{
  "id": "1106.4262",
  "version": "v1",
  "published": "2011-06-21T17:01:42.000Z",
  "updated": "2011-06-21T17:01:42.000Z",
  "title": "$χ_{cJ}$ production associated with a $c\\bar c$ pair at hadron colliders",
  "authors": [
    "Dan Li",
    "Yan-Qing Ma",
    "Kuang-Ta Chao"
  ],
  "comment": "Published in PRD, 18 pages, 8 figures",
  "journal": "Phys.Rev.D83:114037,2011",
  "doi": "10.1103/PhysRevD.83.114037",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "$\\chi_{cJ}$ (J=0,1,2) production associated with a charm quark pair in hadron collisions is calculated in the framework of nonrelativistic QCD at the Tevatron and LHC. It is found that the color-singlet contribution is small and the color-octet contribution may be dominant in the large $p_T$ region. The differential cross section of $p\\bar p\\to\\chi_c+c\\bar{c}$ is at least one order of magnitude smaller than the next-to-leading order result of $\\chi_{cJ}$ inclusive production $p\\bar p\\to\\chi_c+X$, therefore $\\chi_{cJ}$ production in $p\\bar p\\to\\chi_c+c\\bar{c}$ may have negligible influence on the ratio $R_{\\chi_c}=\\frac{\\sigma_{\\chi_{c2}}}{\\sigma_{\\chi_{c1}}}$ measured by CDF at the Tevatron. The feeddown contribution from $\\chi_{cJ}+c+\\bar{c}$ to $J/\\psi+c+\\bar{c}$ is found to be large compared with $J/\\psi$ direct production and may have important influence on the measurement of $J/\\psi+c+\\bar{c}$. The validity of fragmentation approximation for the process is also discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-06-21T17:01:42.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.60.Le",
      "14.40.Pq",
      "12.38.Bx"
    ],
    "keywords": [
      "hadron colliders",
      "production",
      "charm quark pair",
      "differential cross section",
      "important influence"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2011,
      "month": "Jun",
      "volume": 83,
      "number": 11,
      "pages": 114037
    },
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 914332,
      "adsabs": "2011PhRvD..83k4037L"
    }
  }
}