Matching the Nonequilibrium Initial Stage of Heavy Ion Collisions to Hydrodynamics with QCD Kinetic Theory

Kurkela, Aleksi; Mazeliauskas, Aleksas; Paquet, Jean-François; Schlichting, Sören; Teaney, Derek

doi:10.1103/physrevlett.122.122302

Title: Matching the Nonequilibrium Initial Stage of Heavy Ion Collisions to Hydrodynamics with QCD Kinetic Theory

Journal Article · 27 March 2019 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.122.122302 · OSTI ID:1503387

Kurkela, Aleksi ^[1]; Mazeliauskas, Aleksas ^[2]; Paquet, Jean-François ^[3]; Schlichting, Sören ^[4]; Teaney, Derek ^[5]

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

High-energy nuclear collisions produce a nonequilibrium plasma of quarks and gluons which thermalizes and exhibits hydrodynamic flow. There are currently no practical frameworks to connect the early particle production in classical field simulations to the subsequent hydrodynamic evolution. We build such a framework using nonequilibrium Green’s functions, calculated in QCD kinetic theory, to propagate the initial energy-momentum tensor to the hydrodynamic phase. We demonstrate that this approach can be easily incorporated into existing hydrodynamic simulations, leading to stronger constraints on the energy density at early times and the transport properties of the QCD medium. Based on (conformal) scaling properties of the Green’s functions, we further obtain pragmatic bounds for the applicability of hydrodynamics in nuclear collisions.

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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:: 1503387

Alternate ID(s):: OSTI ID: 1609637

Journal Information:: Physical Review Letters, Vol. 122, Issue 12; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 92 works

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