Elliptic flow of Ï-meson a sensitive probe for onset of de-confinement transition in high energy heavy-ion collisions
arXiv:1301.1375 · doi:10.1103/PhysRevC.87.014903
Abstract
Elliptic flow (v_2) of Ï-meson is shown to be a sensitive probe of the partonic collectivity using A Multi Phase Transport (AMPT) model. Within the ambit of the AMPT model with partonic interactions (string melting version), the Ï-meson v_2 at midrapidity is found to have negligible contribution from hadronic interactions for Au+Au collisions at 200 GeV per nucleon. Changing the hadron cascade time in the model calculations does not change the Ï-meson v_2, while it reduces the v_2 of proton at low transverse momentum (pT). These observations indicate that a substantial reduction in Ï-mesons v_2 as a function of colliding beam energy would suggest the dominance of hadronic interactions over partonic interactions.
5 pages and 4 figures. Accepted for publication in Physical Review C