Initial conditions for hydrodynamics from kinetic theory equilibration

doi:10.1016/j.nuclphysa.2017.04.009

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:

Kurkela, Aleksi ^[1]; Mazeliauskas, Aleksas ^[2]; Paquet, Jean -François ^[3]; Schlichting, Sören ^[4]; Teaney, Derek ^[3]

European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Stavanger, Stavanger (Norway)
Stony Brook Univ., Stony Brook, NY (United States); Univ. Heidelberg, Heidelberg (Germany)
Stony Brook Univ., Stony Brook, NY (United States)
Univ. of Washington, Seattle, WA (United States)

Publication Date:: 2017-09-25

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) (SC-26)

OSTI Identifier:: 1502376

Grant/Contract Number:: [FG02-88ER40388; FG02-97ER41014]

Resource Type:: 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.

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                    Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean -François, Schlichting, Sören, & Teaney, Derek. Initial conditions for hydrodynamics from kinetic theory equilibration.  United States.  doi:10.1016/j.nuclphysa.2017.04.009.

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                    Kurkela, Aleksi, Mazeliauskas, Aleksas, Paquet, Jean -François, Schlichting, Sören, and Teaney, Derek. Mon .  
        "Initial conditions for hydrodynamics from kinetic theory equilibration".  United States.  doi:10.1016/j.nuclphysa.2017.04.009.  https://www.osti.gov/servlets/purl/1502376.

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@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},

  journal      = {Nuclear Physics. A},

  number       = [C],

  volume       = [967],

  place        = {United States},

  year         = {2017},

  month        = {9}

}

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Journal Article:

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DOI: 10.1016/j.nuclphysa.2017.04.009

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Cited by: 3 works

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Figures / Tables:

Fig. 1. : (a) Energy density decomposition to the average and perturbations within a causal circle |x−x₀ | < $c$($τ$_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$πη$/$s$), where T_∞($τ$) ≡ 1/$τ$^1/3 lim_$τ$→∞($τ$^1/3$T$($τ$)). At earlymore »

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