$\Omega^-$ production as a probe of equation of state of dense matter near the QCD phase transition in relativistic heavy-ion collisions

Abstract

Based on a relativistic transport model coupled with hadronic mean-field potentials for heavy-ion collisions, the productions of doubly strange hyperon $\Xi^-$ and trebly strange hyperon $\Omega^-$ in relativistic Au+Au collisions at $\sqrt{s_{NN}}$ = 4.2 GeV are investigated. Compared with the double strangeness sensitive observable $\Xi^-$, the treble strangeness $\Omega^-$, whether its yields or its collective flows, is extremely sensitive to the equation of state (EoS) of dense matter, making it a valuable observable for probing the properties of dense matter formed in relativistic heavy-ion collisions.Comment: 5 pages, 5 figure