S
S. Hatakeyama
Researcher at Tohoku University
Publications - 31
Citations - 9555
S. Hatakeyama is an academic researcher from Tohoku University. The author has contributed to research in topics: Neutrino & Neutrino oscillation. The author has an hindex of 22, co-authored 27 publications receiving 9174 citations. Previous affiliations of S. Hatakeyama include Louisiana State University.
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Journal ArticleDOI
Evidence for oscillation of atmospheric neutrinos
Y. Fukuda,T. Hayakawa,E. Ichihara,Kunio Inoue,K. Ishihara,H. Ishino,Yoshitaka Itow,Takaaki Kajita,J. Kameda,S. Kasuga,Ken-ichiro Kobayashi,Yohei Kobayashi,Yusuke Koshio,M. Miura,Masayuki Nakahata,S. Nakayama,A. Okada,Ko Okumura,N. Sakurai,Masato Shiozawa,Yoshihiro Suzuki,Y. Takeuchi,Y. Totsuka,Shinya Yamada,M. Earl,Alec Habig,E. Kearns,M. D. Messier,Kate Scholberg,J. L. Stone,Lawrence Sulak,C. W. Walter,M. Goldhaber,T. Barszczxak,D. Casper,W. Gajewski,P. G. Halverson,J. Hsu,W. R. Kropp,L. R. Price,Frederick Reines,Michael B. Smy,Henry W. Sobel,Mark R. Vagins,K. S. Ganezer,W. E. Keig,R. W. Ellsworth,S. Tasaka,J. W. Flanagan,A. Kibayashi,John G. Learned,S. Matsuno,V. J. Stenger,D. Takemori,T. Ishii,Junichi Kanzaki,T. Kobayashi,S. Mine,K. Nakamura,K. Nishikawa,Yuichi Oyama,A. Sakai,Makoto Sakuda,Osamu Sasaki,S. Echigo,M. Kohama,A. T. Suzuki,Todd Haines,Todd Haines,E. Blaufuss,B. K. Kim,R. Sanford,R. Svoboda,M. L. Chen,Z. Conner,Z. Conner,J. A. Goodman,G. W. Sullivan,J. Hill,C. K. Jung,K. Martens,C. Mauger,C. McGrew,E. Sharkey,B. Viren,C. Yanagisawa,W. Doki,Kazumasa Miyano,H. Okazawa,C. Saji,M. Takahata,Y. Nagashima,M. Takita,Takashi Yamaguchi,Minoru Yoshida,Soo-Bong Kim,M. Etoh,K. Fujita,Akira Hasegawa,Takehisa Hasegawa,S. Hatakeyama,T. Iwamoto,M. Koga,Tomoyuki Maruyama,Hiroshi Ogawa,J. Shirai,A. Suzuki,F. Tsushima,Masatoshi Koshiba,M. Nemoto,Kyoshi Nishijima,T. Futagami,Y. Hayato,Y. Kanaya,K. Kaneyuki,Y. Watanabe,D. Kielczewska,D. Kielczewska,R. A. Doyle,J. S. George,A. L. Stachyra,L. Wai,L. Wai,R. J. Wilkes,K. K. Young +124 more
Abstract: We present an analysis of atmospheric neutrino data from a 33.0 kton yr (535-day) exposure of the Super-Kamiokande detector. The data exhibit a zenith angle dependent deficit of muon neutrinos which is inconsistent with expectations based on calculations of the atmospheric neutrino flux. Experimental biases and uncertainties in the prediction of neutrino fluxes and cross sections are unable to explain our observation. The data are consistent, however, with two-flavor ${\ensuremath{
u}}_{\ensuremath{\mu}}\ensuremath{\leftrightarrow}{\ensuremath{
u}}_{\ensuremath{\tau}}$ oscillations with ${sin}^{2}2\ensuremath{\theta}g0.82$ and $5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}l\ensuremath{\Delta}{m}^{2}l6\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}3}\mathrm{eV}{}^{2}$ at 90% confidence level.
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
The Super-Kamiokande detector
S. Fukuda,Y. Fukuda,T. Hayakawa,E. Ichihara,M. Ishitsuka,Yoshitaka Itow,Takaaki Kajita,J. Kameda,K. Kaneyuki,S. Kasuga,K. Kobayashi,Y. Kobayashi,Yusuke Koshio,M. Miura,S. Moriyama,Masayuki Nakahata,S. Nakayama,Toshio Namba,Y. Obayashi,A. Okada,M. Oketa,Kimihiro Okumura,T. Oyabu,N. Sakurai,Masato Shiozawa,Yoshihiro Suzuki,Y. Takeuchi,T. Toshito,Y. Totsuka,Shoichi Yamada,S. Desai,M. Earl,J. T. Hong,E. Kearns,M. Masuzawa,M. D. Messier,M. D. Messier,J. L. Stone,L. R. Sulak,C. W. Walter,W. Wang,Kate Scholberg,T. Barszczak,David William Casper,D. W. Liu,W. Gajewski,P. G. Halverson,J. Hsu,W. R. Kropp,S. Mine,L. R. Price,Frederick Reines,M. B. Smy,Henry W. Sobel,M. R. Vagins,K. S. Ganezer,W. E. Keig,R. W. Ellsworth,S. Tasaka,J. W. Flanagan,A. Kibayashi,John G. Learned,S. Matsuno,V. J. Stenger,Y. Hayato,T. Ishii,A. K. Ichikawa,Junichi Kanzaki,T. Kobayashi,T. Maruyama,Koji Nakamura,Y. Oyama,A. Sakai,Makoto Sakuda,Osamu Sasaki,S. Echigo,T. Iwashita,M. Kohama,Atsumu Suzuki,Masaya Hasegawa,T. Inagaki,I. Kato,H. Maesaka,Tsuyoshi Nakaya,K. Nishikawa,Shuji Yamamoto,Todd Haines,Todd Haines,B. K. Kim,R. Sanford,R. Svoboda,E. Blaufuss,M. L. Chen,Z. Conner,Z. Conner,J. A. Goodman,E. Guillian,G. W. Sullivan,D. Turcan,Alec Habig,M. Ackerman,Florian Goebel,J. Hill,J. Hill,C. K. Jung,T. Kato,D. Kerr,Magdalena Malek,K. Martens,C. Mauger,C. McGrew,E. Sharkey,B. Viren,B. Viren,C. Yanagisawa,W. Doki,S. Inaba,K. Ito,M. Kirisawa,M. Kitaguchi,C. Mitsuda,K. Miyano,C. Saji,M. Takahata,M. Takahashi,K. Higuchi,Y. Kajiyama,A. Kusano,Y. Nagashima,K. Nitta,M. Takita,Takashi Yamaguchi,Minoru Yoshida,Hyosun Kim,Soo-Bong Kim,J. Yoo,H. Okazawa,M. Etoh,K. Fujita,Y. Gando,Akira Hasegawa,T. Hasegawa,S. Hatakeyama,Kunio Inoue,K. Ishihara,T. Iwamoto,M. Koga,I. Nishiyama,Hiroshi Ogawa,J. Shirai,A. Suzuki,T. Takayama,F. Tsushima,M. Koshiba,Y. Ichikawa,T. Hashimoto,Y. Hatakeyama,M. Koike,T. Horiuchi,M. Nemoto,K. Nishijima,H. Takeda,H. Fujiyasu,T. Futagami,Hirokazu Ishino,Y. Kanaya,Mikio Morii,H. Nishihama,Hiroaki Nishimura,Toshio Suzuki,Y. Watanabe,D. Kielczewska,D. Kielczewska,U. Golebiewska,H. G. Berns,S. B. Boyd,S. B. Boyd,R. A. Doyle,J. S. George,J. S. George,A. L. Stachyra,A. L. Stachyra,L. Wai,L. Wai,R. J. Wilkes,K. K. Young,H. Kobayashi +186 more
TL;DR: Super-Kamiokande is the world's largest water Cherenkov detector, with net mass 50,000 tons as discussed by the authors, which collected 1678 live-days of data, observing neutrinos from the Sun, Earth's atmosphere, and the K2K long-baseline neutrino beam with high efficiency.
Journal ArticleDOI
Measurements of the solar neutrino flux from Super-Kamiokande's first 300 days
Y. Fukuda,T. Hayakawa,E. Ichihara,Kunio Inoue,K. Ishihara,H. Ishino,Yoshitaka Itow,Takaaki Kajita,J. Kameda,S. Kasuga,K. Kobayashi,Yohei Kobayashi,Yusuke Koshio,K. Martens,M. Miura,Masayuki Nakahata,S. Nakayama,A. Okada,M. Oketa,Ko Okumura,M. Ota,N. Sakurai,Masato Shiozawa,Yasunari Suzuki,Y. Takeuchi,Y. Totsuka,Shinya Yamada,M. Earl,Alec Habig,J. T. Hong,E. Kearns,S. B. Kim,S. B. Kim,M. Masuzawa,M. D. Messier,Kate Scholberg,J. L. Stone,L. R. Sulak,C. W. Walter,M. Goldhaber,T. Barszczak,W. Gajewski,P. G. Halverson,J. Hsu,W. R. Kropp,L. R. Price,Frederick Reines,H. W. Sobel,Mark R. Vagins,K. S. Ganezer,W. E. Keig,R. W. Ellsworth,S. Tasaka,J. W. Flanagan,A. Kibayashi,John G. Learned,S. Matsuno,V. J. Stenger,D. Takemori,T. Ishii,Junichi Kanzaki,T. Kobayashi,K. Nakamura,K. Nishikawa,Yuichi Oyama,A. Sakai,Makoto Sakuda,Osamu Sasaki,S. Echigo,M. Kohama,A. T. Suzuki,Todd Haines,Todd Haines,E. Blaufuss,R. Sanford,R. Svoboda,M. L. Chen,Z. Conner,Z. Conner,J. A. Goodman,G. W. Sullivan,Masaki Mori,Masaki Mori,J. Hill,C. K. Jung,C. Mauger,C. McGrew,E. Sharkey,B. Viren,C. Yanagisawa,W. Doki,T. Ishizuka,T. Ishizuka,Y. Kitaguchi,H. Koga,Kazumasa Miyano,H. Okazawa,C. Saji,M. Takahata,A. Kusano,Y. Nagashima,M. Takita,T. Yamaguchi,Minoru Yoshida,M. Etoh,K. Fujita,Akira Hasegawa,Takehisa Hasegawa,S. Hatakeyama,T. Iwamoto,T. Kinebuchi,M. Koga,T. Maruyama,Hiroshi Ogawa,A. Suzuki,F. Tsushima,Masatoshi Koshiba,M. Nemoto,Kyoshi Nishijima,T. Futagami,Y. Hayato,Y. Kanaya,K. Kaneyuki,Y. Watanabe,D. Kielczewska,D. Kielczewska,R. A. Doyle,J. S. George,A. L. Stachyra,L. Wai,J. Wilkes,K. K. Young +131 more
TL;DR: The first results of the solar neutrino flux measurement from Super-Kamiokande are presented in this article, where the results are obtained from data taken between 31 May 1996, and 23 June 1997.
Journal ArticleDOI
Solar Neutrino Data Covering Solar Cycle 22.
Y. Fukuda,T. Hayakawa,Kunio Inoue,K. Ishihara,H. Ishino,S. Joukou,Takaaki Kajita,S. Kasuga,Yusuke Koshio,T. Kumita,T. Kumita,K. Matsumoto,Masayuki Nakahata,K. Nakamura,Ko Okumura,Akito Sakai,Masato Shiozawa,J. Suzuki,Yasunari Suzuki,T. Tomoeda,Y. Totsuka,K. S. Hirata,K. Kihara,Yuichi Oyama,M. Koshiba,K. Nishijima,T. Horiuchi,K. Fujita,S. Hatakeyama,M. Koga,T. Maruyama,A. Suzuki,Masaki Mori,T. Kajimura,T. Suda,A. T. Suzuki,T. Ishizuka,Kazumasa Miyano,H. Okazawa,T. Hara,Y. Nagashima,M. Takita,T. Yamaguchi,Y. Hayato,K. Kaneyuki,Takayuki Suzuki,Y. Takeuchi,Y. Takeuchi,Toru Tanimori,S. Tasaka,E. Ichihara,S. Miyamoto,K. Nishikawa +52 more
TL;DR: In this article, the authors presented results from 1036 days of solar neutrino data accumulated in the upgraded Kamiokande detector (KAMIOKande III) and showed that no strong correlation of the solar NE flux with the sunspot numbers was found within experimental errors.