Parton collisional effect on the conversion of geometry eccentricities into momentum anisotropies in relativistic heavy-ion collisions
Abstract
We explore parton collisional effects on the conversion of geometry eccentricities into azimuthal anisotropies in Pb+Pb collisions at sNN = 5.02 TeV using a multi-phase transport model. The initial eccentricity n (n = 2,3) and flow harmonics vn (n = 2,3) are investigated as a function of the number of parton collisions (Ncoll) during the source evolution of partonic phase. It is found that partonic collisions leads to generate elliptic flow v2 and triangular flow v3 in Pb+Pb collisions. On the other hand, partonic collisions also result in an evolution of the eccentricity of geometry. The collisional effect on the flow conversion efficiency is therefore studied. We find that the partons with larger Ncoll show a lower flow conversion efficiency, which reflect differential behaviors with respect to Ncoll. It provides an additional insight into the dynamics of the space-momentum transformation during the QGP evolution from a transport model point of view.