{
  "annotation_id": "06d25980-18e8-4491-b039-8e9fe94a44cf",
  "date_created": "2026-03-02T18:00:01.188000Z",
  "date_modified": "2026-03-02T18:00:01.188000Z",
  "file_hash": "bcf4f42c21fbb0149f334f3982d547d4a43adc0a67f3fd914e2ac29375657d39",
  "private": false,
  "record": {
    "abstract": "We propose an optimal Fermi-averaging for an elementary\n$\\pi^+$+$n$$\\to$$K^+$+$\\Lambda$ t-matrix under the on-energy-shell condition,\nin order to describe ($\\pi^+$,$K^+$) reactions on a nuclear target in the\nframework of a distorted-wave impulse approximation. We apply it to calculate\n$\\Lambda$ quasi-free spectra from $^{12}$C($\\pi^+$,$K^+$) reactions at $p_\\pi$=\n1.20 GeV/c and 1.05 GeV/c, and compare them with experimental data. The results\nshow that the calculated spectra are in excellent agreement with the data,\nbecause the energy-dependence originates from the nature of the optimal\nFermi-averaging t-matrix.",
    "arxiv_id": "nucl-th/0407044",
    "authors": [
      "T. Harada",
      "Y. Hirabayashi"
    ],
    "categories": [
      "nucl-th"
    ],
    "title": "Optimal Fermi-averaging t-matrix for ($\\pi^+$,$K^+$) reactions in   $\\Lambda$ quasi-free region",
    "url": "https://arxiv.org/abs/nucl-th/0407044"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "35edfb91-8dda-4bbe-9e33-cc574454d5e1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}