Results from KamLAND-Zen

K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, Y. Oki, M. Otani, T. OuraI. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, Y. Yamauchi, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, T. I. Banks, S. J. Freedman, B. K. Fujikawa, T. O'donnell, L. A. Winslow, B. E. Berger, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

研究成果: Conference contribution

30 被引用数 (Scopus)

抄録

KamLAND-Zen reports on a preliminary search for neutrinoless double-beta decay with 136Xe based on 114.8 live-days after the purification of the xenon loaded liquid scintillator. In this data, the problematic 110mAg background peak identified in previous searches is reduced by more than a factor of 10. By combining the KamLAND-Zen pre- and post-purification data, we obtain a preliminary lower limit on the 0νββ decay half-life of T1/20ν>2.6×1025 yr at 90% C.L. The search sensitivity will be enhanced with additional low background data after the purification. Prospects for further improvements with future KamLAND-Zen upgrades are also presented.

本文言語English
ホスト出版物のタイトルXXVI International Conference on Neutrino Physics and Astrophysics, Neutrino 2014
編集者Ed Kearns, Gary Feldman
出版社American Institute of Physics Inc.
ISBN(電子版)9780735413139
DOI
出版ステータスPublished - 2015 7 15
イベント26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 - Boston, United States
継続期間: 2014 6 22014 6 7

出版物シリーズ

名前AIP Conference Proceedings
1666
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014
CountryUnited States
CityBoston
Period14/6/214/6/7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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