APS » Phys. Rev. D » Volume 74 » Issue 3

J. Hosaka,¹ K. Ishihara,¹ J. Kameda,¹ Y. Koshio,¹ A. Minamino,¹ C. Mitsuda,¹ M. Miura,¹ S. Moriyama,¹ M. Nakahata,¹ T. Namba,¹ Y. Obayashi,¹ M. Shiozawa,¹ Y. Suzuki,¹ A. Takeda,¹ Y. Takeuchi,¹ S. Yamada,¹ I. Higuchi,² M. Ishitsuka,² T. Kajita,² K. Kaneyuki,² G. Mitsuka,² S. Nakayama,² H. Nishino,² A. Okada,² K. Okumura,² C. Saji,² Y. Takenaga,² S. Clark,³ S. Desai,³ E. Kearns,³ S. Likhoded,³ J. L. Stone,³ L. R. Sulak,³ W. Wang,³ M. Goldhaber,⁴ D. Casper,⁵ J. P. Cravens,⁵ W. R. Kropp,⁵ D. W. Liu,⁵ S. Mine,⁵ C. Regis,⁵ M. B. Smy,⁵ H. W. Sobel,⁵ C. W. Sterner,⁵ M. R. Vagins,⁵ K. S. Ganezer,⁶ J. E. Hill,⁶ W. E. Keig,⁶ J. S. Jang,⁷ J. Y. Kim,⁷ I. T. Lim,⁷ K. Scholberg,⁸ C. W. Walter,⁸ R. Wendell,⁸ R. W. Ellsworth,⁹ S. Tasaka,¹⁰ E. Guillian,¹¹ A. Kibayashi,¹¹ J. G. Learned,¹¹ S. Matsuno,¹¹ M. D. Messier,¹² Y. Hayato,¹³ A. K. Ichikawa,¹³ T. Ishida,¹³ T. Ishii,¹³ T. Iwashita,¹³ T. Kobayashi,¹³ T. Nakadaira,¹³ K. Nakamura,¹³ K. Nitta,¹³ Y. Oyama,¹³ Y. Totsuka,¹³ A. T. Suzuki,¹⁴ M. Hasegawa,¹⁵ I. Kato,¹⁵ H. Maesaka,¹⁵ T. Nakaya,¹⁵ K. Nishikawa,¹⁵ T. Sasaki,¹⁵ H. Sato,¹⁵ S. Yamamoto,¹⁵ M. Yokoyama,¹⁵ T. J. Haines,^16,5 S. Dazeley,¹⁷ S. Hatakeyama,¹⁷ R. Svoboda,¹⁷ E. Blaufuss,¹⁸ J. A. Goodman,¹⁸ G. W. Sullivan,¹⁸ D. Turcan,¹⁸ J. Cooley,¹⁹ A. Habig,²⁰ Y. Fukuda,²¹ T. Sato,²¹ Y. Itow,²² C. K. Jung,²³ T. Kato,²³ K. Kobayashi,²³ M. Malek,²³ C. Mauger,²³ C. McGrew,²³ A. Sarrat,^1,23 C. Yanagisawa,²³ N. Tamura,²⁴ M. Sakuda,²⁵ Y. Kuno,²⁶ M. Yoshida,²⁶ S. B. Kim,²⁷ J. Yoo,²⁷ T. Ishizuka,²⁸ H. Okazawa,²⁹ Y. Choi,³⁰ H. K. Seo,³⁰ Y. Gando,³¹ T. Hasegawa,³¹ K. Inoue,³¹ J. Shirai,³¹ A. Suzuki,³¹ K. Nishijima,³² H. Ishino,³³ Y. Watanabe,³³ M. Koshiba,³⁴ D. Kielczewska,^35,5 J. Zalipska,³⁵ H. G. Berns,³⁶ R. Gran,^36,20 K. K. Shiraishi,³⁶ A. Stachyra,³⁶ K. Washburn,³⁶ and R. J. Wilkes³⁶

(Super-Kamiokande Collaboration)

¹Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu, 506-1205, Japan
²Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
³Department of Physics, Boston University, Boston, Massachusetts 02215, USA
⁴Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
⁵Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA
⁶Department of Physics, California State University, Dominguez Hills, Carson, California 90747, USA
⁷Department of Physics, Chonnam National University, Kwangju 500-757, Korea
⁸Department of Physics, Duke University, Durham, North Carolina 27708 USA
⁹Department of Physics, George Mason University, Fairfax, Virginia 22030, USA
¹⁰Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan
¹¹Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
¹²Department of Physics, Indiana University, Bloomington, Indiana 47405-7105, USA
¹³High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
¹⁴Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
¹⁵Department of Physics, Kyoto University, Kyoto 606-8502, Japan
¹⁶Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
¹⁷Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
¹⁸Department of Physics, University of Maryland, College Park, Maryland 20742, USA
¹⁹Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
²⁰Department of Physics, University of Minnesota, Duluth, Minnesota 55812-2496, USA
²¹Department of Physics, Miyagi University of Education, Sendai,Miyagi 980-0845, Japan
²²Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8601, Japan
²³Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA
²⁴Department of Physics, Niigata University, Niigata, Niigata 950-2181, Japan
²⁵Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan
²⁶Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
²⁷Department of Physics, Seoul National University, Seoul 151-742, Korea
²⁸Department of Systems Engineering, Shizuoka University, Hamamatsu, Shizuoka 432-8561, Japan
²⁹Department of Informatics in Social Welfare, Shizuoka University of Welfare, Yaizu, Shizuoka 425-8611, Japan
³⁰Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
³¹Research Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
³²Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
³³Department of Physics, Tokyo Institute for Technology, Meguro, Tokyo 152-8551, Japan
³⁴University of Tokyo, Tokyo 113-0033, Japan
³⁵Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland
³⁶Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA

We report on the results of a three-flavor oscillation analysis using Super-Kamiokande I atmospheric neutrino data, with the assumption of one mass scale dominance (Deltam₁₂²=0). No significant flux change due to matter effect, which occurs when neutrinos propagate inside the Earth for theta₁₃[not-equal]0, has been seen either in a multi-GeV nu_e-rich sample or in a nu_µ-rich sample. Both normal and inverted mass hierarchy hypotheses are tested and both are consistent with observation. Using Super-Kamiokande data only, 2-dimensional 90% confidence allowed regions are obtained: mixing angles are constrained to sin²theta₁₃<0.14 and 0.37<sin²theta₂₃<0.65 for the normal mass hierarchy. Weaker constraints, sin²theta₁₃<0.27 and 0.37<sin²theta₂₃<0.69, are obtained for the inverted mass hierarchy case.

©2006 The American Physical Society

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