期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.092501
关键词
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资金
- JSPS [JP18H05407, JP16H03995, JP18H05236, JP19K03879]
- priority issue (Elucidation of the fundamental laws and evolution of the universe)
- Joint Institute for Computational Fundamental Science (JICFuS)
Experimental evidence exists that the Xi-nucleus interaction is attractive. We search for NN Xi and NNN Xi bound systems on the basis of the AV8 NN potential combined with either a phenomenological Nijmegen Xi N potential or a first principles HAL QCD Xi N potential. The binding energies of the three-body and four-body systems (below the d + Xi and H-3/He-3 + Xi thresholds, respectively) are calculated by a high precision variational approach, the Gaussian expansion method. Although the two Xi N potentials have significantly different isospin (T) and spin (S) dependence, the NNN Xi system with quantum numbers (T = 0, J(pi) = 1(+)) appears to be bound (one deep for Nijmegen and one shallow for HAL QCD) below the H-3/He-3 + Xi threshold. Experimental implications for such a state are discussed.
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