{
  "annotation_id": "554ccdb7-7952-4581-b532-25a39f342248",
  "date_created": "2026-03-02T18:00:42.277000Z",
  "date_modified": "2026-03-02T18:00:42.277000Z",
  "file_hash": "e20bf3e87742cccf1a8d5a014d5e9f722036893c46973020d3312e83e3910f69",
  "private": false,
  "record": {
    "abstract": "The $(p,d,\\bar{p},\\bar{d})$ molecule, with a proton, a deuteron and their\nantiparticles, is stable againt spontaneous dissociation, but none of its\nthree-body subsystems are stable. This molecule should be built by combining\ntwo atoms, for instance a protonium $(p\\bar{p})$ and its heavier analogue\n$(d\\bar{d})$. Most other four-body molecules have at least one stable\nthree-body subsystem and thus can be built by adding the constituents one by\none.",
    "arxiv_id": "physics/0302004",
    "authors": [
      "Jean-Marc Richard"
    ],
    "categories": [
      "physics.atom-ph",
      "physics.chem-ph"
    ],
    "doi": "10.1103/PhysRevA.67.034702",
    "title": "Critically-bound four-body molecules",
    "url": "https://arxiv.org/abs/physics/0302004"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "26356bfd-5963-4ed6-b413-5c319b1b5c03",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}