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Turbulent thermalization process in heavy-ion collisions at ultrarelativistic energies

J. Berges1,2, K. Boguslavski1, S. Schlichting3,*, and R. Venugopalan3

  • 1Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany
  • 2ExtreMe Matter Institute (EMMI), GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
  • 3Physics Department, Brookhaven National Laboratory, Building 510A, Upton, New York 11973, USA

  • *soeren@kaiden.de
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Phys. Rev. D 89, 074011 – Published 3 April, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.074011

Abstract

The nonequilibrium evolution of heavy-ion collisions is studied in the limit of weak coupling at very high energy employing lattice simulations of the classical Yang-Mills equations. Performing the largest classical-statistical simulations to date, we find that the dynamics of the longitudinally expanding plasma becomes independent of the details of the initial conditions. After a transient regime dominated by plasma instabilities and free streaming, the subsequent space-time evolution is governed by a nonthermal fixed point, where the system exhibits the self-similar dynamics characteristic of wave turbulence. This allows us to distinguish between different kinetic scenarios in the classical regime. Within the accuracy of our simulations, the scaling behavior found is consistent with the “bottom-up” thermalization scenario [R. Baier, A. H. Mueller, D. Schiff, and D. T. Son, Phys. Lett. B 502, 51 (2001)].

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See Also

Universal attractor in a highly occupied non-Abelian plasma

J. Berges, K. Boguslavski, S. Schlichting, and R. Venugopalan
Phys. Rev. D 89, 114007 (2014)

Article Text

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Phys. Rev. D 89, 074011– Published 3 April, 2014
  • Received 31 March 2013

© 2014 American Physical Society

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