Influence of Shear Viscosity of Quark-Gluon Plasma on Elliptic Flow in Ultrarelativistic Heavy-Ion Collisions

H. Niemi, G. S. Denicol, P. Huovinen, E. Molnár, D. H. Rischke
2011 Physical Review Letters  
We investigate the influence of a temperature-dependent shear viscosity over entropy density ratio eta/s on the transverse momentum spectra and elliptic flow of hadrons in ultrarelativistic heavy-ion collisions. We find that the elliptic flow in sqrt(s_NN) = 200 GeV Au+Au collisions at RHIC is dominated by the viscosity in the hadronic phase and in the phase transition region, but largely insensitive to the viscosity of the quark-gluon plasma (QGP). At the highest LHC energy, the elliptic flow
more » ... ecomes sensitive to the QGP viscosity and insensitive to the hadronic viscosity.
doi:10.1103/physrevlett.106.212302 pmid:21699292 fatcat:oegxionnafhlvcibogf4ja2are