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Title: Initial conditions for hydrodynamics from kinetic theory equilibration

Abstract

Here we use effective kinetic theory to study the pre-equilibrium dynamics in heavy-ion collisions. We describe the evolution of linearized energy perturbations on top of out-of-equilibrium background to the energy-momentum tensor at a time when hydrodynamics becomes applicable. We apply this description to IP-Glasma initial conditions and find an overall smooth transition to hydrodynamics. In a phenomenologically favorable range of η/s values, early time dynamics can be accurately described in terms of a few functions of a scaled time variable τT/(η/s). Our framework can be readily applied to other initial state models to provide the pre-equilibrium dynamics of the energy momentum tensor.

Authors:
 [1];  [2];  [3];  [4];  [3]
  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Stavanger, Stavanger (Norway)
  2. Stony Brook Univ., Stony Brook, NY (United States); Univ. Heidelberg, Heidelberg (Germany)
  3. Stony Brook Univ., Stony Brook, NY (United States)
  4. Univ. of Washington, Seattle, WA (United States)
Publication Date:
Research Org.:
The State Univ. of New York, Stony Brook, NY (United States); Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1502376
Grant/Contract Number:  
FG02-88ER40388; FG02-97ER41014
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 967; Journal Issue: C; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Quark Gluon Plasma; heavy ion collisions; bottom-up thermalization; effective kinetic theory

Citation Formats

Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean -François, Schlichting, Sören, and Teaney, Derek. Initial conditions for hydrodynamics from kinetic theory equilibration. United States: N. p., 2017. Web. doi:10.1016/j.nuclphysa.2017.04.009.
Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean -François, Schlichting, Sören, & Teaney, Derek. Initial conditions for hydrodynamics from kinetic theory equilibration. United States. https://doi.org/10.1016/j.nuclphysa.2017.04.009
Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean -François, Schlichting, Sören, and Teaney, Derek. Mon . "Initial conditions for hydrodynamics from kinetic theory equilibration". United States. https://doi.org/10.1016/j.nuclphysa.2017.04.009. https://www.osti.gov/servlets/purl/1502376.
@article{osti_1502376,
title = {Initial conditions for hydrodynamics from kinetic theory equilibration},
author = {Kurkela, Aleksi and Mazeliauskas, Aleksas and Paquet, Jean -François and Schlichting, Sören and Teaney, Derek},
abstractNote = {Here we use effective kinetic theory to study the pre-equilibrium dynamics in heavy-ion collisions. We describe the evolution of linearized energy perturbations on top of out-of-equilibrium background to the energy-momentum tensor at a time when hydrodynamics becomes applicable. We apply this description to IP-Glasma initial conditions and find an overall smooth transition to hydrodynamics. In a phenomenologically favorable range of η/s values, early time dynamics can be accurately described in terms of a few functions of a scaled time variable τT/(η/s). Our framework can be readily applied to other initial state models to provide the pre-equilibrium dynamics of the energy momentum tensor.},
doi = {10.1016/j.nuclphysa.2017.04.009},
url = {https://www.osti.gov/biblio/1502376}, journal = {Nuclear Physics. A},
issn = {0375-9474},
number = C,
volume = 967,
place = {United States},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 3 works
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Figures / Tables:

Fig. 1. Fig. 1. : (a) Energy density decomposition to the average and perturbations within a causal circle |x−x 0 | < $$c$$($$τ$$ init−$$τ$$ 0), which determines the system response at ($$τ$$ init, $$x$$ 0). (b) Kinetic theory equilibration of boost invariant background energy density in scaled time units $$τ$$T /(4$πη$$/$$s$), wheremore » T ($$τ$$) ≡ 1/$$τ$$ 1/3 lim $$τ$$→∞($$τ$$ 1/3$$T$$($$τ$$)). At early times the expansion resembles free streaming, but at late times the evolution agrees with the hydrodynamic gradient expansion given in Eq. (3)« less

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Works referencing / citing this record:

Effects of initial-state dynamics on collective flow within a coupled transport and viscous hydrodynamic approach
journal, March 2018


Linearly polarized gluons and axial charge fluctuations in the glasma
journal, February 2018


    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.