{
  "id": "nucl-th/0004022",
  "version": "v2",
  "published": "2000-04-10T09:25:01.000Z",
  "updated": "2000-05-05T08:56:56.000Z",
  "title": "On the $Λ$ to $Σ^0$ ratio from proton-proton collisions",
  "authors": [
    "A. Sibirtsev",
    "K. Tsushima",
    "W. Cassing",
    "A. W. Thomas"
  ],
  "comment": "5 pages, espcrc2-style, including 4 figures",
  "categories": [
    "nucl-th"
  ],
  "abstract": "We compare the recent COSY data on the total $pp{\\to}p\\Lambda{K^+}$ and $pp{\\to}p\\Sigma^0{K^+}$ cross sections with the predictions from two boson exchange models that either are based solely on $\\pi$ and $K$ exchange or include $\\pi$, $\\eta$ and $\\rho$ exchange as well as the virtual excitation of intermediate baryon resonances. Both models are found to reproduce the data after the inclusion of final state hyperon-nucleon interactions. Thus, within the experimental uncertainties, both models also roughly reproduce the strong dependence of the $\\Lambda$ to $\\Sigma^0$ ratio as a function of the excess energy near threshold, as well as at higher energies.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2000-05-05T08:56:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "proton-proton collisions",
      "final state hyperon-nucleon interactions",
      "boson exchange models",
      "intermediate baryon resonances",
      "higher energies"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 525985,
      "adsabs": "2000nucl.th...4022S"
    }
  }
}