{
  "id": "hep-ex/0608046",
  "version": "v2",
  "published": "2006-08-17T05:32:03.000Z",
  "updated": "2007-02-02T12:59:01.000Z",
  "title": "Measurement of the mass of the $τ$-lepton and an upper limit on the mass difference between $τ^+$ and $τ^-$",
  "authors": [
    "The Belle Collaboration",
    "K. Belous",
    "M. Shapkin",
    "A. Sokolov"
  ],
  "comment": "9 pages, 3 figures. Submitted to Phys. Rev. Lett",
  "journal": "Phys.Rev.Lett.99:011801,2007",
  "doi": "10.1103/PhysRevLett.99.011801",
  "categories": [
    "hep-ex"
  ],
  "abstract": "The mass of the $\\tau$ lepton has been measured in the decay mode $\\tau \\to 3\\pi \\nu_\\tau$ using a pseudomass technique. The result obtained from $414 \\mathrm{fb}^{-1}$ of data collected with the Belle detector is $M_\\tau = (1776.61\\pm 0.13 {(stat.)} \\pm 0.35 {(sys.)})$ MeV/$c^2$. The upper limit on the relative mass difference between positive and negative $\\tau$ leptons is $|M_{\\tau^+}-M_{\\tau^-}|/M_{\\tau} < 2.8 \\times 10^{-4}$ at 90% confidence level.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2007-02-02T12:59:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11.30.Er",
      "13.25.Hw",
      "13.35.Dx",
      "14.40.Lb"
    ],
    "keywords": [
      "upper limit",
      "measurement",
      "confidence level",
      "decay mode",
      "relative mass difference"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 723992
    }
  }
}