{
  "id": "1108.4845",
  "version": "v2",
  "published": "2011-08-24T14:02:08.000Z",
  "updated": "2011-09-06T10:56:22.000Z",
  "title": "Quarkonium production in pp collisions at 7 TeV with the CMS experiment",
  "authors": [
    "Bora Akgün"
  ],
  "comment": "4 pages, 5 figures",
  "categories": [
    "hep-ex"
  ],
  "abstract": "The production of J /{\\psi} and {\\Upsilon} mesons is studied in pp collisions at \\surds = 7 TeV with the CMS experiment at the LHC. The J /{\\psi} measurement is based on a dimuon sample corresponding to an integrated luminosity of 314 nb^{-1}. The J /{\\psi} differential cross section is determined, as a function of the J/{\\psi} transverse momentum, in three rapidity ranges. A fit to the decay length distribution is used to separate the prompt from the non-prompt (b hadron to J/{\\psi}) component. Integrated over the J /{\\psi} transverse momentum from 6.5 to 30 GeV/c and over rapidity in the range |y| < 2.4, the measured cross sections, times the dimuon decay branching fraction, are 70.9 \\pm 2.1(stat.) \\pm 3.0(syst.) \\pm 7.8(lumi.) nb for prompt J /{\\psi} mesons, assuming unpolarized production, and 26.0 \\pm 1.4(stat.) \\pm 1.6(syst.) \\pm 2.9(lumi.) nb for J /{\\psi} mesons from b-hadron decays. The {\\Upsilon} measurement is based on a dimuon sample corresponding to an integrated luminosity 3.1 \\pm 0.3 pb^{-1}. Integrated over the rapidity range |y| < 2, we find the product of the {\\Upsilon}(1S) production cross section and branching fraction to dimuons to be 7.37 \\pm 0.13(stat.)^{+0.61}_{-0.42}(syst.) \\pm 0.81(lumi.) nb. This cross section is obtained assuming unpolarized {\\Upsilon}(1S) production. If the {\\Upsilon}(1S) production polarization is fully transverse or fully longitudinal, the cross section changes by about 20 %.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-09-06T10:56:22.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cms experiment",
      "pp collisions",
      "cross section",
      "quarkonium production",
      "rapidity range"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 924844,
      "adsabs": "2011arXiv1108.4845A"
    }
  }
}