| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-05-02 |
| タイトル |
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タイトル |
Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
S.Abe
S.Asami
M.Eizuka
S.Futagi
A.Gando
Y.Gando
T.Gima
A.Goto
T.Hachiya
K.Hata
S.Hayashida
K.Hosokawa
K.Ichimura
S.Ieki
H.Ikeda
K.Inoue
K.Ishidoshiro
Y.Kamei
N.Kawada
Y.Kishimoto
M.Koga
M.Kurasawa
N.Maemura
T.Mitsui
H.Miyake
T.Nakahata
K.Nakamura
K.Nakamura
R.Nakamura
H.Ozaki
T.Sakai
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in 136Xe using a xenon-loaded liquid scintillator. We report an improved search using an upgraded detector with almost double the amount of xenon and an ultra-low radioactivity container, corresponding to an exposure of 970 kg yr of 136Xe. This new data provides valuable insight into backgrounds, especially from cosmic muon spallation of xenon, and has required the use of novel background rejection techniques. We obtain a lower limit for the 0νββ decay half-life of T0ν1/2>2.3×1026 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. |
| 書誌情報 |
physical review letters
巻 130,
号 5,
p. 051801-051801,
発行日 2023-01
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| 出版者 |
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出版者 |
Amarican Physical Society |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1079-7114 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevLett.130.051801 |
