Speaker
Description
The elliptic and triangular flow coefficients, $v_{2}$ and $v_{3}$, are expected to be driven by the initial anisotropy coefficients of the same order, $\epsilon_{2}$ and $\epsilon_{3}$, respectively. However, the higher order flow coefficients, $v_{n}$ (n $>$ 3), are comprised of linear contributions driven by $\epsilon_{n}$, as well as mode-coupled contributions derived from the lower order coefficients. The study of these disparate contributions to $v_{n}$ can give important insight to discern initial-state models and to constrain the temperature-dependent specific shear viscosity, $\frac{\eta}{s}(T)$. In recent work, we have made detailed measurements of both the linear and the mode-coupled coefficients, $v_{n}$ (n=4,5), in Au+Au collisions ($\sqrt{s_{NN}}$ =200 GeV) using 2- and multi-particle correlations based on the standard and subevent cumulant methods. These measurements will be presented as a function of centrality, $p_{T}$ and particle species. The comparisons to the LHC measurements and different theoretical calculations will be presented. The implications of these comparisons for initial-state models and $\frac{\eta}{s}(T)$ will be discussed.
