| Literature DB >> 23432237 |
A Gando1, Y Gando, H Hanakago, H Ikeda, K Inoue, K Ishidoshiro, R Kato, M Koga, S Matsuda, T Mitsui, D Motoki, T Nakada, K Nakamura, A Obata, A Oki, Y Ono, M Otani, I Shimizu, J Shirai, A Suzuki, Y Takemoto, K Tamae, K Ueshima, H Watanabe, B D Xu, S Yamada, H Yoshida, A Kozlov, S Yoshida, T I Banks, S J Freedman, B K Fujikawa, K Han, T O'Donnell, B E Berger, Y Efremenko, H J Karwowski, D M Markoff, W Tornow, J A Detwiler, S Enomoto, M P Decowski.
Abstract
We present results from the first phase of the KamLAND-Zen double-beta decay experiment, corresponding to an exposure of 89.5 kg yr of (136)Xe. We obtain a lower limit for the neutrinoless double-beta decay half-life of T(1/2)(0ν)>1.9×10(25) yr at 90% C.L. The combined results from KamLAND-Zen and EXO-200 give T(1/2)(0ν)>3.4×10(25) yr at 90% C.L., which corresponds to a Majorana neutrino mass limit of <m(ββ)> <(120-250) meV based on a representative range of available matrix element calculations. Using those calculations, this result excludes the Majorana neutrino mass range expected from the neutrinoless double-beta decay detection claim in (76)Ge, reported by a part of the Heidelberg-Moscow Collaboration, at more than 97.5% C.L.Year: 2013 PMID： 23432237 DOI： 10.1103/PhysRevLett.110.062502
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161