{
  "annotation_id": "c4d3144f-3dad-405c-891e-a12e6d40be1b",
  "date_created": "2026-03-02T18:00:15.294000Z",
  "date_modified": "2026-03-02T18:00:15.294000Z",
  "file_hash": "c0e844dbf8f884976ea3818590bfa20253209c4a1d60923a45c80d479a10d0d4",
  "private": false,
  "record": {
    "abstract": "The long mean free path of $K^+$ mesons in nuclear matter makes this particle\na suitable messenger for the dynamics of nucleus-nucleus reactions at\nintermediate energies (100 MeV to 3 GeV per nucleon). A prerequisite for this\nis the knowledge of the elementary production cross sections $\\pi N \\rightarrow\n\\Sigma K$. Here these cross sections are studied for the first time with the\nexplicite inclusion of the relevant baryon resonances up to 2 GeV as\nintermediate states. The baryon resonances -- $N(1710)\\, I(J^P) = \\frac{1}{2}\n(\\frac{1}{2}^+),\\, N(1720)\\, \\frac{1}{2} (\\frac{3}{2}^+)$ and $\\Delta(1920)\\,\n\\frac{3}{2} (\\frac{3}{2}^+)\\,$ -- are taken into account coherently in the\ncalculations of the $\\pi N \\rightarrow \\Sigma K$ process. (We refer to this\nmodel as the `resonance model\u0027.) Also $K^*(892)\\frac{1}{2} (1^-)$ vector meson\nexchange is included. It is shown that the total cross sections for different\nchannels of the $\\pi N \\rightarrow \\Sigma k$ reactions, i.e. $\\pi^+ p\n\\rightarrow \\Sigma^+ K^+$, $\\pi^- p \\rightarrow \\Sigma^- K^+$, $\\pi^+ n\n\\rightarrow \\Sigma^0 K^+$ ($\\pi^- p \\rightarrow \\Sigma^- K^+$) and $\\pi^0 p\n\\rightarrow \\Sigma^0 K^+$ differ not only by absolute values but also by their\nenergy dependence. This shape differences are due to the mixture of the isospin\n$I = 3/2$ $\\Delta(1920)$ with isospin $I = 1/2$ nucleon resonances. However,\nthis $I = 3/2$ resonance does not give a contribution to the $\\pi N \\rightarrow\n\\Lambda K$ reactions. So the shapes of the total cross sections $\\pi N\n\\rightarrow \\Lambda K$ for different isospin projections are the same. In spite\nof this, such cross sections averaged over different isospin projections in the\nsame multiplet",
    "arxiv_id": "nucl-th/9407021",
    "authors": [
      "K. Tsushima",
      "S. W. Huang",
      "Amand Faessler"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/0370-2693(94)90971-7",
    "journal_ref": "Phys.Lett. B337 (1994) 245-253",
    "title": "The Role of the $\\Delta(1920)$ Resonance for Kaon Production in Heavy   Ion Collisions",
    "url": "https://arxiv.org/abs/nucl-th/9407021"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4e63080d-b9f3-42ea-8ef8-7599d1e9dfcb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}