Matching pre-equilibrium dynamics and viscous hydrodynamics
- Helmholtz Research School and Otto Stern School, Goethe-Universitaet Frankfurt am Main, Ruth-Moufang-Str. 1, D-60438 Frankfurt am Main (Germany)
- Physics Department, Gettysburg College, Gettysburg, Pennsylvania 17325 (United States)
We demonstrate how to match pre-equilibrium dynamics of a 0+1-dimensional quark-gluon plasma to second-order viscous hydrodynamical evolution. The matching allows us to specify the initial values of the energy density and shear tensor at the initial time of hydrodynamical evolution as a function of the lifetime of the pre-equilibrium period. We compare two models for pre-equilibrium quark-gluon plasma, longitudinal free streaming and collisionally broadened longitudinal expansion, and present analytic formulas that can be used to fix the necessary components of the energy-momentum tensor. The resulting dynamical models can be used to assess the effect of pre-equilibrium dynamics on quark-gluon plasma observables. Additionally, we investigate the dependence of entropy production on pre-equilibrium dynamics and discuss the limitations of the standard definitions of nonequilibrium entropy.
- OSTI ID:
- 21388874
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevC.81.024906; (c) 2010 The American Physical Society; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPARATIVE EVALUATIONS
ENERGY DENSITY
ENERGY-MOMENTUM TENSOR
ENTROPY
EQUILIBRIUM
EXPANSION
HYDRODYNAMIC MODEL
LIFETIME
ONE-DIMENSIONAL CALCULATIONS
QUARK MATTER
VISCOSITY
EVALUATION
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
PHYSICAL PROPERTIES
STATISTICAL MODELS
TENSORS
THERMODYNAMIC MODEL
THERMODYNAMIC PROPERTIES