# Quark Matter 2015 - XXV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

27 September 2015 to 3 October 2015
Kobe, Fashion Mart, Japan
Japan timezone

## Hydrodynamic evolution of the event-by-event fluctuating initial state

29 Sep 2015, 16:30
2h
Exhibition space 3 & 4 ()

### Exhibition space 3 & 4

Board: 0817
Poster Collective Dynamics

### Speaker

Roy Lacey (Stony Brook University)

### Description

In high energy heavy ion collisions of RHIC and LHC, a strongly interacting quark gluon plasma (sQGP) is created. Due to the finite number of nucleons, the initial distribution fluctuates on an event-by-event basis. This medium undergoes a hydrodynamic evolution, before it freezes out to form a hadronic matter. In the last years it has been revealed that if measuring relative to higher order event planes $\Psi_n$, higher order flow coefficients $v_n$ for $n>2$ can be measured. It also turned out that Bose-Einstein (HBT) correlation radii also show 3rd order oscillations if measured versus the third order event plane $\Psi_3$. The initial transverse plane anisotropy causing these phenomena can be translated into a series of anisotropy coefficients or eccentricities: $\epsilon_2$, $\epsilon_3$, $\epsilon_4$, etc. These anisotropies then evolve in time, and result in measurable momentum-space anisotropies, to be measured with respect to their respective symmetry planes. In our work we investigate the time evolution of the asymmetries and the mixing of spatial and momentum space anisotropies via numerical viscous hydrodynamics and via analytic solutions.
On behalf of collaboration: NONE