{
  "id": "hep-ph/9503250",
  "version": "v1",
  "published": "1995-03-07T07:49:58.000Z",
  "updated": "1995-03-07T07:49:58.000Z",
  "title": "Hadroproduction of Charmonium at Large $x_F$",
  "authors": [
    "M. Vänttinen"
  ],
  "comment": "14 pages, standard Latex, 3 figures included as an uuencoded Postscript file",
  "journal": "Phys.Rev.D52:3872-3877,1995",
  "doi": "10.1103/PhysRevD.52.3872",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We present a higher-twist production mechanism for $\\eta_c$ and $\\chi_J$ charmonium at large momentum fraction $x_F$ in pion-nucleon collisions. The higher-twist contribution is essentially independent of $x_F$ and therefore becomes dominant at large $x_F$, where the leading-twist contribution falls off as $(1-x_F)^3$. We show that the higher-twist mechanism produces longitudinally polarized $\\chi_1$ and $\\chi_2$. For the $\\chi_2$, this is clearly different from the leading-twist prediction of transverse polarization. For the $\\chi_1$, the polarization of the leading- and higher-twist contributions is qualitatively similar.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1995-03-07T07:49:58.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "charmonium",
      "mechanism produces",
      "higher-twist contribution",
      "hadroproduction",
      "large momentum fraction"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 393265
    }
  }
}