{
  "annotation_id": "61e7e8f5-2ecd-42c8-b857-45297a3f87a7",
  "date_created": "2026-03-02T18:00:04.963000Z",
  "date_modified": "2026-03-02T18:00:04.963000Z",
  "file_hash": "f594cd1ef75f73855e879e18ba9b3b4cbe15fd3fc4411dfca5951d70958a4144",
  "private": false,
  "record": {
    "abstract": "We derive general explicit expressions for a shell-model calculation of the\nintrinsic asymmetry parameter, $a_\\Lambda$, in nonmesonic weak hypernuclear\ndecay. They include the effects of three-body kinematics in the final states of\nthe decay and correctly treat the contribution of transitions originating from\nsingle-proton states beyond the s-shell. The expressions are particularized to\nthe cases of $^5_\\Lambda$He and $^{12}_\\Lambda$C and used for the calculation\nof $a_\\Lambda$ in several one-meson-exchange models. Besides the strictly local\napproximation usually adopted for the transition potential, we also consider\nthe addition of the first-order nonlocality terms. We find values for\n$a_\\Lambda$ ranging from -0.62 to -0.24, in qualitative agreement with other\ntheoretical estimates but in contradiction with some recent experimental\ndeterminations.",
    "arxiv_id": "nucl-th/0503037",
    "authors": [
      "Cesar Barbero",
      "Alfredo P. Galeao",
      "Francisco Krmpotic"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.72.035210",
    "journal_ref": "Phys.Rev. C72 (2005) 035210",
    "title": "Asymmetry parameter for nonmesonic hypernuclear decay",
    "url": "https://arxiv.org/abs/nucl-th/0503037"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "70f96786-e17b-4cce-8d3f-bed9b3be1136",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}