Sep 8 – 13, 2013
Asilomar, California
US/Pacific timezone

Recent Results from the KamLAND-Zen Experiment

Sep 10, 2013, 4:00 PM
Asilomar, California

Asilomar, California

Asilomar Conference Grounds, 800 Asilomar Avenue, Pacific Grove, CA 93950-3704
Oral Double Beta Decay Double Beta Decay/ Neutrino Mass III


M. Patrick Decowski (University of Amsterdam / Nikhef)


The decade-old KamLAND neutrino detector entered a new phase two years ago, with the goal of studying neutrinoless double beta decay in ${}^{136}$Xe. To achieve this goal, the detector was augmented with a small balloon at the center of the detector, filled with liquid scintillator loaded with about 400\,kg of 91\% enriched ${}^{136}$Xe. The KamLAND-Zen collaboration recently reported on new neutrinoless double beta decay search results with an exposure of 89.5\,kg-yr to this ${}^{136}$Xe target. These findings, together with results reported by EXO-200, allow to perform the most stringent test to date on the claimed observation of $0\nu2\beta$ in ${}^{76}$Ge. An unanticipated background, most likely due to ${}^{110m}$Ag, limited KamLAND-Zen's ability to further study $0\nu2\beta$ and the collaboration embarked on a purification campaign to reduce this background. I will describe our latest $0\nu2\beta$ and $2\nu2\beta$ results, give a status of the detector and provide an outlook for the future of KamLAND-Zen.

Primary author

M. Patrick Decowski (University of Amsterdam / Nikhef)

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