Saturation of elliptic flow and shear viscosity

2007/08/09 by A. K. Chaudhuri, Chaudhuri, A. K.
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #nucl-th

paper · pdf · doi:10.48550/arxiv.0708.1252

In the revised version, viscous dynamics predictions for pT spectra of identified particles are shown. 4 pages, 2 figures

openalex publication_date 2007/08/09 · arxiv created 2007/10/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 (η/s=0.08), can explain the PHENIX data on elliptic flow in 16-23% Au+Au collisions up to p_T≈3.6 GeV. In contrast, ideal hydrodynamics, can explain the same data only up to p_T≈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.

Related

• Suppression of elliptic flow without viscosity
• The "minimal" viscosity and elliptic flow at RHIC
• Elliptic flow orientation, saturation and low p_t behavior
• Viscous fluid dynamics in Au+Au collisions at RHIC
• Dissipative hydrodynamics in 2+1 dimensions