Effect of various particlization scenarios on anisotropic flow and particle production using UrQMD hybrid model

Abstract

We discuss the effect of various particlization scenarios available in the hybrid ultrarelativistic quantum molecular dynamics (UrQMD) event generator on different observables in non-central ($b$ $=$ 5--9 $fm$) Au + Au collisions in the beam energy range 1A-158A GeV. Particlization models switch fluid dynamic description to the transport description using various hypersurface criteria. In addition to particlization models, various equations-of-state (EoS) provided by the UrQMD hybrid model were employed. The observables examined in this paper include the excitation function of anisotropic coefficients such as directed ($v_1$) and elliptic flow ($v_2$), particle ratios of the species, and the shape of net-proton rapidity spectra at mid-rapidity. The results obtained here can help predict and compare the measurements provided by future experiments at the Facility for Antiproton and Ion Research (FAIR) and the Nuclotron-based Ion Collider fAcility (NICA) once the data becomes available. We also study the most suitable combination of the particlization model and EoS, which best describes the experimental measurements.

arXiv comment11 pages, 8 figures

References in corpus (52)

• 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
• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Methods for analyzing anisotropic flow in relativistic nuclear collisions
• Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at 2.76 TeV
• Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
• Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions
• Measurement of the azimuthal anisotropy for charged particle production in sqrt(s_NN) = 2.76 TeV lead-lead collisions with the ATLAS detector
• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR
• System Size, Energy, Pseudorapidity, and Centrality Dependence of Elliptic Flow
• Directed and elliptic flow of charged pions and protons in Pb+Pb collisions at 40 and 158A GeV
• Relativistic Hydrodynamics for Heavy--Ion Collisions -- I. General Aspects and Expansion into Vacuum
• Beam-Energy Dependence of Directed Flow of Protons, Antiprotons and Pions in Au+Au Collisions
• Elliptic Flow: Transition from out-of-plane to in-plane Emission in Au + Au Collisions
• Particlization in hybrid models
• Antiflow of Nucleons at the Softest Point of the EoS
• Third flow component as QGP signal
• Directed and Elliptic Flow in 158 GeV/Nucleon Pb + Pb Collisions
• Measurement of higher-order harmonic azimuthal anisotropy in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV
• Excitation Function of K${}^{+}$ and ${\pi }^{+}$ Production in Au+Au Reactions at 2-10 AGeV
• Momentum spectra, anisotropic flow, and ideal fluids
• Relativistic Hydrodynamics for Heavy--Ion Collisions -- II. Compression of Nuclear Matter and the Phase Transition to the Quark--Gluon Plasma
• An Excitation Function of K${}^{-}$ and K${}^{+}$ Production in Au+Au Reactions at the AGS
• Sideward Flow in Au + Au Collisions Between 2A GeV and 8A GeV
• Baryon Rapidity Loss in Relativistic Au+Au Collisions
• Novel rapidity dependence of directed flow in high energy heavy ion collisions
• Particle ratios at RHIC: Effective hadron masses and chemical freeze-out
• Examination of the directed flow puzzle in heavy-ion collisions
• Directed flow, a signal for the phase transition in Relativistic Nuclear Collisions?
• Examination of directed flow as a signature of the softest point of the equation of state in QCD matter
• Energy dependence of directed flow over a wide range of pseudorapidity in Au+Au collisions at RHIC
• Pseudorapidity dependence of anisotropic flows in relativistic heavy-ion collisions
• Evolution of elliptic and triangular flow as a function of collision energy in a hybrid model
• Effects of a phase transition on HBT correlations in an integrated Boltzmann+Hydrodynamics approach
• Effects of flow fluctuations and partial thermalization on $v_4$
• On the Origin of the Elliptic Flow and its Dependence on the Equation of State in Heavy Ion Reactions at Intermediate Energies
• v4 from ideal and viscous hydrodynamic simulations of nuclear collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC)
• Directed Flow of $\Lambda$-Hyperons in 2-6 AGeV Au+Au Collisions
• Anti-flow of K${}_s^0$ Mesons in 6 AGeV Au + Au Collisions
• Baryon Stopping as a Probe of Deconfinement Onset in Relativistic Heavy-Ion Collisions
• Robustness of the Baryon-Stopping Signal for the Onset of Deconfinement in Relativistic Heavy-Ion Collisions
• $<m_T>$ excitation function: Freeze-out and equation of state dependence
• Differential elliptic flow of identified hadrons and constituent quark number scaling at FAIR
• Baryon Stopping in Heavy-Ion Collisions at E_{lab}= 2--160 GeV/nucleon
• Elliptic Flow of Protons and Antiprotons in Au+Au Collisions at $\sqrt{s_{NN}}$ = 7.7--62.4 GeV within Alternative Scenarios of Three-Fluid Dynamics
• The enhancement of $v_4$ in nuclear collisions at the highest densities signals a first order phase transition
• Simulation study of elliptic flow of charged hadrons produced in Au + Au collisions at the Facility for Antiproton and Ion Research
• Dependence on beam energy and nuclear equation of state dependence of anisotropic flow and particle production in low-energy heavy-ion collisions
• Anisotropic flow of charged and identified hadrons at FAIR energies and its dependence on the nuclear equation of state