{
  "id": "nucl-th/0207033",
  "version": "v1",
  "published": "2002-07-12T09:18:10.000Z",
  "updated": "2002-07-12T09:18:10.000Z",
  "title": "Near-threshold production of $a_0(980)$-mesons in $πN$ and NN collisions and $a_0/f_0$-mixing",
  "authors": [
    "L. A. Kondratyuk",
    "E. L. Bratkovskaya",
    "V. Yu. Grishina",
    "M. Buescher",
    "W. Cassing",
    "H. Stroeher"
  ],
  "comment": "43 pages, including 16 eps figures, to be bublished in Phys. Atom. Nucl. (Yad. Fiz.) vol. 65, No. 11 (2002)",
  "journal": "Phys.Atom.Nucl. 66 (2003) 152-171; Yad.Fiz. 66 (2003) 155-174",
  "doi": "10.1134/1.1540670",
  "categories": [
    "nucl-th"
  ],
  "abstract": "We consider near-threshold $a_0(980)$-meson production in $\\pi N$ and $NN$ collisions. An effective Lagrangian approach with one-pion exchange is applied to analyze different contributions to the cross section for different isospin channels. The Reggeon exchange mechanism is also evaluated for comparison. The results from $\\pi N$ reactions are used to calculate the contribution of the $a_0$ meson to the cross sections and invariant $K \\bar K$ mass distributions of the reactions $pp\\to pn K^+\\bar K^0$ and $pp\\to pp K^+K^-$. It is found that the experimental observation of $a_0^+$ mesons in the reaction $pp\\to pn K^+\\bar K^0$ is much more promising than the observation of $a_0^0$ mesons in the reaction $pp\\to pp K^+K^-$. Effects of isospin violation in the reactions $pN \\to d a_0$, $pd \\to \\mathrm{^3He/^3H} a_0$, and $ dd \\to \\mathrm{^4He} a_0$, which are induced by $a_0(980)$--$f_0(980)$ mixing, are also analyzed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-07-12T09:18:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nn collisions",
      "near-threshold production",
      "cross section",
      "reggeon exchange mechanism",
      "lagrangian approach"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 43,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 590485
    }
  }
}