{
  "annotation_id": "b52805b2-31cf-448b-9ff1-a29b92798068",
  "date_created": "2026-03-02T18:00:11.617000Z",
  "date_modified": "2026-03-02T18:00:11.617000Z",
  "file_hash": "f65e460761aa6efd200b5bf8fe17c6f117e5f6aceb94c0a9c0e0be9ff2c5e91e",
  "private": false,
  "record": {
    "abstract": "We present two arguments indicating that the large value for the $\\epsilon_1$\nmixing parameter at 50 MeV, which the Basel group extracted from their recent\n$A_{zz}$ measurement, may be incorrect. First, there are nucleon-nucleon (NN)\npotentials which predict the $\\epsilon_1$ at 50 MeV substantially below the\nBasel value and reproduce the Basel $A_{zz}$ data accurately. Second, the large\nvalue for $\\epsilon_1$ at 50 MeV proposed by the Basel group can only be\nexplained by a model for the NN interaction which is very unrealistic (no\n$\\rho$-meson and essentially a point-like $\\pi NN$ vertex) and overpredicts the\n$\\epsilon_1$ in the energy range where it is well determined (150--500 MeV) by\na factor of two.",
    "arxiv_id": "nucl-th/9303022",
    "authors": [
      "R. Machleidt",
      "I. Slaus"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevLett.72.2664",
    "journal_ref": "Phys.Rev.Lett. 72 (1994) 2664",
    "title": "Comment on Neutron-Proton Spin-Correlation Parameter A_{ZZ} at 68 Mev",
    "url": "https://arxiv.org/abs/nucl-th/9303022"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "18f61969-d8cb-444b-80b3-225714ea8795",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}