TY - JOUR
T1 - Most Strange Dibaryon from Lattice QCD
AU - (HAL QCD Collaboration)
AU - Gongyo, Shinya
AU - Sasaki, Kenji
AU - Aoki, Sinya
AU - Doi, Takumi
AU - Hatsuda, Tetsuo
AU - Ikeda, Yoichi
AU - Inoue, Takashi
AU - Iritani, Takumi
AU - Ishii, Noriyoshi
AU - Miyamoto, Takaya
AU - Nemura, Hidekatsu
N1 - Funding Information:
We thank members of PACS Collaboration for the gauge configuration generation. The lattice QCD calculations have been performed on the K computer at RIKEN, AICS (hp120281, hp130023, hp140209, hp150223, hp150262, hp160211, hp170230), HOKUSAI FX100 computer at RIKEN, Wako (G15023, G16030, G17002), and HA-PACS at University of Tsukuba (14a-20, 15a-30). We thank ILDG/JLDG , which serves as an essential infrastructure in this study. We thank the authors of cu lgt code used for the gauge fixing. This study is supported in part by Grant-in-Aid for Scientific Research on Innovative Areas (No. 2004∶20105001, 20105003) and for Scientific Research (No. 25800170 and No. 26400281), SPIRE (Strategic Program for Innovative REsearch), MEXT Grant-in-Aid for Scientific Research (JP15K17667, JP16H03978, JP16K05340), “Priority Issue on Post-K computer” (Elucidation of the Fundamental Laws and Evolution of the Universe), and by Joint Institute for Computational Fundamental Science (JICFuS). S. G. is supported by the Special Postdoctoral Researchers Program of RIKEN. T. D. and T. H. are partially supported by RIKEN iTHES Project and iTHEMS Program. T. H. is grateful to the Aspen Center for Physics, supported in part by NSF Grants No. PHY1066292 and No. PHY1607611. The authors thank C. M. Ko for drawing our attention to the ΩΩ system, K. Yazaki for fruitful discussions on the short-range part of baryon-baryon interactions, and Y. Namekawa for his careful reading of the manuscript.
Publisher Copyright:
© 2018 authors. Published by the American Physical Society.
PY - 2018/5/23
Y1 - 2018/5/23
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.120.212001
DO - 10.1103/PhysRevLett.120.212001
M3 - Article
C2 - 29883161
AN - SCOPUS:85047459145
SN - 0031-9007
VL - 120
JO - Physical review letters
JF - Physical review letters
IS - 21
M1 - 212001
ER -