Instabilities of an anisotropically expanding non-Abelian plasma: 3D+3V discretized hard-loop simulations

Maximilian Attems, Anton Rebhan, and Michael Strickland
Phys. Rev. D 87, 025010 – Published 3 January 2013

Abstract

We study the (3+1)-dimensional evolution of non-Abelian plasma instabilities in the presence of a longitudinally expanding background of hard particles using the discretized hard-loop framework. The free streaming background dynamically generates a momentum-space anisotropic distribution which is unstable to the rapid growth of chromomagnetic and chromoelectric fields. These fields produce longitudinal pressure that works to isotropize the system. Extrapolating our results to energies probed in ultrarelativistic heavy-ion collisions we find, however, that a pressure anisotropy persists for a few fm/c. In addition, on time scales relevant to heavy-ion collisions we observe continued growth of plasma instabilities in the strongly non-Abelian regime. Finally, we find that the longitudinal energy spectrum is well described by a Boltzmann distribution with increasing temperature at intermediate time scales.

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  • Received 11 September 2012

DOI:https://doi.org/10.1103/PhysRevD.87.025010

© 2013 American Physical Society

Authors & Affiliations

Maximilian Attems1, Anton Rebhan1, and Michael Strickland2,3

  • 1Institut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria
  • 2Physics Department, Gettysburg College, Gettysburg, Pennsylvania 17325, USA
  • 3Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, D-60438, Frankfurt am Main, Germany

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Issue

Vol. 87, Iss. 2 — 15 January 2013

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