$\ddot{I}•$ and $\hat{I}\text{c◯}$ production in relativistic heavy ion collisions in a dynamical quark coalescence model

Abstract

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

15 pages, 18 figures, Title changed, revised version to appear in PRC