Initialization of hydrodynamics in relativistic heavy ion collisions with an energy-momentum transport model

Abstract

A key ingredient of hydrodynamical modeling of relativistic heavy ion collisions is thermal initial conditions, an input that is the consequence of a pre-thermal dynamics which is not completely understood yet. In the paper we employ a recently developed energy-momentum transport model of the pre-thermal stage to study influence of the alternative initial states in nucleus-nucleus collisions on flow and energy density distributions of the matter at the starting time of hydrodynamics. In particular, the dependence of the results on isotropic and anisotropic initial states is analyzed. It is found that at the thermalization time the transverse flow is larger and the maximal energy density is higher for the longitudinally squeezed initial momentum distributions. The results are also sensitive to the relaxation time parameter, equation of state at the thermalization time, and transverse profile of initial energy density distribution: Gaussian approximation, Glauber Monte Carlo profiles, etc. Also, test results ensure that the numerical code based on the energy-momentum transport model is capable of providing both averaged and fluctuating initial conditions for the hydrodynamic simulations of relativistic nuclear collisions.

arXiv comment29 pages, 15 figures, minor changes, to be published in Phys. Rev. C

References in corpus (47)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Collective flow and viscosity in relativistic heavy-ion collisions
• The Color Glass Condensate
• Hydrodynamic Modeling of Heavy-Ion Collisions
• Hadron production in nuclear collisions at RHIC and high density QCD
• Fluctuating Glasma initial conditions and flow in heavy ion collisions
• Collective Modes of an Anisotropic Quark-Gluon Plasma
• Manifestations of high density QCD in the first RHIC data
• Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
• Dissipative Dynamics of Highly Anisotropic Systems
• Universal attractor in a highly occupied non-Abelian plasma
• A Quantitative Analysis of Charmonium Suppression in Nuclear Collisions
• A 3+1 dimensional viscous hydrodynamic code for relativistic heavy ion collisions
• Particlization in hybrid models
• GLISSANDO: GLauber Initial-State Simulation AND mOre
• Heavy ions and string theory
• Event-by-event hydrodynamics and elliptic flow from fluctuating initial state
• Testing viscous and anisotropic hydrodynamics in an exactly solvable case
• The onset of classical QCD dynamics in relativistic heavy ion collisions
• Anisotropic Hydrodynamics for Rapidly Expanding Systems
• Second-order (2+1)-dimensional anisotropic hydrodynamics
• Approach to equilibrium in weakly coupled nonabelian plasmas
• Uniform description of bulk observables in the hydrokinetic model of A+A collisions at RHIC and LHC
• On freeze-out problem in hydro-kinetic approach to A+A collisions
• Quark production, Bose-Einstein condensates and thermalization of the quark-gluon plasma
• A Monte Carlo generator of nucleon configurations in complex nuclei including Nucleon-Nucleon correlations
• Projection method and new formulation of leading-order anisotropic hydrodynamics
• Towards the Little Bang Standard Model
• Fluid Dynamics and Viscosity in Strongly Correlated Fluids
• Hydrodynamics at RHIC and LHC: What have we learned?
• Entropy Creation in Relativistic Heavy Ion Collisions
• Hydro-kinetic approach to relativistic heavy ion collisions
• Initial state anisotropies and their uncertainties in ultrarelativistic heavy-ion collisions from the Monte Carlo Glauber model
• Turbulent thermalization process in high-energy heavy-ion collisions
• Highly anisotropic hydrodynamics -- discussion of the model assumptions and forms of the initial conditions
• Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model
• Anisotropic Hydrodynamics: Motivation and Methodology
• Matching pre-equilibrium dynamics and viscous hydrodynamics
• Femtoscopic scales in central A+A collisions at RHIC and LHC energies in hydrokinetic model
• Kinetic evolution of the glasma and thermalization in heavy ion collisions
• Accounting for backflow in hydrodynamic-simulation interfaces
• Matching of nonthermal initial conditions and hydrodynamic stage in ultrarelativistic heavy-ion collisions
• Coarse graining scale and effectiveness of hydrodynamic modeling
• Entanglement of scales as a possible mechanism for decoherence and thermalization in relativistic heavy ion collisions
• Viscous hydrodynamics for strongly anisotropic expansion
• Thermalization of the world's smallest fluids: recent developments

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