The elliptic flow of multi-strange hadrons in image Au + Au collisions at STAR

The measurement of the elliptic flow, image, provides a powerful tool for studying the properties of hot and dense medium created in high-energy nuclear collisions. We present the measurement of image of multi-strange hadrons (ϕ, Ξ and Ω) in image Au + Au collisions at STAR. In minimum-bias Au + Au collisions at image, a significant amount of elliptic flow, almost identical to other mesons and baryons, is observed for multi-strange hadrons. Experimental observations of image dependence of image of identified particles at RHIC support partonic collectivity. We also discuss the possible breaking of mass ordering of the ϕ mesons in the low image region.