{
  "id": "hep-ph/9705443",
  "version": "v1",
  "published": "1997-05-27T20:47:05.000Z",
  "updated": "1997-05-27T20:47:05.000Z",
  "title": "Evolution of Gluon Spin in the Nucleon",
  "authors": [
    "S. J. Pollock"
  ],
  "comment": "ReVTeX + psfig, 7 pages, 3 figures (postscript), accepted in Physics Letters B, (pollock@lucky.colorado.edu)",
  "journal": "Phys.Lett. B405 (1997) 355-360",
  "doi": "10.1016/S0370-2693(97)00659-X",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We examine the $Q^2$ evolution of gluon polarization in polarized nucleons. As is well known, the evolution of $\\alpha_s \\Delta G(Q^2)$ is negligible for typical momentum transfer variations found in experimental deep inelastic scattering. As $\\alpha_s$ increases, however, the leading nonzero term in the evolution equation for the singlet first moment reduces the magnitude of the gluon spin. At low $Q^2$ the term $\\alpha_s \\Delta G$ can vanish, and ultimately become negative. Thus, low energy model calculations yielding negative $\\Delta G$ are not necessarily in conflict with experimental evidence for positive gluon polarization at high $Q^2$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-05-27T20:47:05.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.60.Hb",
      "13.88.+e"
    ],
    "keywords": [
      "gluon spin",
      "model calculations yielding negative",
      "gluon polarization",
      "singlet first moment reduces",
      "typical momentum transfer variations"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 443542
    }
  }
}