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Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen.

Publication ,  Journal Article
Abe, S; Asami, S; Eizuka, M; Futagi, S; Gando, A; Gando, Y; Gima, T; Goto, A; Hachiya, T; Hata, K; Hayashida, S; Hosokawa, K; Ichimura, K ...
Published in: Physical review letters
February 2023

The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in ^{136}Xe using a xenon-loaded liquid scintillator. We report an improved search using an upgraded detector with almost double the amount of xenon and an ultralow radioactivity container, corresponding to an exposure of 970 kg yr of ^{136}Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation of xenon, and have required the use of novel background rejection techniques. We obtain a lower limit for the 0νββ decay half-life of T_{1/2}^{0ν}>2.3×10^{26}  yr at 90% C.L., corresponding to upper limits on the effective Majorana neutrino mass of 36-156 meV using commonly adopted nuclear matrix element calculations.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

February 2023

Volume

130

Issue

5

Start / End Page

051801

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., … KamLAND-Zen Collaboration, . (2023). Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen. Physical Review Letters, 130(5), 051801. https://doi.org/10.1103/physrevlett.130.051801
Abe, S., S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, et al. “Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen.Physical Review Letters 130, no. 5 (February 2023): 051801. https://doi.org/10.1103/physrevlett.130.051801.
Abe S, Asami S, Eizuka M, Futagi S, Gando A, Gando Y, et al. Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen. Physical review letters. 2023 Feb;130(5):051801.
Abe, S., et al. “Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen.Physical Review Letters, vol. 130, no. 5, Feb. 2023, p. 051801. Epmc, doi:10.1103/physrevlett.130.051801.
Abe S, Asami S, Eizuka M, Futagi S, Gando A, Gando Y, Gima T, Goto A, Hachiya T, Hata K, Hayashida S, Hosokawa K, Ichimura K, Ieki S, Ikeda H, Inoue K, Ishidoshiro K, Kamei Y, Kawada N, Kishimoto Y, Koga M, Kurasawa M, Maemura N, Mitsui T, Miyake H, Nakahata T, Nakamura K, Nakamura R, Ozaki H, Sakai T, Sambonsugi H, Shimizu I, Shirai J, Shiraishi K, Suzuki A, Suzuki Y, Takeuchi A, Tamae K, Ueshima K, Watanabe H, Yoshida Y, Obara S, Ichikawa AK, Chernyak D, Kozlov A, Nakamura KZ, Yoshida S, Takemoto Y, Umehara S, Fushimi K, Kotera K, Urano Y, Berger BE, Fujikawa BK, Learned JG, Maricic J, Axani SN, Smolsky J, Fu Z, Winslow LA, Efremenko Y, Karwowski HJ, Markoff DM, Tornow W, Dell’Oro S, O’Donnell T, Detwiler JA, Enomoto S, Decowski MP, Grant C, Li A, Song H, KamLAND-Zen Collaboration. Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen. Physical review letters. 2023 Feb;130(5):051801.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

February 2023

Volume

130

Issue

5

Start / End Page

051801

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences