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

Lie-Wen Chen·Che Ming Ko
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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 $ϕ$ mesons and $Ω$ ($Ω^{-}+\barΩ^{+}$) 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 $ϕ$ 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 above results on $ϕ$ and $Ω$ radii as well as on the strange quark mass is also studied.

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Lie-Wen Chen, Che Ming Ko. 2006-04-06. $ϕ$ and $Ω$ production in relativistic heavy ion collisions in a dynamical quark coalescence model. https://doi.org/10.1103/physrevc.73.044903

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