Saturation of elliptic flow and shear viscosity

Date
Authors
Chaudhuri, A. K.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
Effect of shear viscosity on elliptic flow is studied in causal dissipative hydrodynamics in 2+1 dimensions. Elliptic flow is reduced in viscous dynamics. Causal evolution of minimally viscous fluid ($\eta/s$=0.08), can explain the PHENIX data on elliptic flow in 16-23% Au+Au collisions up to $p_T\approx$3.6 GeV. In contrast, ideal hydrodynamics, can explain the same data only up to $p_T\approx$1.5 GeV. $p_T$ spectra of identified particles are also better explained in minimally viscous fluid than in ideal dynamics. However, saturation of elliptic flow at large $p_T$ is not reproduced.
Comment: In the revised version, viscous dynamics predictions for pT spectra of identified particles are shown. 4 pages, 2 figures
Keywords
Nuclear Theory
Citation
Collections