ϕ and Ω production in relativistic heavy-ion collisions in a dynamical quark coalescence model

Based on the phase-space information obtained from a multiphase transport model within the string-melting scenario for strange and antistrange quarks, we study the yields and transverse-momentum spectra of ϕ mesons and Ω (Ω^-+Ω̅ ⁺) baryons and their anisotropic flows in Au + Au collisions at RHIC using a dynamical quark coalescence model that includes the effect from quark phase-space distributions inside hadrons. With current quark masses and fixing the ϕ and Ω radii from fitting measured yields, we first study the ratio of the yield of Ω baryons to that of ϕ mesons as well as their elliptic and fourth-order flows as functions of their transverse momentum. How the elliptic and fourth-order flows of ϕ mesons and Ω baryons are related to those of strange and antistrange quarks is then examined. The dependence of these results on ϕ and Ω radii as well as on the strange quark mass is also studied.