2013/03/31 by M. Ruggieri, F. Scardina, S. Plumari +1 · 1 citation
Physics and Astronomy · #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.physletb.2013.10.014
6 pages, 4 figures. // Title changed, some discussion added, main conclusions unchanged. Version accepted for publication on Phys. Lett. B
arxiv created 2013/10/24 · arxiv updated 2015/06/15
A current goal of relativistic heavy ion collisions experiments is the search for a Color Glass Condensate as the limiting state of QCD matter at very high density. In viscous hydrodynamics simulations, a standard Glauber initial condition leads to estimate 4πη/s ∼ 1, while a Color Glass Condensate modeling leads to at least a factor of 2 larger η/s. Within a kinetic theory approach based on a relativistic Boltzmann-like transport simulation, we point out that the out-of-equilibrium initial distribution proper of a Color Glass Condensate reduces the efficiency in building-up the elliptic flow. Our main result at RHIC energy is that the available data on v2 are in agreement with a 4πη/s ∼ 1 also for Color Glass Condensate initial conditions, opening the possibility to describe self-consistently also higher order flow, otherwise significantly underestimated, and to pursue further the search for signatures of the Color Glass Condensate.