{
  "annotation_id": "11ef8ab6-8e62-4320-a6d3-335f2d77a7c8",
  "date_created": "2026-03-02T18:00:18.802000Z",
  "date_modified": "2026-03-02T18:00:18.802000Z",
  "file_hash": "57b9866b79895af7ca4c1c51d7bc7c4b1f3533778032026cbf135bc1c4581414",
  "private": false,
  "record": {
    "abstract": "Contributions of the direct quark mechanism are studied in the nonmesonic\nweak decays of light hypernuclei. The $\\Lambda N \\to NN$ transition is\ndescribed by the one pion exchange mechanism and the direct quark mechanism,\ninduced by the four-quark vertices in the effective weak Hamiltonian. By\nemploying a realistic wave function of the $\\Lambda$ inside the hypernuclei,\nnonmesonic decay rates of $^4_{\\Lambda}$H, $^4_{\\Lambda}$He, and\n$^5_{\\Lambda}$He are calculated. The results show that the direct quark\nmechanism is significantly large and gives a large $\\Delta I =3/2$ contribution\nin the J=0 channel. The relative phase between the one-pion exchange and the\ndirect-quark contributions is determined so that the effective weak Hamiltonian\nfor quarks give both of them consistently. We find that the sum of these two\ncontributions reproduce the current available experimental data fairly well.",
    "arxiv_id": "nucl-th/9708041",
    "authors": [
      "T. Inoue",
      "M. Oka",
      "T. Motoba",
      "K. Itonaga"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1016/S0375-9474(98)00005-0",
    "journal_ref": "Nucl.Phys.A633:312-330,1998",
    "title": "Non-mesonic Weak Decays of Light Hypernuclei in the Direct Quark and the   One-Pion Exchange Mechanisms",
    "url": "https://arxiv.org/abs/nucl-th/9708041"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "97aacb67-fe8b-48c7-b43c-dc56e0e4e200",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}