Results from KamLAND-Zen

Open Access
Authors
  • 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. Oura
  • I. 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
Publication date 2015
Host editors
  • E. Kearns
  • G. Feldman
Book title XXVI International Conference on Neutrino Physics and Astrophysics
Book subtitle Neutrino 2014, Boston, Massachusetts, USA, 2-7 June 2014
ISBN (electronic)
  • 9780735413139
Series AIP Conference Proceedings
Event Neutrino 2014
Article number 170003
Number of pages 8
Publisher Melville, NY: AIP Publishing
Organisations
  • Faculty of Science (FNWI) - Institute of Physics (IoP)
  • Faculty of Science (FNWI)
  • Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for High Energy Physics (IHEF)
  • Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for Theoretical Physics Amsterdam (ITFA)
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 T 0ν 1/2 > 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.
Document type Conference contribution
Note © 2015 AIP Publishing LLC
Language English
Published at https://doi.org/10.1063/1.4915593
Downloads
Results from KamLAND-Zen (Final published version)
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