Measurement of higher-order harmonic azimuthal anisotropy in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV
• Energy dependence of phi meson production in central Pb+Pb collisions at sqrt(s_nn) = 6 to 17 GeV
• Energy dependence of Lambda and Xi production in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV measured at the CERN Super Proton Synchrotron
• Strange hadron production in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 7.7, 11.5, 19.6, 27, and 39 GeV
• $\Lambda$ and $\bar{\Lambda }$ Production in Central Pb-Pb Collisions at 40, 80, and 158 A$\cdot$GeV
• Landau Hydrodynamics Reexamined
• Omega and Antiomega production in central Pb+Pb collisions at 40 and 158 AGeV
• Strange freezeout
• Production of phi Mesons in Au+Au Collisions at 11.7 A GeV/c
• An Evidence of Mass Dependent Differential Kinetic Freeze-out Scenario Observed in Pb-Pb Collisions at 2.76 TeV
• The Freezeout Hypersurface at LHC from particle spectra: Flavor and Centrality Dependence
• Omega, J/psi and psi' Production in Nuclear Collisions and Quark Gluon Plsama Hadronization
• Radial Flow and Differential Freeze-out in Proton-Proton Collisions at $\sqrt{s}=7$ TeV at the LHC
• Realistic Expanding Source Model for Invariant One-Particle Multiplicity Distributions and Two-Particle Correlations in Relativistic Heavy-Ion Collisions
• Jozso's Legacy: Chemical and Kinetic Freeze-out in Heavy-Ion Collisions
• Kinetic Freeze-out and Radial Flow in 11.6 A GeV Au+Au Collisions
• Basic phenomenology for relativistic heavy-ion collisions
• Kinetic freeze out conditions in nuclear collisions with $2A$ - $158A$ GeV beam energy within a non-boost-invariant blast-wave model
• Kinetic freeze-out in central heavy-ion collisions between 7.7 and 2760 GeV per nucleon pair
• Low Freeze-out Temperature and High Collective Velocities in Relativistic Heavy-Ion Collisions
• Particle spectra and hydro-inspired models
• The low energy frontier: What is exciting about physics below the top RHIC energy
• Viscosity, non-conformal equation of state and sound velocity in Landau hydrodynamics
• Temperatures and chemical potentials at kinetic freeze-out in relativistic heavy ion collisions from coarse grained transport simulations
• Open charm measurements in NA61/SHINE at CERN SPS

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