Production of $$\Omega NN$$ and $$\Omega \Omega N$$ in ultra-relativistic heavy-ion collisions

Abstract

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