{
  "annotation_id": "1e348177-ff2c-49e0-a4d7-b85d7678ed24",
  "date_created": "2026-03-02T18:00:15.194000Z",
  "date_modified": "2026-03-02T18:00:15.194000Z",
  "file_hash": "75acc8fee583d3d293252ed516c831ac183229f4c6892762c8ff0fa683218867",
  "private": false,
  "record": {
    "abstract": "The four-dimensional $NN-\\pi NN$ equations are adapted to the case of scalar\nparticles with a $\\phi^2\\sigma$ interaction Lagrangian, and solved for energies\nbelow the $\\sigma$-production threshold. This is achieved in the approximation\nwhere $\\phi\\sigma$ scattering is dominated by the $s$-channel $\\phi$-pole term.\nThe importance of the removal of double-counting is investigated, and a\ndetailed comparison of the results of a covariant coupled-channels formulation\nand the Bethe-Salpeter equation in the ladder and ladder plus crossed-box\napproximations is presented. A brief discussion of the extension of the method\nto energies above the $\\sigma$-production threshold is given.",
    "arxiv_id": "nucl-th/9605004",
    "authors": [
      "D. R. Phillips",
      "I. R. Afnan"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.54.1542 10.1103/PhysRevC.55.3178",
    "journal_ref": "Phys.Rev.C54:1542-1560,1996; Erratum-ibid.C55:3178,1997",
    "title": "Solving the four-dimensional $NN-\\pi NN$ equations for scalars below   meson-production threshold",
    "url": "https://arxiv.org/abs/nucl-th/9605004"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bcc14aae-81c4-4392-a318-206cefd20bc5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}