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Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Results from KamLAND-Zen double-beta decay experiment with 136Xe

Jul 5, 2012, 10:00 AM
Room 217 (Melbourne Convention and Exhibition Centre)

Room 217

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 8. Neutrinos TR 8 - Neutrinos RM 219


Dr Satoru Yamada (Tohoku University (JP))


KamLAND-Zen is an experiment for neutrino-less double-beta decay search with 136Xe. A newly constructed balloon was installed inside the current 13m diameter KamLAND balloon and filled with 136Xe loaded liquid scintillator in 2011. The data taking was started in October 2011 and the first physics results were obtained with an exposure of 77.6 days with 129 kg of 136Xe. We measured the two neutrino beta-decay half-life of 136Xe, T1/2(2nu)=2.38 ± 0.02(stat)±0.14(syst)×10^21 yr and obtained an improved lower limit for the neutrino-less double-beta decay half-life, T1/2(0nu) > 5.7×10^24 yr at 90% confidence level.

Primary author

Dr Satoru Yamada (Tohoku University (JP))

Presentation materials