Search for Majorana Neutrinos with 1 Ton-Year Exposure Data of KamLAND-Zen - INSPIRE

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Search for Majorana Neutrinos with 1 Ton-Year Exposure Data of KamLAND-Zen

Sei Ieki
(
- Tohoku U.
)

2024

8 pages

Contribution to:

15th Asia Pacific Physics Conference, 141-148

Published: 2024

DOI:

10.1007/978-981-96-0191-2_14

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Abstract: (Springer)

KamLAND-Zen experiment is searching for neutrinoless double-beta decay of

^{136}

Xe using a liquid scintillator detector at the Kamioka Observatory in Japan. The KamLAND-Zen detector contains 745kg of enriched xenon and we have been taking data since January 2nd, 2019. This paper reports the 1st result from the KamLAND-Zen experiment at 970 kg-yr exposure. Statistically significant excess was not observed in our region of interest (2.35

<E<

2.7 MeV), we set a limit on the neutrinoless double-beta decay half-life

T_{1/2}^{0\nu }>2.3\times 10^{26}

yr at 90% C.L. Corresponding upper limits on the effective Majorana neutrino mass is

\langle m_{\beta \beta }\rangle <(36-156)

meV using commonly adopted nuclear matrix element calculations.

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Figures(0)

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