{
  "id": "hep-ex/0305035",
  "version": "v1",
  "published": "2003-05-15T12:46:34.000Z",
  "updated": "2003-05-15T12:46:34.000Z",
  "title": "Measurement of the ratio Gamma(K_L -> gamma gamma)/Gamma(K_L -> pi^0 pi^0 pi^0) with the KLOE detector",
  "authors": [
    "The KLOE Collaboration"
  ],
  "comment": "14 pages",
  "journal": "Phys.Lett.B566:61-69,2003",
  "doi": "10.1016/S0370-2693(03)00810-4",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We have measured the ratio R=Gamma(K_L -> gamma gamma)/ \\Gamma(K_L -> 3 pi^0) using the KLOE detector. From a sample of ~ 10^9 phi-mesons produced at DAFNE, the Frascati phi-factory, we select ~ 1.6 10^8 K_L-mesons tagged by observing K_S -> pi^+ pi^- following the reaction e^+ e^- -> phi -> K_L K_S. From this sample we select 27,375 K_L -> gamma gamma events and obtain R = (2.79 \\pm 0.02_{stat} \\pm 0.02_{syst}) \\times 10^{-3}. Using the world average value for BR(K_{L} -> 3 pi^0), we obtain BR(K_{L} -> gamma gamma) = (5.89 \\pm 0.07 \\pm 0.08) \\times 10^{-4} where the second error is due to the uncertainty on the 3 pi^0 branching fraction.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-05-15T12:46:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "kloe detector",
      "measurement",
      "gamma gamma events",
      "world average value",
      "frascati phi-factory"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 618861
    }
  }
}