Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions
Abstract
We develop a macroscopic description of the space-time evolution of the energy-momentum tensor during the pre-equilibrium stage of a high-energy heavy-ion collision. Based on a weak coupling effective kinetic description of the microscopic equilibration process (à la “bottom-up”), we calculate the nonequilibrium evolution of the local background energy-momentum tensor as well as the nonequilibrium linear response to transverse energy and momentum perturbations for realistic boost-invariant initial conditions for heavy-ion collisions. We demonstrate how this framework can be used on an event-by-event basis to propagate the energy-momentum tensor from far-from-equilibrium initial-state models to the time τ hydro when the system is well described by relativistic viscous hydrodynamics. The subsequent hydrodynamic evolution becomes essentially independent of the hydrodynamic initialization time τhydro as long as τhydro is chosen in an appropriate range where both kinetic and hydrodynamic descriptions overlap. We find that for √sNN = 2.76 TeV central Pb-Pb collisions, the typical timescale when viscous hydrodynamics with shear viscosity over entropy ratio η/s = 0.16 becomes applicable is τhydro ~1 fm /c after the collision.
- Authors:
- Publication Date:
- Research Org.:
- Duke Univ., Durham, NC (United States); State Univ. of New York (SUNY), Albany, NY (United States); Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1503381
- Alternate Identifier(s):
- OSTI ID: 1609636
- Grant/Contract Number:
- FG02-88ER40388; FG02-05ER41367; FG02-97ER41014
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. C
- Additional Journal Information:
- Journal Name: Physical Review. C Journal Volume: 99 Journal Issue: 3; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; physics; collective flow; quark-gluon plasma; relativistic heavy-ion collisions; relativistic kinetic theory
Citation Formats
Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean-François, Schlichting, Sören, and Teaney, Derek. Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions. United States: N. p., 2019.
Web. doi:10.1103/PhysRevC.99.034910.
Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean-François, Schlichting, Sören, & Teaney, Derek. Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions. United States. https://doi.org/10.1103/PhysRevC.99.034910
Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean-François, Schlichting, Sören, and Teaney, Derek. Wed .
"Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions". United States. https://doi.org/10.1103/PhysRevC.99.034910.
@article{osti_1503381,
title = {Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions},
author = {Kurkela, Aleksi and Mazeliauskas, Aleksas and Paquet, Jean-François and Schlichting, Sören and Teaney, Derek},
abstractNote = {We develop a macroscopic description of the space-time evolution of the energy-momentum tensor during the pre-equilibrium stage of a high-energy heavy-ion collision. Based on a weak coupling effective kinetic description of the microscopic equilibration process (à la “bottom-up”), we calculate the nonequilibrium evolution of the local background energy-momentum tensor as well as the nonequilibrium linear response to transverse energy and momentum perturbations for realistic boost-invariant initial conditions for heavy-ion collisions. We demonstrate how this framework can be used on an event-by-event basis to propagate the energy-momentum tensor from far-from-equilibrium initial-state models to the time τ hydro when the system is well described by relativistic viscous hydrodynamics. The subsequent hydrodynamic evolution becomes essentially independent of the hydrodynamic initialization time τhydro as long as τhydro is chosen in an appropriate range where both kinetic and hydrodynamic descriptions overlap. We find that for √sNN = 2.76 TeV central Pb-Pb collisions, the typical timescale when viscous hydrodynamics with shear viscosity over entropy ratio η/s = 0.16 becomes applicable is τhydro ~1 fm /c after the collision.},
doi = {10.1103/PhysRevC.99.034910},
journal = {Physical Review. C},
number = 3,
volume = 99,
place = {United States},
year = {Wed Mar 27 00:00:00 EDT 2019},
month = {Wed Mar 27 00:00:00 EDT 2019}
}
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https://doi.org/10.1103/PhysRevC.99.034910
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