M
M. Otani
Researcher at Tohoku University
Publications - 9
Citations - 905
M. Otani is an academic researcher from Tohoku University. The author has contributed to research in topics: Neutrino oscillation & Solar neutrino. The author has an hindex of 6, co-authored 9 publications receiving 831 citations.
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Journal ArticleDOI
Limit on neutrinoless ββ decay of Xe136 from the first phase of KamLAND-Zen and comparison with the positive claim in Ge76
A. Gando,Y. Gando,H. Hanakago,H. Ikeda,Kunio Inoue,Kunio Inoue,Koji Ishidoshiro,R. Kato,M. Koga,M. Koga,S. Matsuda,T. Mitsui,D. Motoki,T. Nakada,K. Nakamura,K. Nakamura,A. Obata,A. Oki,Y. Ono,M. Otani,I. Shimizu,J. Shirai,A. Suzuki,Y. Takemoto,K. Tamae,K. Ueshima,Hideki Watanabe,B. D. Xu,Sumio Yamada,Hidetomo Yoshida,A. Kozlov,S. Yoshida,T. I. Banks,T. I. Banks,Stuart J. Freedman,Stuart J. Freedman,Stuart J. Freedman,B. K. Fujikawa,B. K. Fujikawa,B. K. Fujikawa,Ke Han,Ke Han,T. O'Donnell,T. O'Donnell,B. E. Berger,Yu. Efremenko,Yu. Efremenko,Hugon J Karwowski,D. M. Markoff,Werner Tornow,J. A. Detwiler,Sanshiro Enomoto,Sanshiro Enomoto,M. P. Decowski,M. P. Decowski +54 more
TL;DR: 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 <(120-250) meV based on a representative range of available matrix element calculations.
Journal ArticleDOI
Reactor On-Off Antineutrino Measurement with KamLAND
A. Gando,Y. Gando,H. Hanakago,H. Ikeda,Kunio Inoue,Kunio Inoue,Koji Ishidoshiro,H. Ishikawa,M. Koga,M. Koga,R. Matsuda,S. Matsuda,T. Mitsui,D. Motoki,K. Nakamura,K. Nakamura,A. Obata,A. Oki,Y. Oki,M. Otani,I. Shimizu,J. Shirai,A. Suzuki,Y. Takemoto,K. Tamae,K. Ueshima,Hideki Watanabe,B. D. Xu,Sumio Yamada,Y. Yamauchi,Hidetomo Yoshida,A. Kozlov,S. Yoshida,A. Piepke,A. Piepke,T. I. Banks,T. I. Banks,B. K. Fujikawa,B. K. Fujikawa,B. K. Fujikawa,Ke Han,Ke Han,T. O'Donnell,T. O'Donnell,B. E. Berger,B. E. Berger,John G. Learned,S. Matsuno,M. Sakai,Yuri Efremenko,Yuri Efremenko,Hugon J Karwowski,D. M. Markoff,Werner Tornow,J. A. Detwiler,Sanshiro Enomoto,Sanshiro Enomoto,M. P. Decowski,M. P. Decowski +58 more
TL;DR: In this article, a combined three-flavor analysis of solar and KamLAND data gives fit values for the oscillation parameters of tan2θ12=0.436+0.029−0.025, Δm221=7.53 + 0.18 − 0.002, and sin2πθ13=
Journal ArticleDOI
7Be solar neutrino measurement with KamLAND
A. Gando,Y. Gando,H. Hanakago,H. Ikeda,Kunio Inoue,Koji Ishidoshiro,H. Ishikawa,Yasuhiro Kishimoto,M. Koga,R. Matsuda,S. Matsuda,T. Mitsui,D. Motoki,K. Nakajima,K. Nakamura,A. Obata,A. Oki,Y. Oki,M. Otani,I. Shimizu,J. Shirai,A. Suzuki,K. Tamae,K. Ueshima,Hideki Watanabe,B. D. Xu,S. Yamada,Y. Yamauchi,Hidetomo Yoshida,A. Kozlov,Y. Takemoto,S. Yoshida,C. Grant,G. Keefer,D. McKee,A. Piepke,T. I. Banks,T. Bloxham,S. J. Freedman,B. K. Fujikawa,Ke Han,Leon Hsu,Koichi Ichimura,Hitoshi Murayama,T. O'Donnell,H. M. Steiner,Lindley Winslow,D. A. Dwyer,C. Mauger,R. D. McKeown,Chao Zhang,B. E. Berger,C. E. Lane,J. Maricic,T. Miletic,J. G. Learned,M. Sakai,G. A. Horton-Smith,A. Tang,K. E. Downum,K. Tolich,Yu. Efremenko,Yuri Kamyshkov,O. Perevozchikov,Hugon J Karwowski,D. M. Markoff,Werner Tornow,J. A. Detwiler,Sanshiro Enomoto,K. M. Heeger,M. P. Decowski +70 more
TL;DR: The neutrino-electron elastic scattering rate of 862 keV Be7 solar neutrinos based on a 165.4 kt d exposure of KamLAND was measured in this article.
Journal ArticleDOI
Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment
K. Asakura,A. Gando,Y. Gando,T. Hachiya,S. Hayashida,H. Ikeda,Kunio Inoue,Kunio Inoue,Koji Ishidoshiro,T. Ishikawa,S. Ishio,M. Koga,M. Koga,S. Matsuda,T. Mitsui,D. Motoki,K. Nakamura,K. Nakamura,S. Obara,M. Otani,T. Oura,I. Shimizu,Y. Shirahata,J. Shirai,A. Suzuki,H. Tachibana,K. Tamae,K. Ueshima,Hideki Watanabe,B. D. Xu,Hidetomo Yoshida,A. Kozlov,Y. Takemoto,S. Yoshida,Ken-Ichi Fushimi,T. I. Banks,B. E. Berger,B. E. Berger,B. K. Fujikawa,B. K. Fujikawa,T. O'Donnell,Lindley Winslow,Yu. Efremenko,Yu. Efremenko,Yu. Efremenko,H. J. Karwowski,D. M. Markoff,Werner Tornow,J. A. Detwiler,J. A. Detwiler,Sanshiro Enomoto,Sanshiro Enomoto,M. P. Decowski,M. P. Decowski +53 more
TL;DR: In this article, the first experimental lower half-life limits for the transitions to the 0 1 + state of 136Xe for 0 β β and 2 β β β decay were reported.
Proceedings ArticleDOI
Results from KamLAND-Zen
K. Asakura,A. Gando,Y. Gando,T. Hachiya,S. Hayashida,H. Ikeda,Kunio Inoue,Kunio Inoue,Koji Ishidoshiro,T. Ishikawa,S. Ishio,M. Koga,M. Koga,R. Matsuda,S. Matsuda,T. Mitsui,D. Motoki,K. Nakamura,K. Nakamura,S. Obara,Y. Oki,M. Otani,T. Oura,I. Shimizu,Y. Shirahata,J. Shirai,A. Suzuki,H. Tachibana,K. Tamae,K. Ueshima,Hideki Watanabe,B. D. Xu,Y. Yamauchi,Hidetomo Yoshida,Hidetomo Yoshida,A. Kozlov,Y. Takemoto,S. Yoshida,Ken-Ichi Fushimi,T. I. Banks,Stuart J. Freedman,Stuart J. Freedman,B. K. Fujikawa,B. K. Fujikawa,T. O'Donnell,Lindley Winslow,B. E. Berger,Yu. Efremenko,Yu. Efremenko,Hugon J Karwowski,D. M. Markoff,Werner Tornow,Werner Tornow,J. A. Detwiler,Sanshiro Enomoto,Sanshiro Enomoto,M. P. Decowski,M. P. Decowski +57 more
TL;DR: 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 as mentioned in this paper.