Production of $$\Omega NN$$ and $$\Omega \Omega N$$ in ultra-relativistic heavy-ion collisions
Liang Zhang (Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China, Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai, 200433, China, School of Nuclear Sciences and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China); Song Zhang (Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai, 200433, China, Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai, 200438, China); Yu-Gang Ma (Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai, 200433, China, Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai, 200438, China)
Even though lots of $$\Lambda $$ -hypernuclei have been found and measured, multi-strangeness hypernuclei consisting of $$\Omega $$ are not yet discovered. The studies of multi-strangeness hypernuclei help us further understand the interaction between hyperons and nucleons. Recently the $$\Omega N$$ and $$\Omega \Omega $$ interactions as well as binding energies were calculated by the HAL-QCD’s lattice Quantum Chromo-Dynamics (LQCD) simulations and production rates of $$\Omega $$ -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 $$\Omega $$ , namely $$\Omega NN$$ and $$\Omega \Omega N$$ as well as their decay channels. A variation method is used in calculations of bound states and binding energy of $$\Omega NN$$ and $$\Omega \Omega N$$ with the potentials from the HAL-QCD’s results. The productions of $$\Omega NN$$ and $$\Omega \Omega N$$ are predicted by using a blast-wave model plus coalescence model in ultra-relativistic heavy-ion collisions at $$\sqrt{s_{NN}} = 200$$ GeV and 2.76 TeV. Furthermore, plots for baryon number dependent yields of different baryons (N and $$\Omega $$ ), their dibaryons and hypernuclei are made and the production rate of a more exotic tetra-baryon ( $$\Omega \Omega NN$$ ) is extrapolated.
