Mar 27 – 30, 2023
Kyoto
Asia/Tokyo timezone

KamLAND-Zen Experiment

Mar 29, 2023, 5:20 PM
25m
Neutrinos Session

Speaker

Itaru Shimizu (Tohoku University)

Description

KamLAND-Zen is a double beta decay experiment with the enriched xenon-loaded liquid scintillator. Increasing the number of double beta-decay nucleus is a key to improve the sensitivity on the neutrinoless decay mode. Among a dozen of target nuclei, xenon gas is easily solved in the liquid scintillator by about 3 wt%, so the experiment with 380 kg xenon (KamLAND-Zen 400) became feasible early and demonstrated excellent sensitivity. To enhance the sensitivity, the KamLAND-Zen detector was upgraded to larger volume containing 745 kg xenon(KamLAND-Zen 800), corresponding to a twofold increase. Based on the improved analysis with 1 ton-year exposure, KamLAND-Zen has provided the most stringent on the effective neutrino mass, and started probing the inverted mass ordering region for the first time.

Primary author

Itaru Shimizu (Tohoku University)

Presentation materials