Results from KamLAND-Zen

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5 Citations (Scopus)


KamLAND-Zen has started a search for neutrino-less double beta decay with 320kg of 90% enriched 136Xe in September 2011. Results from initial 112 day of measurement are presented. It provides so far the most precise two-neutrino-mode half-life of 136Xe and the most stringent upper limit of the coupling constant of the ordinary Majoron-emitting double-beta-decay. The search for neutrino-less mode has achieved top class sensitivity but is struggling with unexpected backgrounds. Origin of the background and prospects for the future improvements are also discussed.

Original languageEnglish
Pages (from-to)249-254
Number of pages6
JournalNuclear Physics B - Proceedings Supplements
Publication statusPublished - 2013 Feb


  • Double beta decay
  • Majorana neutrino mass
  • Majoron coupling constant


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