Matching pre-equilibrium dynamics and viscous hydrodynamics

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024906· OSTI ID:21388874

Martinez, Mauricio ^[1]; Strickland, Michael ^[2]

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1. Helmholtz Research School and Otto Stern School, Goethe-Universitaet Frankfurt am Main, Ruth-Moufang-Str. 1, D-60438 Frankfurt am Main (Germany)
2. 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, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPARATIVE EVALUATIONS
ENERGY DENSITY
ENERGY-MOMENTUM TENSOR
ENTROPY
EQUILIBRIUM
EVALUATION
EXPANSION
HYDRODYNAMIC MODEL
LIFETIME
MATHEMATICAL MODELS
MATTER
ONE-DIMENSIONAL CALCULATIONS
PARTICLE MODELS
PHYSICAL PROPERTIES
QUARK MATTER
STATISTICAL MODELS
TENSORS
THERMODYNAMIC MODEL
THERMODYNAMIC PROPERTIES
VISCOSITY