{
  "annotation_id": "258ac1a7-191f-45a6-beda-04050c39aa2f",
  "date_created": "2026-03-02T18:00:18.852000Z",
  "date_modified": "2026-03-02T18:00:18.852000Z",
  "file_hash": "3bb86ca849dcb2d07507dc4eebbf2c0d5c167987af6d1910fc0c57ed6f529545",
  "private": false,
  "record": {
    "abstract": "Three- and four-neutron systems are studied within the framework of the\nhyperspherical approach with a local S-wave nn-potential. Possible bound and\nresonant states of these systems are sought as zeros of three- and four-body\nJost functions in the complex momentum plane. It is found that zeros closest to\nthe origin correspond to sub-threshold (nnn) (1/2-) and (nnnn) (0+) resonant\nstates. The positions of these zeros turned out to be sensitive to the choice\nof the $nn$--potential. For the Malfliet- Tjon potential they are\nE(nnn)=-4.9-i6.9 (MeV) and E(nnnn)=-2.6-i9.0 (MeV). Movement of the zeros with\nan artificial increase of the potential strength also shows an extreme\nsensitivity to the choice of potential. Thus, to generate ^3n and ^4n bound\nstates, the Yukawa potential needs to be multiplied by 2.67 and 2.32\nrespectively, while for the Malfliet-Tjon potential the required multiplicative\nfactors are 4.04 and 3.59.",
    "arxiv_id": "nucl-th/9705016",
    "authors": [
      "S. A. Sofianos",
      "S. A. Rakityansky",
      "G. P. Vermaak"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1088/0954-3899/23/11/010",
    "journal_ref": "J.Phys.G23:1619-1630,1997",
    "title": "Sub-threshold resonances in few-neutron systems",
    "url": "https://arxiv.org/abs/nucl-th/9705016"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "668d2a2c-dbd3-4be2-9689-033a99b4f574",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}