Recent progress on antimatter and exotic strange particles study at RHIC

Abstract

We introduce the recent progress on antimatter and exotic strange dibaryon study from our group. The main contents include two parts: we measure the interactions between antimatters via antiprotons correlations in relativistic heavy-ion colliders. The results suggest that there is a strong attraction between antiprotons, enough to overcome the Coulomb repulsive force between antiprotons, combined into antimatter nucleus. We measure the interactions between proton-Ω and their antiparticle pairs via two particle correlations to search for a possible p-Ω diabryon. Our results, in comparison with LQCD prediction, slightly favors a proton-Ω bound system with a binding energy of ~ 27 MeV. Our value is much larger than the binding energy of proton and neutron in a deuteron.