Y
Y. Nagashima
Researcher at Osaka University
Publications - 139
Citations - 13512
Y. Nagashima is an academic researcher from Osaka University. The author has contributed to research in topics: Neutrino & Neutrino oscillation. The author has an hindex of 42, co-authored 132 publications receiving 13044 citations.
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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
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.
Journal ArticleDOI
Observation of Large CP Violation in the Neutral B Meson System
Kazuo Abe,Y. Chao,S. Kobayashi,S. Yanaka,K. Misono,D. Liventsev,R. Kulasiri,S. E. Vahsen,Kei Suzuki,S.N. Tovey,Y. Asano,H. Kichimi,G. R. Moloney,V.N. Zhilich,A. Sidorov,H. Shibuya,M. Akatsu,E.J. Prebys,J. Tanaka,S. L. Olsen,Takashi Nakamura,D. W. Kim,Suneel Kumar,Hyunyong Kim,H. Kakuno,K. Ikeda,T. J. Gershon,M. H. Tanaka,Y. Choi,T. Mori,S. H. Lee,N. Katayama,K. Hoshina,H. Park,T. Tomura,T. Sumiyoshi,S. Okuno,Tsukasa Aso,J. W. Nam,F. Takasaki,Byung Gu Cheon,H. Miyake,Kyo Yoshida,Hirokazu Ishino,T. Tsuboyama,Kai-Feng Chen,Y. Yamashita,B. Shwartz,T. Iijima,A. Ishikawa,J. S. Lange,R. Guo,Prafulla Kumar Behera,A. Bozek,M. Rozanska,E. M. Heenan,Matthew Jones,S. Y. Suzuki,D. Zontar,Y. Watanabe,K. Inami,H. Hirano,T. Hirai,J. Yashima,S. R. Hou,K. Hara,K. Ueno,H. Hayashii,L. Y. Dong,S. Uno,Y. Sakai,J. Haba,T. Takahashi,Y. J. Kwon,Sadaharu Uehara,S. Ogawa,Hyun Woo Kim,M. E. Sevior,Y. Nagashima,Ascelin Gordon,Daniel Robert Marlow,T. Aushev,N. Kawamura,S. K. Swain,K. E. Varvell,M. Satapathy,H. Nakazawa,K. Sumisawa,Takuya Higuchi,L. E. Piilonen,F. Handa,H. Sagawa,E. Kurihara,E. Won,Masashi Yokoyama,T. Tsukamoto,N. C. Hastings,Z. Natkaniec,V. M. Aulchenko,H. Fujii,J. Kaneko,T. Hokuue,Y. Mikami,H. C. Huang,K. Kinoshita,N.I. Root,Meng Wang,Makoto Tomoto,Heejong Kim,H. Yamamoto,I. Adachi,G. N. Taylor,M. Takita,V. Eiges,K. Senyo,K. Neichi,Masaki Fukushima,O. Nitoh,R. Kagan,G. Leder,Kazunori Hanagaki,K. Korotushenko,J. G. Wang,P. Chang,R. Abe,Y. Hoshi,R. Chistov,P. Pakhlov,T. Okabe,Y. Yamada,Hirokazu Ikeda,B. D. Yabsley,J. S. Kang,T. Kuniya,Y.S. Lin,D. Beiline,Semen Eidelman,Y. Igarashi,C. W. Park,H. Yuta,M. Yamauchi,M. Yamaga,S. Behari,Rong-Shyang Lu,Yuji Enari,M. Nakao,T. Nozaki,I. Higuchi,H. Aihara,H. Tajima,M. Asai,D. J. Jackson,Go Iwai,Yasushi Nagasaka,Gianluca Alimonti,A. Sugi,Shih-Chieh Hsu,S. Koishi,H. Palka,Y. Teramoto,Hiroshi Sakamoto,T. Kawasaki,A. Sugiyama,Y. Higasino,K. Gotow,Takahiko Matsubara,T. E. Browder,N. Gabyshev,Y. Ushiroda,W. S. Hou,A. Drutskoy,P. Krokovny,Shigeki Mori,J.I. Suzuki,Koya Abe,C.W. Everton,Byoung Sup Ahn,J. Ryuko,T. Yamanaka,L. S. Peak,S. Noguchi,S. Schrenk,Chikara Fukunaga,S. Matsui,H. Guler,T. Nagamine,Yasuhiro Ohshima,T. Matsumoto,C. C. Zhang,Sun Kee Kim,Hiroyuki Iwasaki,C. H. Wang,H. Miyata,J. Dragic,Alexander Bondar,S. K. Choi,J. L. Rodriguez,T. Okazaki,K. Trabelsi,P. Kapusta,K. Miyabayashi,K. Tamai,Y. Yusa,Y. Unno,R. Itoh,Ryoji Enomoto,S. Stanič,H. K. Jang,F. Fang,Y. Iwasaki,T.H. Kim,S. Y. Suzuki,Jie Zhang,C. C. Wang,H. W. Zhao,H. Kawai,Elzbieta Banas,J. H. Kang,Y. Kawakami,A. Kuzmin,S. Matsumoto,Christos Leonidopoulos,N. Tamura,T. Hojo,Kanae Asai,K. Rybicki,Y. Zheng,Changwon Park,Masashi Hazumi,H. Konishi,E. Nakano,Y. Settai,S. Nishida,A. Satpathy,T. Nakadaira,A. Yamaguchi,M. D. Peters,T. Hara,A. Garmash,B. C. K. Casey,A. M. Bakich,M. H. Lee,Takayoshi Ohshima,L.C. Moffitt,G. F. Moorhead,H. Hamasaki,J. MacNaughton,H. Ozaki,A. Murakami,S. Semenov,Pawel Jalocha +250 more
TL;DR: The standard model CP violation parameter sin2 phi(1) is measured based on a data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider and it is concluded that the neutral B meson system is observed.
Journal ArticleDOI
Evidence for an Oscillatory Signature in Atmospheric Neutrino Oscillations
Y. Ashie,J. Hosaka,K. Ishihara,Yoshitaka Itow,J. Kameda,Yusuke Koshio,A. Minamino,C. Mitsuda,M. Miura,Shigetaka Moriyama,Masayuki Nakahata,Toshio Namba,R. Nambu,Y. Obayashi,Masato Shiozawa,Yasunari Suzuki,Y. Takeuchi,K. Taki,Shinya Yamada,Masaki Ishitsuka,Takaaki Kajita,K. Kaneyuki,Shoei Nakayama,A. Okada,Ko Okumura,T. Ooyabu,C. Saji,Y. Takenaga,Shantanu Desai,E. Kearns,S. Likhoded,J. L. Stone,L. R. Sulak,C. W. Walter,W. Wang,M. Goldhaber,David William Casper,J. P. Cravens,W. Gajewski,W. R. Kropp,D. W. Liu,S. Mine,Michael B. Smy,H. W. Sobel,C. W. Sterner,Mark R. Vagins,K. S. Ganezer,John Hill,W. E. Keig,J. S. Jang,J. Y. Kim,I. T. Lim,R. W. Ellsworth,S. Tasaka,G. Guillian,A. Kibayashi,John G. Learned,S. Matsuno,D. Takemori,M. D. Messier,Y. Hayato,A. K. Ichikawa,T. Ishida,T. Ishii,T. Iwashita,T. Kobayashi,Tomoyuki Maruyama,K. Nakamura,K. Nitta,Yuichi Oyama,Makoto Sakuda,Y. Totsuka,Atsumu Suzuki,Masaya Hasegawa,K. Hayashi,T. Inagaki,I. Kato,H. Maesaka,Taichi Morita,Tsuyoshi Nakaya,K. Nishikawa,T. Sasaki,S. Ueda,Shoji Yamamoto,Todd Haines,Todd Haines,S. Dazeley,S. Hatakeyama,R. Svoboda,E. Blaufuss,J. A. Goodman,G. W. Sullivan,D. Turcan,Kate Scholberg,Alec Habig,Y. Fukuda,C. K. Jung,T. Kato,Katsuhiro Kobayashi,Magdalena Malek,C. Mauger,C. McGrew,A. Sarrat,E. Sharkey,C. Yanagisawa,T. Toshito,Kazumasa Miyano,N. Tamura,J. Ishii,Y. Kuno,Y. Nagashima,M. Takita,Minoru Yoshida,S. B. Kim,J. Yoo,H. Okazawa,T. Ishizuka,Y. Choi,H. Seo,Y. Gando,Takehisa Hasegawa,Kunio Inoue,J. Shirai,A. Suzuki,Masatoshi Koshiba,Y. Nakajima,Kyoshi Nishijima,T. Harada,Hirokazu Ishino,R. Nishimura,Y. Watanabe,D. Kielczewska,D. Kielczewska,J. Zalipska,H. G. Berns,R. Gran,K. K. Shiraishi,A. L. Stachyra,K. Washburn,R. J. Wilkes +139 more
TL;DR: A dip in the L/E distribution was observed in the data, as predicted from the sinusoidal flavor transition probability of neutrino oscillation, which constrained nu(micro)<-->nu(tau) neutrinos oscillation parameters.