Initial Stages 2019

Investigation of the linear and mode-coupled flow harmonics in Au+Au collisions at sNN = 200 GeV

25 Jun 2019, 16:02

1m

8th floor Theory Center (Pupin)

Poster Initial conditions for hydrodynamics & transport coefficients Posters

Speaker

Dr Niseem Abdelrahman (Department of Physics, University of Illinois at Chicago, Chicago)

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, ${ϵ}_2$ and ${ϵ}_3$, respectively. However, the higher order flow coefficients, $v_n$ (n $>$ 3), are comprised of linear contributions driven by ${ϵ}_n$, 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.