H
H. Ikeda
Researcher at Tohoku University
Publications - 66
Citations - 6407
H. Ikeda is an academic researcher from Tohoku University. The author has contributed to research in topics: Neutrino & Neutrino oscillation. The author has an hindex of 21, co-authored 58 publications receiving 5804 citations.
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Journal ArticleDOI
First results from KamLAND: evidence for reactor antineutrino disappearance.
K. Eguchi,Sanshiro Enomoto,K. Furuno,J. Goldman,H. Hanada,H. Ikeda,Kiyohiro Ikeda,Kunio Inoue,K. Ishihara,W. Itoh,T. Iwamoto,Tomoya Kawaguchi,T. Kawashima,H. Kinoshita,Yasuhiro Kishimoto,M. Koga,Y. Koseki,T. Maeda,T. Mitsui,M. Motoki,K. Nakajima,M. Nakajima,T. Nakajima,Hiroshi Ogawa,K. Owada,T. Sakabe,I. Shimizu,J. Shirai,F. Suekane,A. Suzuki,K. Tada,Osamu Tajima,T. Takayama,K. Tamae,Hideki Watanabe,J. Busenitz,Z. Djurcic,K. McKinny,Dongming Mei,A. Piepke,E. Yakushev,B. E. Berger,Y. D. Chan,M. P. Decowski,D. A. Dwyer,Stuart J. Freedman,Y. Fu,B. K. Fujikawa,K. M. Heeger,K. T. Lesko,K. B. Luk,Hitoshi Murayama,D. R. Nygren,C. E. Okada,A. W. P. Poon,H. M. Steiner,Lindley Winslow,G. A. Horton-Smith,R. D. McKeown,J. Ritter,B. Tipton,Petr Vogel,C. E. Lane,T. Miletic,Peter Gorham,G. Guillian,John G. Learned,J. Maricic,S. Matsuno,Sandip Pakvasa,S. Dazeley,S. Hatakeyama,M. Murakami,R. Svoboda,B. D. Dieterle,M. DiMauro,J. A. Detwiler,Giorgio Gratta,K. Ishii,N. Tolich,Y. Uchida,M. Batygov,W. M. Bugg,H. O. Cohn,Yuri Efremenko,Yuri Kamyshkov,A. Kozlov,Y. Nakamura,L. De Braeckeleer,L. De Braeckeleer,C. R. Gould,C. R. Gould,Hugon J Karwowski,Hugon J Karwowski,D. M. Markoff,D. M. Markoff,J. A. Messimore,J. A. Messimore,Koji Nakamura,Koji Nakamura,Ryan Rohm,Ryan Rohm,Werner Tornow,Werner Tornow,Albert Young,Albert Young,Y. F. Wang +106 more
TL;DR: In the context of two-flavor neutrino oscillations with CPT invariance, all solutions to the solar neutrinos problem except for the "large mixing angle" region are excluded.
Journal ArticleDOI
Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen.
A. Gando,Y. Gando,T. Hachiya,A. Hayashi,S. Hayashida,H. Ikeda,Kunio Inoue,Koji Ishidoshiro,Y. Karino,M. Koga,S. Matsuda,T. Mitsui,K. Nakamura,S. Obara,T. Oura,H. Ozaki,I. Shimizu,Y. Shirahata,J. Shirai,A. Suzuki,T. Takai,K. Tamae,Y. Teraoka,K. Ueshima,Hideki Watanabe,A. Kozlov,Y. Takemoto,S. Yoshida,Ken-Ichi Fushimi,T. I. Banks,B. E. Berger,B. K. Fujikawa,T. O'Donnell,Lindley Winslow,Yuri Efremenko,Hugon J Karwowski,D. M. Markoff,Werner Tornow,J. A. Detwiler,Sanshiro Enomoto,M. P. Decowski +40 more
TL;DR: An improved search for neutrinoless double-beta (0νββ) decay of ^{136}Xe in the KamLAND-Zen experiment is presented and a significant reduction of the xenon-loaded liquid scintillator contaminant identified in previous searches is achieved.
Journal ArticleDOI
Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion.
T. Araki,K. Eguchi,Sanshiro Enomoto,K. Furuno,Koichi Ichimura,H. Ikeda,Kunio Inoue,K. Ishihara,K. Ishihara,T. Iwamoto,T. Iwamoto,T. Kawashima,Yasuhiro Kishimoto,M. Koga,Y. Koseki,T. Maeda,T. Mitsui,M. Motoki,K. Nakajima,Hiroshi Ogawa,K. Owada,J. S. Ricol,I. Shimizu,J. Shirai,F. Suekane,A. Suzuki,K. Tada,Osamu Tajima,K. Tamae,Y. Tsuda,Hiroko Watanabe,J. Busenitz,T. Classen,Z. Djurcic,G. Keefer,K. McKinny,Dongming Mei,Dongming Mei,A. Piepke,E. Yakushev,B. E. Berger,B. E. Berger,Y. D. Chan,Y. D. Chan,M. P. Decowski,M. P. Decowski,D. A. Dwyer,D. A. Dwyer,Stuart J. Freedman,Stuart J. Freedman,Y. Fu,Y. Fu,B. K. Fujikawa,B. K. Fujikawa,J. Goldman,J. Goldman,Frederick Gray,Frederick Gray,K. M. Heeger,K. M. Heeger,K. T. Lesko,K. T. Lesko,Kam Biu Luk,Kam Biu Luk,Hitoshi Murayama,Hitoshi Murayama,A. W. P. Poon,A. W. P. Poon,H. M. Steiner,H. M. Steiner,Lindley Winslow,Lindley Winslow,G. A. Horton-Smith,G. A. Horton-Smith,C. Mauger,R. D. McKeown,Petr Vogel,C. E. Lane,T. Miletic,Peter Gorham,G. Guillian,John G. Learned,J. Maricic,S. Matsuno,Sandip Pakvasa,S. Dazeley,S. Hatakeyama,A. Rojas,Robert Svoboda,B. D. Dieterle,J. A. Detwiler,Giorgio Gratta,K. Ishii,N. Tolich,Y. Uchida,Y. Uchida,M. Batygov,W. M. Bugg,Yuri Efremenko,Y. Kamyshkov,A. Kozlov,Y. Nakamura,C. R. Gould,C. R. Gould,Hugon J Karwowski,Hugon J Karwowski,D. M. Markoff,D. M. Markoff,J. A. Messimore,J. A. Messimore,Koji Nakamura,Koji Nakamura,Ryan Rohm,Ryan Rohm,Werner Tornow,Werner Tornow,R. Wendell,R. Wendell,Albert Young,Albert Young,M. J. Chen,Y. F. Wang,F. Piquemal +122 more
TL;DR: In this article, a study of neutrino oscillation based on a 766 ton/year exposure of KamLAND to reactor antineutrinos is presented, where the observed energy spectrum disagrees with the expected spectral shape.
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=