Speaker
Vincenzo Greco
(University of Catania)
Description
A current goal of relativistic heavy ion collisions experiments
is the search for a Color Glass Condensate (CGC) as the limiting state of QCD matter at very high density.
In viscous hydrodynamics simulations, a standard Glauber initial condition leads to estimate $4\pi \eta/s \sim 1$, while employing the Kharzeev-Levin-Nardi (KLN) modeling of the glasma leads to at least a factor of 2 larger $\eta/s$.
Within a kinetic theory approach based on a relativistic Boltzmann-like transport simulation, our main result is that the out-of-equilibrium initial distribution reduces the efficiency in building-up the elliptic flow.
At RHIC energy we find the available data on $v_2$ are in agreement with a $4\pi \eta/s \sim 1$ also for KLN initial conditions.
More generally, our study shows that the initial non-equilibrium in p-space can have a significant impact on the build-up of anisotropic flow.
Primary author
Vincenzo Greco
(University of Catania)
Co-author
Marco Ruggieri
(University of Catania)
