ΛΛ and NΞ interactions from lattice QCD near the physical point

HAL QCD Collaboration

doi:10.1016/j.nuclphysa.2020.121737

ΛΛ and NΞ interactions from lattice QCD near the physical point

HAL QCD Collaboration

Experimental Particle Physics

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

The S-wave ΛΛ and NΞ interactions are studied on the basis of the (2+1)-flavor lattice QCD simulations close to the physical point (m_π≃146MeV and m_K≃525MeV). Lattice QCD potentials in four different spin-isospin channels are extracted by using the coupled-channel HAL QCD method and are parametrized by analytic functions to calculate the scattering phase shifts. The ΛΛ interaction at low energies shows only a weak attraction, which does not provide a bound or resonant dihyperon. The NΞ interaction in the spin-singlet and isospin-singlet channel is most attractive and lead the NΞ system near unitarity. Relevance to the strangeness = −2 hypernuclei as well as to two-baryon correlations in proton-proton, proton-nucleus and nucleus-nucleus collisions is also discussed.

Original language	English
Article number	121737
Journal	Nuclear Physics A
Volume	998
DOIs	https://doi.org/10.1016/j.nuclphysa.2020.121737
Publication status	Published - Jun 2020

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All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Cite this

HAL QCD Collaboration (2020). ΛΛ and NΞ interactions from lattice QCD near the physical point. Nuclear Physics A, 998, [121737]. https://doi.org/10.1016/j.nuclphysa.2020.121737

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title = "ΛΛ and NΞ interactions from lattice QCD near the physical point",

abstract = "The S-wave ΛΛ and NΞ interactions are studied on the basis of the (2+1)-flavor lattice QCD simulations close to the physical point (mπ≃146MeV and mK≃525MeV). Lattice QCD potentials in four different spin-isospin channels are extracted by using the coupled-channel HAL QCD method and are parametrized by analytic functions to calculate the scattering phase shifts. The ΛΛ interaction at low energies shows only a weak attraction, which does not provide a bound or resonant dihyperon. The NΞ interaction in the spin-singlet and isospin-singlet channel is most attractive and lead the NΞ system near unitarity. Relevance to the strangeness = −2 hypernuclei as well as to two-baryon correlations in proton-proton, proton-nucleus and nucleus-nucleus collisions is also discussed.",

author = "{HAL QCD Collaboration} and Kenji Sasaki and Sinya Aoki and Takumi Doi and Shinya Gongyo and Tetsuo Hatsuda and Yoichi Ikeda and Takashi Inoue and Takumi Iritani and Noriyoshi Ishii and Keiko Murano and Takaya Miyamoto",

year = "2020",

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doi = "10.1016/j.nuclphysa.2020.121737",

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T1 - ΛΛ and NΞ interactions from lattice QCD near the physical point

AU - HAL QCD Collaboration

AU - Sasaki, Kenji

AU - Aoki, Sinya

AU - Doi, Takumi

AU - Gongyo, Shinya

AU - Hatsuda, Tetsuo

AU - Ikeda, Yoichi

AU - Inoue, Takashi

AU - Iritani, Takumi

AU - Ishii, Noriyoshi

AU - Murano, Keiko

AU - Miyamoto, Takaya

PY - 2020/6

Y1 - 2020/6

N2 - The S-wave ΛΛ and NΞ interactions are studied on the basis of the (2+1)-flavor lattice QCD simulations close to the physical point (mπ≃146MeV and mK≃525MeV). Lattice QCD potentials in four different spin-isospin channels are extracted by using the coupled-channel HAL QCD method and are parametrized by analytic functions to calculate the scattering phase shifts. The ΛΛ interaction at low energies shows only a weak attraction, which does not provide a bound or resonant dihyperon. The NΞ interaction in the spin-singlet and isospin-singlet channel is most attractive and lead the NΞ system near unitarity. Relevance to the strangeness = −2 hypernuclei as well as to two-baryon correlations in proton-proton, proton-nucleus and nucleus-nucleus collisions is also discussed.

AB - The S-wave ΛΛ and NΞ interactions are studied on the basis of the (2+1)-flavor lattice QCD simulations close to the physical point (mπ≃146MeV and mK≃525MeV). Lattice QCD potentials in four different spin-isospin channels are extracted by using the coupled-channel HAL QCD method and are parametrized by analytic functions to calculate the scattering phase shifts. The ΛΛ interaction at low energies shows only a weak attraction, which does not provide a bound or resonant dihyperon. The NΞ interaction in the spin-singlet and isospin-singlet channel is most attractive and lead the NΞ system near unitarity. Relevance to the strangeness = −2 hypernuclei as well as to two-baryon correlations in proton-proton, proton-nucleus and nucleus-nucleus collisions is also discussed.

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SN - 0375-9474

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Access to Document

10.1016/j.nuclphysa.2020.121737