Results from KamLAND-Zen

Conference Paper

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.

Full Text

Duke Authors

Cited Authors

  • Asakura, K; Gando, A; Gando, Y; Hachiya, T; Hayashida, S; Ikeda, H; Inoue, K; Ishidoshiro, K; Ishikawa, T; Ishio, S; Koga, M; Matsuda, R; Matsuda, S; Mitsui, T; Motoki, D; Nakamura, K; Obara, S; Oki, Y; Otani, M; Oura, T; Shimizu, I; Shirahata, Y; Shirai, J; Suzuki, A; Tachibana, H; Tamae, K; Ueshima, K; Watanabe, H; Xu, BD; Yamauchi, Y; Yoshida, H; Kozlov, A; Takemoto, Y; Yoshida, S; Fushimi, K; Banks, TI; Freedman, SJ; Fujikawa, BK; O'donnell, T; Winslow, LA; Berger, BE; Efremenko, Y; Karwowski, HJ; Markoff, DM; Tornow, W; Detwiler, JA; Enomoto, S; Decowski, MP

Published Date

  • July 15, 2015

Published In

Volume / Issue

  • 1666 /

Electronic International Standard Serial Number (EISSN)

  • 1551-7616

International Standard Serial Number (ISSN)

  • 0094-243X

International Standard Book Number 13 (ISBN-13)

  • 9780735413139

Digital Object Identifier (DOI)

  • 10.1063/1.4915593

Citation Source

  • Scopus