{
  "id": "hep-ex/0412012",
  "version": "v1",
  "published": "2004-12-03T15:08:33.000Z",
  "updated": "2004-12-03T15:08:33.000Z",
  "title": "Search for neutrinoless double beta decay with the NEMO-3 detector: first results",
  "authors": [
    "Xavier Sarazin"
  ],
  "comment": "5 pages, 4 figures, invited talk given at the 21st International Conference on Neutrino Physics and Astrophysics, (Neutrino 2004) 14-19 June 2004, College de France - Paris",
  "journal": "Nucl.Phys.Proc.Suppl.143:221-224,2005",
  "doi": "10.1016/j.nuclphysbps.2005.01.108",
  "categories": [
    "hep-ex"
  ],
  "abstract": "The NEMO-3 detector, which has been operating in the Frejus Underground Laboratory since February 2003, is devoted to searching for neutrinoless double beta decay (\\beta\\beta 0 \\nu). The expected performance of the detector has been successfully achieved. Half-lives of the two neutrinos double beta decay (\\beta\\beta 2 \\nu$) have been measured for ^{100} Mo, ^{82}Se, ^{96}Zr, ^{116}Cd and ^{150}Nd. After 265 days of data collection from February 2003 until March 2004, no evidence for neutrinoless double beta decay (\\beta\\beta 0 \\nu) was found from \\sim 7 kg of ^{100} Mo and \\sim 1 kg of ^{82} Se. The corresponding lower limits for the half-lives are 3.5 \\times 10^{23} years at 90% C.L for ^{100} Mo and 1.9 \\times 10^{23} years for ^{82}Se. Limits for the effective Majorana neutrino mass are < \\hspace{-0.5mm} m_{\\nu} \\hspace{-0.5mm} > < 0.7-1.2 eV for ^{100} Mo and \\linebreak < \\hspace{-0.5mm} m_{\\nu \\hspace{-0.5mm} > < 1.3-3.2 eV for ^{82}Se. Radon is the dominant background today and a Radon-free purification system will be in operation by the end of september 2004. The NEMO-3 expected sensitivity after 5 years of data is 0.2 eV.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-12-03T15:08:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutrinoless double beta decay",
      "first results",
      "radon-free purification system",
      "dominant background today",
      "neutrinos double beta decay"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 666116
    }
  }
}