ΛΛ and NΞ interactions from lattice QCD near the physical point

HAL QCD Collaboration

研究成果: Contribution to journalArticle査読

36 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号121737
ジャーナルNuclear Physics A
998
DOI
出版ステータス出版済み - 6 2020

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学

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