Title: ϕ and Ω production in relativistic heavy-ion collisions in a dynamical quark coalescence model
Abstract: 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 $\ensuremath{\phi}$ mesons and $\ensuremath{\Omega}$ (${\ensuremath{\Omega}}^{\ensuremath{-}}+{\overline{\ensuremath{\Omega}}}^{+}$) 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 $\ensuremath{\phi}$ and $\ensuremath{\Omega}$ radii from fitting measured yields, we first study the ratio of the yield of $\ensuremath{\Omega}$ baryons to that of $\ensuremath{\phi}$ mesons as well as their elliptic and fourth-order flows as functions of their transverse momentum. How the elliptic and fourth-order flows of $\ensuremath{\phi}$ mesons and $\ensuremath{\Omega}$ baryons are related to those of strange and antistrange quarks is then examined. The dependence of these results on $\ensuremath{\phi}$ and $\ensuremath{\Omega}$ radii as well as on the strange quark mass is also studied.