Intrinsic ambiguity in second order viscosity parameters in relativistic hydrodynamics

Abstract

We show that relativistic hydrodynamics in Minkowski space-time has intrinsic ambiguity in second order viscosity parameters in the Landau-Lifshitz frame. This stems from the possibility of improvements of energy-momentum tensor. There exist at least two viscosity parameters which can be removed by using this ambiguity in scale invariant hydrodynamics in (1+3) dimension, and seemingly non-conformal hydrodynamic theories can be hiddenly conformal invariant.

5 pages

References in corpus (2)

• Dissipative relativistic fluid dynamics: a new way to derive the equations of motion from kinetic theory
• Relativistic Dissipative Hydrodynamics: A Minimal Causal Theory