The Elliptic Flow of Multi-Strange Hadrons in √SNN = 200 GeV Au + Au Collisions at STAR

Azimuthal anisotropy, especially for the multi-strange hadrons, is expected to be sensitive to the dynamical evolution in the early stage of high energy nuclear collisions. In this paper we present the latest results of multi-strange hadron elliptic flow in Au + Au collisions at √SNN = 200 GeV from the STAR experiment at RHIC. The number-of-quark scaling is evidenced with φ(ss-bar) and Ω(sss) with highly statistical data, which shows strange quark collectivity at RHIC. The ν2 of φ meson is found to be consistent with that of proton within statistical error bars at pT < 1 GeV/c. (the 14th national conference on nuclear physics medium and high energy physics and hadron physics)