A resummed method of moments for the relativistic hydrodynamic expansion

L. Tinti, G. Vujanovic, J. Noronha, U. Heinz

Research output: Contribution to journalArticle

Abstract

The relativistic method of moments is one of the most successful approaches to extract second order viscous hydrodynamics from a kinetic underlying background. The equations can be systematically improved to higher order, and they have already shown a fast convergence to the kinetic results. In order to generalize the method we introduced long range effects in the form of effective (medium dependent) masses and gauge (coherent) fields. The most straightforward generalization of the hydrodynamic expansion is problematic at higher order. Instead of introducing an additional set of approximations, we propose to rewrite the series in terms of moments resumming the contributions of infinite non-hydrodynamics modes. The resulting equations are are consistent with hydrodynamics and well defined at all order. We tested the new approximation against the exact solutions of the Maxwell-Boltzmann-Vlasov equations in (0 + 1)-dimensions, finding a fast and stable convergence to the exact results.

Original languageEnglish (US)
Pages (from-to)919-922
Number of pages4
JournalNuclear Physics A
Volume982
DOIs
StatePublished - Feb 2019
Externally publishedYes

Keywords

  • Boltzmann-Vlasov equation
  • electro-magnetic plasma
  • LHC
  • relativistic heavy-ion collisions
  • RHIC
  • viscous hydrodynamics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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