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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

28 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationXXVI International Conference on Neutrino Physics and Astrophysics, Neutrino 2014
EditorsEd Kearns, Gary Feldman
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413139
DOIs
Publication statusPublished - Jul 15 2015
Externally publishedYes
Event26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 - Boston, United States
Duration: Jun 2 2014Jun 7 2014

Publication series

NameAIP Conference Proceedings
Volume1666
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014
CountryUnited States
CityBoston
Period6/2/146/7/14

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Keywords

  • Double beta decay
  • Majorana neutrino mass

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

Cite this

Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., ... Decowski, M. P. (2015). Results from KamLAND-Zen. In E. Kearns, & G. Feldman (Eds.), XXVI International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 [170003] (AIP Conference Proceedings; Vol. 1666). American Institute of Physics Inc.. https://doi.org/10.1063/1.4915593