{
  "id": "hep-ex/9803020",
  "version": "v1",
  "published": "1998-03-22T13:38:34.000Z",
  "updated": "1998-03-22T13:38:34.000Z",
  "title": "An upper limit on the anomalous magnetic moment of the τlepton",
  "authors": [
    "The OPAL Collaboration",
    "K. Ackerstaff et al"
  ],
  "comment": "20 pages, LaTeX, uses a4p.sty, 4 eps figures included, submitted to Phys. Lett. B",
  "journal": "Phys.Lett.B431:188-198,1998",
  "doi": "10.1016/S0370-2693(98)00520-6",
  "categories": [
    "hep-ex"
  ],
  "abstract": "Using radiative Z^0 -> \\tau^+ \\tau^- \\gamma events collected with the OPAL detector at LEP at \\sqrt{s}= M_Z during 1990-95, a direct study of the electromagnetic current at the \\tau\\gamma vertex has been performed in terms of the anomalous magnetic form factor F_2 of the \\tau lepton. The analysis is based on a data sample of 1429 e^+ e^- -> \\tau^+ \\tau^- \\gamma events which are examined for a deviation from the expectation with F_2 = 0. From the non-observation of anomalous \\tau^+ \\tau^- \\gamma production a limit of -0.068 < F_2 < 0.065 is obtained. This can also be interpreted as a limit on the electric dipole form factor F_3 as -3.8 x 10^-16 e-cm < eF_3 < 3.6 x 10^-16 e-cm. The above ranges are valid at the 95% confidence level.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-03-22T13:38:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "anomalous magnetic moment",
      "upper limit",
      "electric dipole form factor",
      "anomalous magnetic form factor",
      "data sample"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 468442
    }
  }
}