{
  "annotation_id": "5a856291-aeed-4294-8a87-e6dad00fd146",
  "date_created": "2026-03-02T18:00:29.338000Z",
  "date_modified": "2026-03-02T18:00:29.338000Z",
  "file_hash": "c6ad3f94399f1a764f6208522d1a1d1cc981b606fb92f123f9200137d36aa9ce",
  "private": false,
  "record": {
    "abstract": "A model is developed for the hadronic interaction in the two-nucleon system\nabove pion threshold which is based on meson, nucleon and $\\Delta$ degrees of\nfreedom and which includes full meson retardation in the exchange operators.\nFor technical reasons, the model allows maximal one meson to be present\nexplicitly. Thus the Hilbert space contains besides $NN$ and $N\\Delta$ also\nconfigurations consisting of two nucleons and one meson. For this reason, only\ntwo- and three-body unitarity is obeyed, and the model is suited for reactions\nin the two nucleon sector only, where one pion is produced or absorbed.\nStarting from a realistic pure nucleonic retarded potential, which had to be\nrenormalized because of the additional $\\pi$ and $\\Delta$ degrees of freedom, a\nreasonable fit to experimental $NN$-scattering data could be achieved.",
    "arxiv_id": "nucl-th/9912017",
    "authors": [
      "Michael Schwamb",
      "Hartmuth Arenhoevel"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0375-9474(01)00355-4",
    "journal_ref": "Nucl.Phys. A690 (2001) 647-681",
    "title": "The Role of Meson Retardation in the NN Interaction above Pion Threshold",
    "url": "https://arxiv.org/abs/nucl-th/9912017"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fd03e676-8f0e-4892-b3c3-9081e3bb0427",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}