{
  "annotation_id": "d0869f4e-5874-4df2-b405-a2a3383f239f",
  "date_created": "2026-03-02T18:01:07.009000Z",
  "date_modified": "2026-03-02T18:01:07.009000Z",
  "file_hash": "eeb19c6d97ab25f947fb74d5ca388e1bd59c20068c519b72c0785f0f54c58914",
  "private": false,
  "record": {
    "abstract": "We study elementary particle reactions that result from the interaction of an\natomic system with a very intense laser wave of circular polarization. As a\nspecific example, we calculate the rate for the laser-driven reaction $e^+e^-\n\\to \\mu^+\\mu^-$, where the electron and positron originate from a positronium\natom or, alternatively, from a nonrelativistic $e^+e^-$ plasma. We distinguish\naccordingly between the coherent and incoherent channels of the process. Apart\nfrom numerical calculations, we derive by analytical means compact formulas for\nthe corresponding reaction rates. The rate for the coherent channel in a laser\nfield of circular polarization is shown to be damped because of the destructive\ninterference of the partial waves that constitute the positronium ground-state\nwave packet. Conditions for the observation of the process via the dominant\nincoherent channel in a circularly polarized field are pointed out.",
    "arxiv_id": "physics/0602106",
    "authors": [
      "Carsten M\u00fcller",
      "Karen Z. Hatsagortsyan",
      "Christoph H. Keitel"
    ],
    "categories": [
      "physics.atom-ph",
      "physics.acc-ph"
    ],
    "doi": "10.1103/PhysRevD.74.074017",
    "journal_ref": "Phys.Rev. D74 (2006) 074017",
    "title": "Muon pair creation from positronium in a circularly polarized laser   field",
    "url": "https://arxiv.org/abs/physics/0602106"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5f0a2a17-e38e-491f-b478-6fd59e90ab02",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}