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Azimuthal anisotropy of K0S and Λ + ? production at midrapidity from Au + Au collisions at √sNN = 130 GeV

We report STAR results on the azimuthal anisotropy parameter v 2 for strange particles K 0 S , Λ, and Λ at midrapidity in Au + Au collisions at s N N = 130 GeV at the Relativistic Heavy Ion Collider. The value of v 2 as a function of transverse momentum, p t , of the produced particle and collision centrality is presented for both particles up to p t ∼ 3.0 GeV/c. A strong p t dependence in v 2 is observed up to 2.0 GeV/c. The v 2 measurement is compared with hydrodynamic model calculations. The physics implications of the p t integrated v 2 magnitude as a function of particle mass are also discussed.