{
  "annotation_id": "4b7a466a-751c-490c-aa50-74c34bbd491e",
  "date_created": "2026-03-02T18:01:14.912000Z",
  "date_modified": "2026-03-02T18:01:14.912000Z",
  "file_hash": "1ccb6e04317913ca0a5aca3e3e3dd46b84dca046d7befe2678748f7d5de6e1a6",
  "private": false,
  "record": {
    "abstract": "We report the design and performance of the hybrid electromagnetic\ncalorimeter consisting of 1152 $PbWO_4$ crystals and 576 lead glass blocks for\nthe PrimEx experiment at the Jefferson Laboratory. The detector was built for\nhigh precision measurement of the neutral pion lifetime via the Primakoff\neffect. Calorimeter installation and commissioning was completed with the first\nphysics run in fall of 2004. We present the energy and position resolution of\nthe calorimeter. Obtained $\\pi^0$ mass resolution of $1.3 \\mathrm{MeV/c^2}$ and\nits production angle resolution of $0.34 \\mathrm{mrad}$ demonstrate the ability\nof the experiment to extract the $\\pi^0$ lifetime on one percent level.",
    "arxiv_id": "physics/0609201",
    "authors": [
      "M. Kubantsev",
      "I. Larin",
      "A. Gasparyan"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1063/1.2396938",
    "journal_ref": "AIP Conf.Proc.867:51-58,2006",
    "title": "Performance of the PrimEx Electromagnetic Calorimeter",
    "url": "https://arxiv.org/abs/physics/0609201"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1a648f0e-b9b9-43bb-ad32-f6ee0cc10efa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}