| Title: |
Search for Majorana Neutrinos with the Complete KamLAND-Zen Dataset |
| Authors: |
Abe, S; Araki, T; Chiba, K; Eda, T; Eizuka, M; Funahashi, Y; Furuto, A; Gando, A; Gando, Y; Goto, S; Hachiya, T; Hata, K; Ichimura, K; Ieki, S; Ikeda, H; Inoue, K; Ishidoshiro, K; Kamei, Y; Kawada, N; Kishimoto, Y; Koga, M; Marthe, A; Matsumoto, Y; Mitsui, T; Miyake, H; Morita, D; Nakajima, R; Nakamura, K; Nakamura, R; Nakane, J; Ono, T; Ozaki, H; Saito, K; Sakai, T; Shimizu, I; Shirai, J; Shiraishi, K; Suzuki, A; Tachibana, K; Tamae, K; Watanabe, H; Watanabe, K; Yoshida, S; Umehara, S; Fushimi, K; Kotera, K; Urano, Y; Berger, BE; Fujikawa, BK; Learned, JG; Maricic, J; Fu, Z; Ghosh, S; Smolsky, J; Winslow, LA; Efremenko, Y; Karwowski, HJ; Markoff, DM; Tornow, W; Dell’Oro, S; O’Donnell, T; Detwiler, JA; Enomoto, S; Decowski, MP; Weerman, KM; Grant, C; Penek, Ö; Song, H; Li, A; Axani, SN; Garcia, M; Sarfraz, M |
| Source: |
Physical Review Letters, vol 135, iss 26 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2025 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
5106 Nuclear and Plasma Physics (for-2020); 5107 Particle and High Energy Physics (for-2020); 51 Physical Sciences (for-2020); KamLAND-Zen Collaboration; 01 Mathematical Sciences (for); 02 Physical Sciences (for); 09 Engineering (for); General Physics (science-metrix); 40 Engineering (for-2020); 49 Mathematical sciences (for-2020) |
| Description: |
We present a search for neutrinoless double-beta ( ) decay of using the full KamLAND-Zen 800 dataset with 745kg of enriched xenon, corresponding to an exposure of 2.1ton yr of . This updated search benefits from a more than twofold increase in exposure, recovery of photo-sensor gain, and reduced background from muon-induced spallation of xenon. Combining with the search in the previous KamLAND-Zen phase, we obtain a lower limit for the decay halflife of at 90%CL, a factor of 1.7 improvement over the previous limit. The corresponding upper limits on the effective Majorana neutrino mass are in the range 28–122meV using phenomenological nuclear matrix element calculations. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt3cf513gj; https://escholarship.org/uc/item/3cf513gj; https://escholarship.org/content/qt3cf513gj/qt3cf513gj.pdf |
| DOI: |
10.1103/jkf6-48j8 |
| Availability: |
https://escholarship.org/uc/item/3cf513gj; https://escholarship.org/content/qt3cf513gj/qt3cf513gj.pdf; https://doi.org/10.1103/jkf6-48j8 |
| Rights: |
public |
| Accession Number: |
edsbas.CDE70E9F |
| Database: |
BASE |