Centrality and Energy Dependence of Elliptic Flow of Light Nuclei in STAR

摘要

Elliptic flow (υ2) of light nuclei (d, {- above letter d},t,~3 He and~3 {- above letter He}) has been measured at midrapidity for Au+Au collisions at {formula} = 200, 62.4, 39, 27, 19.6, 11.5 and 7.7 GeV. Mass ordering of nuclei υ_2 (P_T) at low p_T (P_T < 2.0 GeV/c) is reported. Strong centrality dependence is found for υ_2 of d and d for the measured energy range. Atomic mass scaling of nuclei υ_2 (P_T) is also observed.