{
  "annotation_id": "d09d15ba-dd79-4581-988b-297d19e27ea5",
  "date_created": "2026-03-02T18:00:53.555000Z",
  "date_modified": "2026-03-02T18:00:53.555000Z",
  "file_hash": "9d0f1126e7e5f9c77e5ac6c962f1010edeefffcec56aef6647f9fa97e753c107",
  "private": false,
  "record": {
    "abstract": "Preliminary results of the strong interaction shift and width in pionic\nhydrogen ($\\pi H$) using an X-ray spectrometer with spherically bent crystals\nand CCDs as X-ray detector are presented. In the experiment at the Paul\nScherrer Institute three different $(np\\to 1s)$ transitions in $\\pi H$ were\nmeasured. Moreover the pion mass measurement using the $(5 \\to 4)$ transitions\nin pionic nitrogen and muonic oxygen is presented",
    "arxiv_id": "physics/0409066",
    "authors": [
      "Martino Trassinelli"
    ],
    "categories": [
      "physics.atom-ph",
      "nucl-ex"
    ],
    "journal_ref": "DAFNE 2004: Physics at meson factories, Italie (2004)",
    "title": "Precision Spectroscopy of Pionic Atoms: From Pion Mass Evaluation to   Tests of Chiral Perturbation Theory",
    "url": "https://arxiv.org/abs/physics/0409066"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6830c73b-3cb7-4381-9160-8c13186a6ec4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}