2009/12/31 by S. V. Akkelin, Yu. M. Sinyukov · 17 citations
Physics and Astronomy · #Boltzmann equation #Cosmology and Gravitation Theories #Exact solutions in general relativity #High-Energy Particle Collisions Research #Initial value problem #Initialization #Momentum (technical analysis) #Nuclear physics #Optical properties and cooling technologies in crystalline materials #Physics #Plasma #Quantum electrodynamics #Quantum mechanics #Quark–gluon plasma #Relaxation (psychology) #Stage (stratigraphy) #Statistical physics #Stress–energy tensor #Tensor (intrinsic definition) #Thermodynamics #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.81.064901
published in Physical Review C 81(6) (American Institute of Physics) · 16 pages, minor corrections, to appear in Phys. Rev. C
openalex publication_date 2010/06/04 · arxiv created 2010/06/10 · arxiv updated 2010/07/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.