{
  "id": "0910.4283",
  "version": "v2",
  "published": "2009-10-22T10:26:35.000Z",
  "updated": "2010-02-10T08:48:34.000Z",
  "title": "Precise determination of the strong coupling constant at NNLO in QCD from the three-jet rate in electron--positron annihilation at LEP",
  "authors": [
    "G. Dissertori",
    "A. Gehrmann-De Ridder",
    "T. Gehrmann",
    "E. W. N. Glover",
    "G. Heinrich",
    "H. Stenzel"
  ],
  "journal": "Phys.Rev.Lett.104:072002,2010",
  "doi": "10.1103/PhysRevLett.104.072002",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We present the first determination of the strong coupling constant from the three-jet rate in e+e- annihilation at LEP, based on a next-to-next-to-leading order (NNLO) perturbative QCD prediction. More precisely, we extract alpha_s by fitting perturbative QCD predictions at O(alpha_s^3) to data from the ALEPH experiment at LEP. Over a large range of the jet-resolution parameter ycut this observable is characterised by small non-perturbative corrections and an excellent stability under renormalisation scale variation. For the three-jet rate at ln(ycut) = -3.9 we find alpha_s(MZ) = 0.1175 +/- 0.0020(exp) \\+/- 0.0015(theo), which is among the most precise determinations from jet observables at LEP.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-02-10T08:48:34.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.66.Jn",
      "13.66.Bc",
      "12.38.Bx",
      "13.87.-a"
    ],
    "keywords": [
      "strong coupling constant",
      "three-jet rate",
      "precise determination",
      "electron-positron annihilation",
      "perturbative qcd prediction"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2010,
      "month": "Feb",
      "volume": 104,
      "number": 7,
      "pages": "072002"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 834875,
      "adsabs": "2010PhRvL.104g2002D"
    }
  }
}