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Title: Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions

Journal Article · · Physical Review. C
 [1];  [2];  [3];  [4];  [5]
  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Stavanger (Norway)
  2. Univ. Heidelberg (Germany); Stony Brook Univ., NY (United States)
  3. Duke Univ., Durham, NC (United States); Stony Brook Univ., NY (United States)
  4. Univ. Bielefeld (Germany); Univ. of Washington, Seattle, WA (United States)
  5. Stony Brook Univ., NY (United States)
+ Show Author Affiliations

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.

Research Organization:
Duke Univ., Durham, NC (United States); State Univ. of New York (SUNY), Albany, NY (United States); Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-05ER41367; FG02-88ER40388; FG02-97ER41014
OSTI ID:
1503381
Alternate ID(s):
OSTI ID: 1609636
Journal Information:
Physical Review. C, Vol. 99, Issue 3; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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  • Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) https://doi.org/10.22323/1.336.0152
conference September 2019
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Thermalization of a color glass condensate and review of the ‘bottom-up’ scenario journal September 2008
Free-streaming approximation in early dynamics of relativistic heavy-ion collisions text January 2008
The Color Glass Condensate text January 2010
Gluon spectrum in the glasma from JIMWLK evolution text January 2011
Mapping the hydrodynamic response to the initial geometry in heavy-ion collisions text January 2011
Derivation of transient relativistic fluid dynamics from the Boltzmann equation text January 2012
Fluctuating Glasma initial conditions and flow in heavy ion collisions text January 2012
Lectures on hydrodynamic fluctuations in relativistic theories text January 2012
Non linearities in the harmonic spectrum of heavy ion collisions with ideal and viscous hydrodynamics text January 2012
Event-by-event anisotropic flow in heavy-ion collisions from combined Yang-Mills and viscous fluid dynamics text January 2012
Collective flow and viscosity in relativistic heavy-ion collisions text January 2013
Hydrodynamic Modeling of Heavy-Ion Collisions text January 2013
Hydrodynamic gradient expansion in gauge theory plasmas text January 2013
Turbulent thermalization process in heavy-ion collisions at ultrarelativistic energies text January 2013
A fully dynamical simulation of central nuclear collisions text January 2013
Mode-by-mode fluid dynamics for relativistic heavy ion collisions text January 2013
On the relative importance of second-order terms in relativistic dissipative fluid dynamics text January 2013
Universal attractor in a highly occupied non-Abelian plasma text January 2013
Initial State Fluctuations and Final State Correlations in Relativistic Heavy-Ion Collisions text January 2013
Self-consistent conversion of a viscous fluid to particles text January 2014
Studying the validity of relativistic hydrodynamics with a new exact solution of the Boltzmann equation text January 2014
Alternative ansatz to wounded nucleon and binary collision scaling in high-energy nuclear collisions text January 2014
Subleading harmonic flows in hydrodynamic simulations of heavy ion collisions text January 2015
Quantifying properties of hot and dense QCD matter through systematic model-to-data comparison text January 2015
Pre-equilibrium evolution effects on heavy-ion collision observables preprint January 2015
Isotropization and hydrodynamization in weakly coupled heavy-ion collisions text January 2015
Sensitivity of flow harmonics to sub-nucleon scale fluctuations in heavy ion collisions text January 2015
Towards a Deeper Understanding of How Experiments Constrain the Underlying Physics of Heavy-Ion Collisions text January 2015
The production of photons in relativistic heavy-ion collisions text January 2015
Weak and strong coupling equilibration in nonabelian gauge theories text January 2015
Non-Gaussian eccentricity fluctuations text January 2016
Hydrodynamization in kinetic theory: Transient modes and the gradient expansion text January 2016
Relativistic Hydrodynamic Attractors with Broken Symmetries: Non-Conformal and Non-Homogeneous text January 2017
An Impact Parameter Dipole Saturation Model text January 2003
Thermalization of gluons in ultrarelativistic heavy ion collisions by including three-body interactions in a parton cascade text January 2004
Some Features of the Glasma text January 2006
Glauber Modeling in High Energy Nuclear Collisions text January 2007

Cited By (7)

Flow in AA and pA as an interplay of fluid-like and non-fluid like excitations journal November 2019
Entropy production in p p and Pb-Pb collisions at energies available at the CERN Large Hadron Collider journal December 2019
Bayesian estimation of the specific shear and bulk viscosity of quark–gluon plasma journal August 2019
Flow in AA and pA as an interplay of fluid-like and non-fluid like excitations text January 2019
Entropy production in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider text January 2019
Hydrodynamic attractors, initial state energy and particle production in relativistic nuclear collisions text January 2019
Initial conditions of bulk matter in ultrarelativistic nuclear collisions preprint January 2019

Figures / Tables (28)

FIG. 1(p. 3)figure FIG. 1
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TABLE I(p. 14)table TABLE I
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FIG. 26(p. 32)figure FIG. 26
FIG. 27(p. 33)figure FIG. 27

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