Speaker
Description
The study of the nucleon–nucleon (NN), hyperon–nucleon (YN) and hyperon–hyperon (YY) interactions is very important in understanding strong interactions, heavy-ion-collisions and neutron stars. Because of their unstable nature, it is hard to extract interactions between like N-$\Xi$or N-$\Omega$, and high energy collisions offer us a chance to further knowledge of those interactions by measuring correlation functions via femtoscopy.
In this talk I will give a brief review on $\Omega$-related correlation function measurement: p-$\Omega$ in pp collision at $\sqrt s =13 {\rm TeV}$ by ALICE in year 2020 and p-$\Omega$ in Au-Au collision by STAR at $\sqrt {s_{NN}} =200 {\rm GeV}$ in 2019. The source size, interaction type, and underlying bound state in p-$\Omega$ correlation are discussed. The results are also used to comparing with theoretical prediction made by HAL QCD, but more precise data is still needed to make a better constraint, to understand deeper $\Omega$ and also hyperon interactions.
