v4 for identified particles at RHIC from viscous hydrodynamics
Nuclear Theory
2011-02-18 v1 High Energy Physics - Phenomenology
Abstract
Using ideal and viscous hydrodynamics, the ratio of azimuthal moments v4/(v2)^2 is calculated for pions, protons, and kaons in sqrt{s}=200 A*GeV Au+Au collisions. For any value of viscosity here is little dependence on particle species. Ideal hydrodynamics and data show a flat curve as a function of pt. Adding viscosity in the standard way destroys this flatness. However, it can be restored by replacing the standard quadratic ansatz for delta f (the viscous correction to the distribution function at freeze-out) with a weaker momentum dependence.
Cite
@article{arxiv.1009.6056,
title = {v4 for identified particles at RHIC from viscous hydrodynamics},
author = {Matthew Luzum},
journal= {arXiv preprint arXiv:1009.6056},
year = {2011}
}
Comments
Proceedings of Hot Quarks 2010, 21-26 June 2010 La Londe Les Maures, 4 pages, 2 figures