2022/05/01 by Liang Zhang, S. Zhang, Y. G. · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies #Omega #Physics #Particle physics #Baryon #Hyperon #Coalescence (physics) #Omega baryon #Strangeness #Lattice QCD #Nuclear physics #Nucleon #Hypernucleus #Quantum chromodynamics #Quark model #Quarkonium #Quantum mechanics
paper · pdf · doi:10.1140/epjc/s10052-022-10336-7
openalex publication_date 2022/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract Even though lots of Λ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Λ</mml:mi> </mml:math> -hypernuclei have been found and measured, multi-strangeness hypernuclei consisting of Ω <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Ω</mml:mi> </mml:math> are not yet discovered. The studies of multi-strangeness hypernuclei help us further understand the interaction between hyperons and nucleons. Recently the Ω N <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> and Ω Ω <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>Ω</mml:mi> </mml:mrow> </mml:math> interactions as well as binding energies were calculated by the HAL-QCD’s lattice Quantum Chromo-Dynamics (LQCD) simulations and production rates of Ω <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Ω</mml:mi> </mml:math> -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 Ω <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Ω</mml:mi> </mml:math> , namely Ω NN <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> and Ω Ω N <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> as well as their decay channels. A variation method is used in calculations of bound states and binding energy of Ω NN <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> and Ω Ω N <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> with the potentials from the HAL-QCD’s results. The productions of Ω NN <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> and Ω Ω N <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> are predicted by using a blast-wave model plus coalescence model in ultra-relativistic heavy-ion collisions at √sNN = 200 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mrow> <mml:mi>NN</mml:mi> </mml:mrow> </mml:msub> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>200</mml:mn> </mml:mrow> </mml:math> GeV and 2.76 TeV. Furthermore, plots for baryon number dependent yields of different baryons ( N and Ω <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>Ω</mml:mi> </mml:math> ), their dibaryons and hypernuclei are made and the production rate of a more exotic tetra-baryon ( Ω Ω NN <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Ω</mml:mi> <mml:mi>Ω</mml:mi> <mml:mi>N</mml:mi> <mml:mi>N</mml:mi> </mml:mrow> </mml:math> ) is extrapolated.