Azimuthal anisotropy of φ meson in U+U and Au+Au collisions at RHIC

The measurements of the azimuthal anisotropy of φ meson in the U+U and Au+Au collisions at the Relativistic Heavy-Ion Collider (RHIC) are reported. The centrality dependence of the Fourier coefficients v2, v3, v4 and v5 is presented for φ meson at midrapidity (|η| ≤ 1.0), in U+U and Au+Au collisions at sNN = 193 and 200 GeV, respectively. The η-sub event plane method is used with a η gap of 0.1 to suppress the non-flow effects. A strong centrality dependence is observed for the φ meson elliptic flow (v2), whereas no clear centrality dependence is observed for v3, v4 and v5. Ratios of the Fourier coefficients, v3/v2 and v4/v 2 as a function of transverse momentum (pT ) are also presented. A systematic comparison of the Fourier coefficients for the two systems U+U and Au+Au is discussed.