Acoustic scaling of anisotropic flow in shape-engineered events: implications for extraction of the specific shear viscosity of the quark gluon plasma

Triangle Nuclear Theory Colloquium
Roy Lacey (Stonybrook)

It is shown that the acoustic scaling patterns of anisotropic flow for different event shapes at a fixed collision centrality (shape-engineered events), provide robust constraints for the event-by-event fluctuations in the initial-state density distribution from ultrarelativistic heavy ion collisions. The empirical scaling parameters also provide a dual-path method for extracting the specific shear viscosity eta/s of the quark-gluon plasma (QGP) produced in these collisions. A calibration of these scaling parameters via detailed viscous hydrodynamical model calculations, gives eta/s estimates for the plasma produced in collisions of Au+Au at RHIC and Pb+Pb at LHC. The estimates are insensitive to the initial-state geometry models considered.

Tuesday, March 25, 2014 - 3:30pm
Physics 298
Paul, Cristin