{
  "annotation_id": "f6931371-8240-495b-9cd5-c4b635268672",
  "date_created": "2026-03-02T18:00:29.338000Z",
  "date_modified": "2026-03-02T18:00:29.338000Z",
  "file_hash": "139ab814f7257e760a87f76764111f68e664452abbc566231ab1e555bc691dc8",
  "private": false,
  "record": {
    "abstract": "We first determine the Lambda-N S-wave phase shifts so as to reproduce the\nexperimental Lambda separation energies of A=3, 4 Lambda-hypernuclei, and then\nconstruct three phase-equivalent Lambda-N potentials with different central\nrepulsion. By the stochastic variational method with correlated Gaussian basis\nwe perform an extensive calculation of ab initio type for the hypernuclei of up\nto A=6. The binding energies and the sizes of the Lambda-hypernuclei are very\ninsensitive to the type of the phase-equivalent Lambda-N potentials. We use two\ndifferent Lambda-Lambda potentials which both reproduce Delta B_{Lambda Lambda}\nof 6He_{Lambda Lambda} reasonably well. Any combination of these Lambda-N and\nLambda-Lambda potentials predicts hitherto undiscovered particle-stable bound\nstates, 4H_{Lambda Lambda}, 5H_{Lambda Lambda} and 5He_{Lambda Lambda}:\nPredicted values of B_{Lambda Lambda} are about 0.4, 5.5 and 6.3 MeV,\nrespectively. The binding energy of 4H_{Lambda Lambda} is so small that its\npossibility crucially depends on the strength of the Lambda-Lambda interaction.\nThe binding energies of both 5He_Lambda and 6He_{Lambda Lambda} are calculated\nto be strongly overbound compared to experiment. In relation to this well-known\nanomaly we examine the effect of the quark substructure of $N$ and Lambda on\ntheir binding energies. The effect is negligible if the baryon size in which\nthree quarks are confined is smaller than 0.6 fm, but becomes appreciable,\nparticularly in 6He_{Lambda Lambda}, if the size is taken to be as large as 0.7\nfm. We discuss the extent to which the nucleon subsystem in the hypernuclei\nchanges by the addition of Lambda particles. The charge symmetry breaking of\nthe Lambda-N potential is phenomenologically determined and concluded to be\nweakly spin-dependent.",
    "arxiv_id": "nucl-th/9912065",
    "authors": [
      "Hidekatsu Nemura",
      "Yasuyuki Suzuki",
      "Yoshikazu Fujiwara",
      "Choki Nakamoto"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1143/PTP.103.929",
    "journal_ref": "Prog.Theor.Phys. 103 (2000) 929-958",
    "title": "Study of Light Lambda- and Lambda Lambda-Hypernuclei with the Stochastic   Variational Method and Effective Lambda N Potentials",
    "url": "https://arxiv.org/abs/nucl-th/9912065"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fee0a9aa-30c8-44cd-a5a3-f40d7ed87cbf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}