Open AccessKamLAND-Zen 800 Status and Prospect with the Artificial Intelligence Powered Analysis
Author(s) -
Aobo Li
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2156/1/012114
Subject(s) - neutrino , physics , coincidence , summit , nuclear physics , particle physics , nuclear engineering , engineering , physical geography , geography , medicine , alternative medicine , pathology
The discovery of neutrinoless double beta decay (0υββ) would shed light on the persistent puzzle surrounding the origin of neutrino mass and help explain the matter-dominated universe. KamLAND-Zen is one of the leading experiments searching for 0υββ. The first phase of the experiment, called KamLAND-Zen 400, set a world-leading limit on 0υββ lifetime. After the conclusion of KamLAND-Zen 400, a brand new mini-balloon with a larger volume and cleaner surface were instrumented to contain 745 kg of 136 Xe. Since Jan. 2019, KamLAND-Zen 800 has started data-taking and aims to improve on the previous 0υββ result. A detailed study of the backgrounds in this new data will be presented along with a state-of-the-art approach for classifying backgrounds using a new algorithm called KamNet. The rejection power of KamNet does not rely on coincidence tagging and scales with hardware updates. With the help of KamNet, the 0υββ sensitivity of KamLAND-Zen 800 is significantly enhanced to a new summit.