Stress tensor and bulk viscosity in relativistic nuclear collisions

2008/07/31 by Rainer J. Fries, Berndt Müller, Andreas Schäfer · 3 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1103/physrevc.78.034913

published as Phys.Rev.C78:034913,2008

arxiv created 2008/08/30 · openalex publication_date 2008/09/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

We discuss the influence of different initial conditions for the stress tensor and the effect of bulk viscosity on the expansion and cooling of the fireball created in relativistic heavy ion collisions. In particular, we explore the evolution of longitudinal and transverse components of the pressure and the extent of dissipative entropy production in the one-dimensional, boost-invariant hydrodynamic model. We find that a bulk viscosity consistent with recent estimates from lattice QCD further slows the equilibration of the system; however, it does not significantly increase the entropy produced.

Citations

• Decoherence time in high energy heavy ion collisions
• Nonstationary irreversible thermodynamics: A causal relativistic theory
• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics

Cited by

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• Cavitation and thermal dilepton production in QGP
• PHOTON EMISSION FROM OUT OF EQUILIBRIUM DISSIPATIVE PARTON PLASMA