Production of $ΩNN$ and $ΩΩN$ in ultra-relativistic heavy ion collisions

Abstract

Even though lots of Λ-hypernuclei have been found and measured, multi-strangeness hypernuclei consisting of Ω are not yet discovered. The studies of multi-strangeness hypernuclei help us further understand the interaction between hyperons and nucleons. Recently the ΩN and ΩΩ interactions as well as binding energies were calculated by the HAL-QCD's lattice Quantum Chromo-Dynamics (LQCD) simulations and production rates of Ω-dibaryon in Au + Au collisions at RHIC and Pb + Pb collisions at LHC energies were estimated by a coalescence model. This work discusses the production of more exotic triple-baryons including Ω, namely ΩN N and ΩΩN as well as their decay channels. A variational method is used in calculations of bound states and binding energy of ΩN N and ΩΩN with the potentials from the HAL-QCD's results. The productions of ΩN N and ΩΩN are predicted by using a blast-wave model plus coalescence model in ultra-relativistic heavy ion collisions at √ sNN = 200 GeV and 2.76 TeV. Furthermore, plots for baryon number dependent yields of different baryons (N and Ω), their dibaryons and hypernuclei are made and the production rate of a more exotic tetra-baryon (ΩΩN N ) is extrapolated.