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Observation of Two-Neutrino Double-Beta Decay in [superscript 136]Xe with the EXO-200 Detector

Author(s)
Waldman, Samuel J.
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Alternative title
Observation of Two-Neutrino Double-Beta Decay in 136Xe with the EXO-200 Detector
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We report the observation of two-neutrino double-beta decay in [superscript 136]Xe with T[subscript 1/2]=2.11±0.04(stat)±0.21(syst)×10[superscript 21]  yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for [superscript 136]Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.
Date issued
2011-11
URI
http://hdl.handle.net/1721.1/70884
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Ackerman, N. et al. “Observation of Two-Neutrino Double-Beta Decay in ^{136}Xe with the EXO-200 Detector.” Physical Review Letters 107.21 (2011): Web. 22 Mar. 2012. © 2011 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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