The ΩΩ system in the S01 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 mπ≃146 MeV at a lattice spacing of 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)(-0.5+1.2) fm, the effective range reff=1.27(3)(-0.03+0.06) fm, and the binding energy BΩΩ=1.6(6)(-0.6+0.7) 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.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)