Including off-diagonal anisotropies in anisotropic hydrodynamics
Abstract
In this paper we present a method for efficiently including the effects of off-diagonal local rest frame momentum anisotropies in leading-order anisotropic hydrodynamics. The method relies on diagonalization of the space-like block of the anisotropy tensor and allows one to reduce the necessary moments of the distribution function in the off-diagonal case to a linear combination of diagonal-anisotropy integrals. Once reduced to diagonal-anisotropy integrals, the results can be computed efficiently using techniques described previously in the literature. We present a general framework for how to accomplish this and provide examples for off-diagonal anisotropy moments entering into the energy-momentum tensor and viscous update equations which emerge when performing anisotropic pressure matching.
Cite
@article{arxiv.1902.03303,
title = {Including off-diagonal anisotropies in anisotropic hydrodynamics},
author = {Mohammad Nopoush and Michael Strickland},
journal= {arXiv preprint arXiv:1902.03303},
year = {2019}
}
Comments
17 pages; v3 - improvement made to discussion