Diomega production in relativistic heavy ion collisions

الأصل · EN

Using a multiphase transport model, we study the production of a new strange dibaryon (ΩΩ)₀₊ in dense hadronic matter formed in relativistic heavy ion collisions. The (multi-)strange baryons (Ξand Ω) are produced by strangeness-exchange reactions between antikaons and hyperons in the pure hadronic phase. The rescattering between the omegas at midrapidity leads to a production probability of ≃ 3x10⁻⁷ (ΩΩ)₀₊ per event at the RHIC energy of √ s=130A GeV. The production probability would be enhanced by two orders of magnitude if (ΩΩ)₀₊ and omega reach chemical equilibrium during heavy ion collisions. We further find that the yield of (ΩΩ)₀₊ increases continuously from SPS to the highest RHIC energy.