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APS » Journals » Phys. Rev. D » Volume 65 » Issue 9
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Phys. Rev. D 65, 092007 (2002) [6 pages]

IGEX 76Ge neutrinoless double-beta decay experiment: Prospects for next generation experiments

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C. E. Aalseth1,*, F. T. Avignone, III1, R. L. Brodzinski2, S. Cebrian3, E. Garcia3, D. Gonzalez3, W. K. Hensley2, I. G. Irastorza3, I. V. Kirpichnikov4, A. A. Klimenko5, H. S. Miley2, A. Morales3, J. Morales3, A. Ortiz de Solorzano3, S. B. Osetrov5,†, V. S. Pogosov6, J. Puimedon3, J. H. Reeves2, M. L. Sarsa3, A. A. Smolnikov5, A. S. Starostin4, A. G. Tamanyan6, A. A. Vasenko4, S. I. Vasiliev5, and J. A. Villar3 (IGEX Collaboration)
1University of South Carolina, Columbia, South Carolina 29208
2Pacific Northwest National Laboratory, Richland, Washington 99352
3University of Zaragoza, 50009 Zaragoza, Spain
4Institute for Theoretical and Experimental Physics, 117259 Moscow, Russia
5Institute for Nuclear Research, Baksan Neutrino Observatory, 361609 Neutrino, Russia
6Yerevan Physical Institute, 375036 Yerevan, Armenia

Received 29 October 2001; published 17 May 2002

The International Germanium Experiment (IGEX) has analyzed 117 mol yr of 76Ge data from its isotopically enriched (86% 76Ge) germanium detectors. Applying pulse-shape discrimination to the more recent data, the lower bound on the half-life for neutrinoless double-beta decay of 76Ge is T1/2(0ν)>1.57×1025yr (90% C.L.). This corresponds to an upper bound in the Majorana neutrino mass parameter, 〈mν〉, between 0.33 and 1.35 eV, depending on the choice of theoretical nuclear matrix elements used in the analysis.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.092007
DOI:
10.1103/PhysRevD.65.092007
PACS:
14.60.Pq, 23.40.Bw

*Present address: Pacific Northwest National Laboratory, Richland, WA 99352.

†Present address: BioTraces Inc., Herndon, VA 20171.

 
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