Open AccessProspects for searching new Double Beta Decay physics with KamLAND-Zen 800
Author(s) -
Yuto Kamei
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 - 10.1088/1742-6596/2156/1/012230
Subject(s) - physics , majorana , neutrino , double beta decay , nuclear physics , particle physics , decay chain , physics beyond the standard model , scintillator , radioactive decay , xenon , beta (programming language) , detector , optics , computer science , programming language
Two-neutrino double beta decay (2 υββ ) is a rare second-order weak radioactive decay process. It has been observed in neutrinoless double beta decay (0 υββ ) search experiments. Precise observation of 2 υββ is essential to reduce the theoretical uncertainty in the calculation of nuclear matrix elements required to obtain the effective Majorana mass from a lifetime of 0 υββ . Also, 2 υββ itself is interesting because new physics could be hiding in the energy spectrum, such as for example, Majoron emission mode 0 υββ and 2 υββ with neutrino self-interaction. KamLAND-Zen 800 is an experiment to search for 0 υββ of 136 Xe with a large ultra-pure liquid scintillator detector, KamLAND. KamLAND-Zen 800 has been observing 745 kg of xenon gas at 91% enriched in 136 Xe since 2019, providing a high statistics 2 υββ decay sample. We describe the potential for new physics searches in 2 υββ with KamLAND-Zen 800.