{
  "id": "hep-ex/0007057",
  "version": "v1",
  "published": "2000-07-27T12:41:34.000Z",
  "updated": "2000-07-27T12:41:34.000Z",
  "title": "A Search for $B\\to τν$",
  "authors": [
    "T. E. Browder",
    "CLEO Collaboration"
  ],
  "comment": "10 ages postscript, also available through http://w4.lns.cornell.edu/public/CLNS",
  "journal": "Phys.Rev.Lett.86:2950-2954,2001",
  "doi": "10.1103/PhysRevLett.86.2950",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We report results of a search for $B\\to\\tau\\nu$ in a sample of 9.7 million charged $B$ meson decays. The search uses both $\\pi\\nu$ and $\\ell\\nu\\bar\\nu$ decay modes of the $\\tau$, and demands exclusive reconstruction of the companion $\\bar B$ decay to suppress background. We set an upper limit on the branching fraction ${\\cal B}(B\\to \\tau\\nu) < 8.4\\times 10^{-4}$ at 90% confidence level. With slight modification to the analysis we also establish ${\\cal B}(B^\\pm\\to K^\\pm\\nu\\bar\\nu) < 2.4\\times 10^{-4}$ at 90% confidence level.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-07-27T12:41:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "confidence level",
      "slight modification",
      "decay modes",
      "demands exclusive reconstruction",
      "report results"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 530957
    }
  }
}