Matching of nonthermal initial conditions and hydrodynamic stage in ultrarelativistic heavy-ion collisions

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.064901· OSTI ID:21388619

Akkelin, S V; Sinyukov, Yu M ^[1]

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1. Bogolyubov Institute for Theoretical Physics, Metrolohichna street 14b, 03680 Kiev (Ukraine)

A simple approach is proposed allowing actual calculations of the preequilibrium dynamics in ultrarelativistic heavy-ion collisions to be performed for a far-from-equilibrium initial state. The method is based on the phenomenological macroscopic equations that describe the relaxation dynamics of the energy-momentum tensor and are motivated by Boltzmann kinetics in the relaxation-time approximation. It gives the possibility to match smoothly a nonthermal initial state to the hydrodynamics of the quark gluon plasma. The model contains two parameters, the duration of the prehydrodynamic stage and the initial value of the relaxation-time parameter, and allows one to assess the energy-momentum tensor at a supposed time of initialization of the hydrodynamics.

• OSTI ID: 21388619
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevC.81.064901; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
COMPUTERIZED SIMULATION
ENERGY-MOMENTUM TENSOR
EQUATIONS
EQUILIBRIUM
HEAVY ION REACTIONS
HYDRODYNAMICS
QUARK MATTER
RELATIVISTIC RANGE
RELAXATION
RELAXATION TIME
CALCULATION METHODS
ENERGY RANGE
FLUID MECHANICS
MATTER
MECHANICS
NUCLEAR REACTIONS
SIMULATION
TENSORS