Speaker
Dr
Yoshihito Gando
(Research Center for Neutrino Science, Tohoku University)
Description
KamLAND-Zen is a neutrinoless double beta decay ($0\nu\beta\beta$) search experiment
using xenon 136 and ultra-low background environment of KamLAND
(Kamioka Liquid scintillator Anti-Neutrino Detector).
The previous project KamLAND-Zen 400 set the most strict lower limit on the half-life of
$0\nu\beta\beta$ in $^{\rm 136}$Xe, and it was terminated in 2015.
KamLAND-Zen collaboration has prepared the upgrade project KamLAND-Zen 800
with increased xenon amount and cleaner container (mini-balloon)
for xenon loaded liquid scintillator.
The new mini-balloon production was started in May 2017 and
KamLAND-Zen 800 data acquisition was started in January 2019.
In this presentation, we will explain the KamLAND-Zen 800 project
and report the detector condition, data quality, the first analysis results, and the prospects.
We also mention the next project KamLAND2-Zen and related research and developments.
Primary author
Dr
Yoshihito Gando
(Research Center for Neutrino Science, Tohoku University)
