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

作者：Lacey, Roy A.^*; Reynolds, D.; Taranenko, A.; Ajitanand, N. N.; Alexander, J. M.; Liu, Fu-Hu; Gu, Yi; Mwai, A.

来源：Journal of Physics G: Nuclear and Particle Physics , 2016, 43(10): 10LT01.

DOI：10.1088/0954-3899/43/10/10LT01

• anisotropic flow
• event engineering
• specific viscosity
• quark-gluon plasma

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)(QGP) 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)(QGP) estimates for the plasma produced in collisions of Au + Au (root sNN = 0.2 TeV) and Pb + Pb (root sNN = 2.76 TeV). The estimates are insensitive to the initial-state geometry models considered.

• 出版日期2016-10
• 单位山西大学