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.

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

References in corpus (15)

• The Color Glass Condensate
• Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
• Dissipative Dynamics of Highly Anisotropic Systems
• GLISSANDO: GLauber Initial-State Simulation AND mOre
• Event-by-event hydrodynamics and elliptic flow from fluctuating initial state
• 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
• Fluid Dynamics and Viscosity in Strongly Correlated Fluids
• Hydro-kinetic approach to relativistic heavy ion collisions
• 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
• Kinetic evolution of the glasma and thermalization in heavy ion collisions
• Viscous hydrodynamics for strongly anisotropic expansion
• Thermalization of the world's smallest fluids: recent developments

Cited by in corpus (8)

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• Femtoscopy scales and particle production in the relativistic heavy ion collisions from Au+Au at 200 AGeV to Xe+Xe at 5.44 ATeV within the integrated hydrokinetic model
• Kaon and pion maximal emission times extraction from the femtoscopy analysis of $5.02A$ TeV LHC collisions within the integrated hydrokinetic model
• Hydrodynamic description of the baryon-charged quark-gluon plasma
• Space-time structure of particle emission and femtoscopy scales in ultrarelativistic heavy-ion collisions
• Accessing the deuteron source with pion-deuteron femtoscopy in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Extension of the integrated hydrokinetic model to nuclear collision energies relevant for the RHIC Beam-Energy Scan program and the research program at GSI-FAIR
• Particle spectra in the integrated hydrokinetic model at RHIC Beam-Energy-Scan energies