{
  "id": "hep-ph/0312239",
  "version": "v2",
  "published": "2003-12-17T16:36:17.000Z",
  "updated": "2003-12-19T04:13:48.000Z",
  "title": "Recent Developments in Heavy Quark and Quarkonium Production",
  "authors": [
    "Thomas Mehen"
  ],
  "comment": "9 pages, 2 figures, talk given at XXXIII International Symposium on Multiparticle Dynamics, September 5-11, 2003, Krakow, Poland",
  "journal": "Acta Phys.Polon. B35 (2004) 121-130",
  "categories": [
    "hep-ph"
  ],
  "abstract": "Recent measurements of J/psi production in e^+ e^- colliders pose a challenge to the NRQCD factorization theorem for quarkonium production. Discrepancies between leading order calculations of color-octet contributions and the momentum distribution of J/psi observed by Belle and BaBar are resolved by resumming large perturbative and nonperturbative corrections that are enhanced near the kinematic endpoint. The large cross sections for J/psi + c + \\bar c and double quarkonium production remain poorly understood. Nonperturbative effects in fixed-target hadroproduction of open charm are also discussed. Large asymmetries in the production of charm mesons and baryons probe nonperturbative corrections to the QCD factorization theorem. A power correction called heavy-quark recombination can economically explain these asymmetries with a few universal parameters.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2003-12-19T04:13:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "heavy quark",
      "quarkonium production remain poorly understood",
      "developments",
      "nrqcd factorization theorem",
      "baryons probe nonperturbative corrections"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 635809
    }
  }
}