Linear and cubic response to the initial eccentricity in heavy-ion collisions

• DOI: 10.1103/physrevc.93.014909
• Publication Date: 2016-01-25T07:46:19Z
• Authors: Jacquelyn Noronha...; Li Yan; Fernando G. Gardim; Jean-Yves Ollitrault
• Keywords: Eccentricity (behavior); Elliptic flow; Linear scale

We study the relation between elliptic flow, ${v}_{2}$, and initial eccentricity, ${\ensuremath{\varepsilon}}_{2}$, in heavy-ion collisions, using hydrodynamic simulations. Significant deviations from linear eccentricity scaling are seen more peripheral collisions. identify mechanism responsible for these as a cubic response, which we argue is generic property of response to density profile. The increases flow fluctuations, thereby improving agreement condition models with experimental data.