Most Strange Dibaryon from Lattice QCD

The ΩΩ system in the ^{1}S_{0} 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 of a≃0.0846  fm. We show that lattice QCD data analysis by the HA...

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Bibliographic Details
Published in:Physical review letters 2018-05, Vol.120 (21), p.212001-212001, Article 212001
Main Authors: Gongyo, Shinya, Sasaki, Kenji, Aoki, Sinya, Doi, Takumi, Hatsuda, Tetsuo, Ikeda, Yoichi, Inoue, Takashi, Iritani, Takumi, Ishii, Noriyoshi, Miyamoto, Takaya, Nemura, Hidekatsu
Format: Article
Language:English
Subjects:
Data analysis
Flavor (particle physics)
Ionic collisions
Quantum chromodynamics
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Summary:The ΩΩ system in the ^{1}S_{0} 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 of a≃0.0846  fm. We show that lattice QCD data analysis by the HAL QCD method leads to the scattering length a_{0}=4.6(6)(_{-0.5}^{+1.2})  fm, the effective range r_{eff}=1.27(3)(_{-0.03}^{+0.06})  fm, and the binding energy B_{ΩΩ}=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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.120.212001