Measurement of the double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="bold-italic">β</mml:mi></mml:mrow></mml:math>decay half-life of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow/><mml:mn>136</mml:mn></mml:msup></mml:math>Xe with the KamLAND-Zen experiment

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Published
2012-04-19
Resource Type
journal article
Rights Information
  • http://link.aps.org/licenses/aps-default-license
  • http://link.aps.org/licenses/aps-default-accepted-manuscript-license
DOI
  • 10.1103/physrevc.85.045504
Publisher
American Physical Society (APS)

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Description

We present results from the KamLAND-Zen double-beta decay experiment based on an exposure of 77.6 days with 129 kg of $^{136}$Xe. The measured two-neutrino double-beta decay half-life of $^{136}$Xe is $T_{1/2}^{2\nu} = 2.38 \pm 0.02(stat) \pm 0.14(syst) \times 10^{21}$ yr, consistent with a recent measurement by EXO-200. We also obtain a lower limit for the neutrinoless double-beta decay half-life, $T_{1/2}^{0\nu} > 5.7 \times 10^{24}$ yr at 90% confidence level (C.L.), which corresponds to almost a five-fold improvement over previous limits.

Comment: 6 pages, 4 figures. Version as published in PRC

Journal

  • Physical Review C

    Physical Review C 85 (4), 045504-, 2012-04-19

    American Physical Society (APS)

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