Most Strange Dibaryon from Lattice QCD

2017/09/30 by Shinya Gongyo, Kenji Sasaki, Sinya Aoki +8 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Lattice field theory #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scattering #hep-ex #hep-lat #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevlett.120.212001

published as Phys. Rev. Lett. 120, 212001 (2018) · 6 pages and 4 figures

openalex publication_date 2018/05/23 · arxiv created 2018/05/24 · arxiv updated 2018/05/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The ΩΩ system in the ¹S₀ channel (the most strange dibaryon) is studied on the basis of the (2+1)-flavor lattice QCD simulations with a large volume (8.1 fm)³ and nearly physical pion mass m_π≃ 146 MeV at a lattice spacing a≃ 0.0846 fm. We show that lattice QCD data analysis by the HAL QCD method leads to the scattering length a₀ = 4.6 (6)(^+1.2_-0.5) \rm fm, the effective range r_{\rm eff} = 1.27 (3)(^+0.06_-0.03) \rm fm and the binding energy B_ΩΩ = 1.6 (6) (^+0.7_-0.6) \rm MeV. These results indicate that the ΩΩ system has an overall attraction and is located near the unitary regime. Such a system can be best searched experimentally by the pair-momentum correlation in relativistic heavy-ion collisions.

Citations

• Quark delocalization, color screening, and dibaryons
• Theoretical Foundation of the Nuclear Force in QCD and its applications to Central and Tensor Forces in Quenched Lattice QCD Simulations
• Lambda-Nucleon and Sigma-Nucleon interactions from lattice QCD with physical masses
• Exotic Hadrons from Heavy Ion Collisions
• Baryon interactions from lattice QCD with physical masses -- Overview and S = 0, -4 sectors --

Cited by

• Study of the Λ-Λ interaction with femtoscopy correlations in pp and p-Pb collisions at the LHC
• Production of Ω NN and Ω Ω N in ultra-relativistic heavy-ion collisions
• Hypernucleus [wikipedia]

Related

• NΩ dibaryon from lattice QCD near the physical point
• Most charming dibaryon near unitarity
• Lattice results on dibaryons and baryon--baryon interactions
• Lattice QCD Study of Positive Parity Dibaryons with Maximal Charm and Strangeness
• HAL QCD method and Nucleon-Omega interaction with physical quark masses