Evolution of elliptic and triangular flow as a function of collision energy in a hybrid model
Abstract
We study the collision energy dependence of elliptic flow v_2 and triangular flow v_3 in Au+Au collisions within the energy range sqrt(s_{NN}) = 5-200 GeV, utilizing a transport + hydrodynamics hybrid model. The transport part is described by the Ultrarelativistic Quantum Molecular Dynamics (UrQMD) approach, combined with an intermediate (3+1)-dimensional ideal hydrodynamical evolution phase using a chiral model equation of state. We find the decrease of v_2 produced by hydrodynamics at lower collision energies partially compensated by the transport dynamics. This does not apply to v_3, which falls to 0 in midcentral collisions at sqrt(s_{NN}) = 5 GeV. We conclude that the triangular flow provides the clearer signal for the formation of low-viscous fluid in heavy ion collisions.
Cite
@article{arxiv.1310.1764,
title = {Evolution of elliptic and triangular flow as a function of collision energy in a hybrid model},
author = {Jussi Auvinen and Hannah Petersen},
journal= {arXiv preprint arXiv:1310.1764},
year = {2014}
}
Comments
15 pages, 9 figures. Text and figures updated to correspond with the published version