{
  "annotation_id": "6fdf6a45-f773-4456-94ff-4f45df7fc6fb",
  "date_created": "2026-03-02T18:01:00.415000Z",
  "date_modified": "2026-03-02T18:01:00.415000Z",
  "file_hash": "d82798c9eb20725cb5a614601dcf725e4e3b3f74c538f9aa11a8b5452a8c19c3",
  "private": false,
  "record": {
    "abstract": "A long-standing problem to account for the electron-positron annihilation in\npositron Hydrogen scattering above the Positronium formation threshold has been\nresolved by the use of the three-body Faddeev formalism. The multichannel\nthree-body theory for scattering states in presence of a complex absorbing\npotential is developed in order to compute the direct $e^+ e^-$ annihilation\namplitude, the amplitude of Positronium formation and respective cross\nsections. A number of $e^+ e^-$ direct annihilation cross sections and\nPositronium formation cross sections in the energy gap between Ps$(1s)$ and\nH$(n=2)$ thresholds are reported for both the positron-Hydrogen incoming\nchannel as well as the proton-Positronium incoming channel.",
    "arxiv_id": "physics/0510009",
    "authors": [
      "S. L. Yakovlev",
      "C-. Y. Hu"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "title": "Positron annihilation in $e^+ -$H collision above the Positronium   formation threshold",
    "url": "https://arxiv.org/abs/physics/0510009"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1b5588d9-2088-4b07-95b5-a7de84e35411",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}