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 (|ƞ| < 1.0), in U+U and Au+Au collisions at -√8_NN = 193 and 200 GeV, respectively. The ƞ-sub event plane method is used with a n 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/v²₂ as a function of transverse momentum (p_T) are also presented. A systematic comparison of the Fourier coefficients for the two systems U+U and Au+Au is discussed. (paper)