phi and Omega production in relativistic heavy-ion collisions in a dynamical quark coalescence model RID A-2398-2009

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 phi mesons and Omega (Omega(-)+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 phi and Omega radii from fitting measured yields, we first study the ratio of the yield of Omega baryons to that of 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 phi mesons and Omega baryons are related to those of strange and antistrange quarks is then examined. The dependence of these results on phi and Omega radii as well as on the strange quark mass is also studied.