{
  "annotation_id": "64d05feb-8769-44f8-b3ae-fa043f0028cf",
  "date_created": "2026-03-02T18:00:53.422000Z",
  "date_modified": "2026-03-02T18:00:53.422000Z",
  "file_hash": "e817fb40540f2c94bd7487716d9edb7c6fed28eb1cf8a2d5324b0c85abeb2978",
  "private": false,
  "record": {
    "abstract": "A long-standing problem with the solution of the Schr\\\"odinger equation has\nbeen its inability to account for the electron-positron annihilation in\npositron hydrogen scattering above the positronium formation threshold. This\nletter shows that this problem has been resolved by the use of the modified\nFaddeev equations. A number of $e^- e^+$ annihilation cross sections in the\nenergy gap between $Ps(1s)$ and $H(n=2)$ thresholds are reported for both the\npositron plus hydrogen incoming channel as well as the proton plus positronium\nincoming channel. However the indirect annihilation cross sections after\nformation of the positronium themselves are well known, they will not be\nincluded in this report.",
    "arxiv_id": "physics/0410071",
    "authors": [
      "C-. Y. Hu",
      "D. Caballero",
      "A. Forrester",
      "Z. Papp"
    ],
    "categories": [
      "physics.atm-clus"
    ],
    "title": "$e^+ + H$ direct annihilation above the positronium formation threshold",
    "url": "https://arxiv.org/abs/physics/0410071"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b647aa75-3327-445a-82ab-9f23282f2282",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}