TY - JOUR
T1 - NΩ dibaryon from lattice QCD near the physical point
AU - HAL QCD Collaboration
AU - Iritani, Takumi
AU - Aoki, Sinya
AU - Doi, Takumi
AU - Etminan, Faisal
AU - Gongyo, Shinya
AU - Hatsuda, Tetsuo
AU - Ikeda, Yoichi
AU - Inoue, Takashi
AU - Ishii, Noriyoshi
AU - Miyamoto, Takaya
AU - Sasaki, Kenji
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 (hp120281, hp130023, hp140209, hp150223, hp150262, hp160211, hp170230), HOKUSAI FX100 computer at RIKEN (G15023, G16030, G17002) and HA-PACS at University of Tsukuba (14a-20, 15a-30). We thank ILDG/JLDG [39,40] which serves as an essential infrastructure in this study. We thank the authors of cuLGT code [41] for the gauge fixing. This research was supported by SPIRE (Strategic Program for Innovative REsearch), MEXT as “Priority Issue on Post-K computer” (Elucidation of the Fundamental Laws and Evolution of the Universe) and JICFuS. This work is supported by JSPS Grant-in-Aid for Scientific Research, No. 18H05236 , 18H05407 , 16H03978 , 15K17667 . T.H. is grateful to the Aspen Center for Physics , supported in part by NSF Grants PHY1607611 . The authors thank T. Sekihara, K. Morita, and A. Ohnishi for fruitful discussions, and H. Nemura and Y. Namekawa for useful comments.
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 (hp120281, hp130023, hp140209, hp150223, hp150262, hp160211, hp170230), HOKUSAI FX100 computer at RIKEN (G15023, G16030, G17002) and HA-PACS at University of Tsukuba (14a-20, 15a-30). We thank ILDG/JLDG [39,40] which serves as an essential infrastructure in this study. We thank the authors of cuLGT code [41] for the gauge fixing. This research was supported by SPIRE (Strategic Program for Innovative REsearch), MEXT as “Priority Issue on Post-K computer” (Elucidation of the Fundamental Laws and Evolution of the Universe) and JICFuS. This work is supported by JSPS Grant-in-Aid for Scientific Research, No. 18H05236, 18H05407, 16H03978, 15K17667. T.H. is grateful to the Aspen Center for Physics, supported in part by NSF Grants PHY1607611. The authors thank T. Sekihara, K. Morita, and A. Ohnishi for fruitful discussions, and H. Nemura and Y. Namekawa for useful comments.
Publisher Copyright:
© 2019 The Author(s)
PY - 2019/5/10
Y1 - 2019/5/10
N2 - The nucleon(N)-Omega(Ω) system in the S-wave and spin-2 channel (S25) is studied from the (2+1)-flavor lattice QCD with nearly physical quark masses (m π ≃146MeV and m K ≃525MeV). The time-dependent HAL QCD method is employed to convert the lattice QCD data of the two-baryon correlation function to the baryon-baryon potential and eventually to the scattering observables. The NΩ(S25) potential, obtained under the assumption that its couplings to the D-wave octet-baryon pairs are small, is found to be attractive in all distances and to produce a quasi-bound state near unitarity: In this channel, the scattering length, the effective range and the binding energy from QCD alone read a 0 =5.30(0.44)( −0.01 +0.16 )fm, r eff =1.26(0.01)( −0.01 +0.02 )fm, B=1.54(0.30)( −0.10 +0.04 )MeV, respectively. Including the extra Coulomb attraction, the binding energy of pΩ − (S25) becomes B pΩ − =2.46(0.34)( −0.11 +0.04 )MeV. Such a spin-2 pΩ − state could be searched through two-particle correlations in p-p, p-nucleus and nucleus-nucleus collisions.
AB - The nucleon(N)-Omega(Ω) system in the S-wave and spin-2 channel (S25) is studied from the (2+1)-flavor lattice QCD with nearly physical quark masses (m π ≃146MeV and m K ≃525MeV). The time-dependent HAL QCD method is employed to convert the lattice QCD data of the two-baryon correlation function to the baryon-baryon potential and eventually to the scattering observables. The NΩ(S25) potential, obtained under the assumption that its couplings to the D-wave octet-baryon pairs are small, is found to be attractive in all distances and to produce a quasi-bound state near unitarity: In this channel, the scattering length, the effective range and the binding energy from QCD alone read a 0 =5.30(0.44)( −0.01 +0.16 )fm, r eff =1.26(0.01)( −0.01 +0.02 )fm, B=1.54(0.30)( −0.10 +0.04 )MeV, respectively. Including the extra Coulomb attraction, the binding energy of pΩ − (S25) becomes B pΩ − =2.46(0.34)( −0.11 +0.04 )MeV. Such a spin-2 pΩ − state could be searched through two-particle correlations in p-p, p-nucleus and nucleus-nucleus collisions.
UR - http://www.scopus.com/inward/record.url?scp=85063988520&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063988520&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2019.03.050
DO - 10.1016/j.physletb.2019.03.050
M3 - Article
AN - SCOPUS:85063988520
SN - 0370-2693
VL - 792
SP - 284
EP - 289
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -