Search

Your search keyword '"A. L. Stachyra"' showing total 29 results
Start Over Author "A. L. Stachyra"
29 results on '"A. L. Stachyra"'

1. The landscape of high-affinity human antibodies against intratumoral antigens

Author

Goran Rakocevic, Irina Glotova, Ines de Santiago, Berke Cagkan Toptas, Milena Popovic, Milos Popovic, Dario Leone, Andrew L. Stachyra, Raphael Rozenfeld, Deniz Kural, and Daniele Biasci

Subjects
biology, Sequencing data, Cancer, RNA, medicine.disease, Molecular biology, medicine.anatomical_structure, Antigen, Cancer genome, medicine, biology.protein, Antibody, Surface plasmon resonance, B cell
Abstract

High expression of immunoglobulin transcripts is often detected in human tumours and correlates with favourable clinical outcomes across different cancer types. However, the antigens recognized by such immunoglobulins (Ig) and their biological significance remain largely unknown. We computationally inferred the paired sequence of thousands of clonally expanded Ig using bulk RNA sequencing data from solid tumors in The Cancer Genome Atlas (TCGA). After expressing 283 Ig as recombinant antibodies in mammalian cells, we individually tested them against a library of twenty thousands full-length human proteins and an additional library of six thousand structurally intact membrane proteins, thus identifying their candidate target antigens. Using surface plasmon resonance we then confirmed 16 high-affinity antibodies that bind to their targets with KD in the nanomolar range. Our work provides insights into the antigens that drive B cell responses in human cancers, while also obtaining fully human, high-affinity recombinant antibodies against them.

Published
2021

2. Fast and accurate genomic analyses using genome graphs

Author

Milos Popovic, Sun-Gou Ji, Yang Li, Peter Komar, Kaushik Ghose, James S. Spencer, Amit Jain, V. Arsenijevic, Alexey Dolgoborodov, John Browning, Jelena Nadj, Berke C. Toptas, Andrew L Stachyra, Vladimir Semenyuk, Iosif Spulber, Irina Glotova, Wan-Ping Lee, Bjoern Pollex, Deniz Kural, Lizao Li, Maria C. Suciu, Ivan E. Johnson, Morten Källberg, Gulfem Demir, and Goran Rakocevic

Subjects
Sequence analysis, Population, Single-nucleotide polymorphism, Genomics, Computational biology, Biology, computer.software_genre, Genome, Polymorphism, Single Nucleotide, 03 medical and health sciences, 0302 clinical medicine, Genetics, Humans, education, Indel, Gene, 030304 developmental biology, Sequence Deletion, education.field_of_study, 0303 health sciences, Whole Genome Sequencing, Genome, Human, Sequence Analysis, DNA, Graph, Human genetics, ComputingMethodologies_PATTERNRECOGNITION, Scalability, Data mining, computer, Sequence Alignment, 030217 neurology & neurosurgery, Reference genome
Abstract

The human reference genome serves as the foundation for genomics by providing a scaffold for sequencing read alignment, but currently only reflects a single consensus haplotype, impairing read alignment and downstream analysis accuracy. Reference genome structures incorporating known genetic variation have been shown to improve the accuracy of genomic analyses, but have so far remained computationally prohibitive for routine large-scale use. Here we present a graph genome implementation that enables read alignment across 2,800 diploid genomes encompassing 12.6 million SNPs and 4.0 million indels. Our graph genome aligner and variant calling pipeline consume around 5.5 and 2 hours per high coverage whole-genome-sequenced sample, respectively, comparable to those of state-of-the-art linear reference genome-based methods. Using orthogonal benchmarks based on real and simulated data, we show that using a graph genome reference improves read mapping sensitivity and produces a 0.5 percentage point increase in variant calling recall, which extrapolates into 20,000 additional variants being detected per sample, while variant calling specificity is unaffected. Structural variations (SVs) incorporated into a graph genome can be directly genotyped from read alignments in a rapid and accurate fashion. Finally, we show that iterative augmentation of graph genomes yields incremental gains in variant calling accuracy. Our implementation is the first practical step towards fulfilling the promise of graph genomes to radically enhance the scalability and precision of genomic analysis by incorporating prior knowledge of population characteristics.

Published
2017

3. The Super-Kamiokande detector

Author

Kimihiro Okumura, Makoto Sakuda, B. K. Kim, S. Fukuda, K. Martens, S. Moriyama, Toshio Suzuki, Todd Haines, S. B. Boyd, M. L. Chen, T. Hasegawa, Z. Conner, M. Kitaguchi, K. Nishikawa, K. S. Ganezer, Alec Habig, M. Earl, B. Viren, J. Kameda, M. Koga, H. Okazawa, R. W. Ellsworth, A. Okada, M. Takahashi, J. S. George, K. Ishihara, Atsumu Suzuki, T. Inagaki, Shoichi Yamada, Takaaki Kajita, S. Matsuno, T. Iwashita, K. Fujita, H. G. Berns, M. Ishitsuka, S. Desai, Koji Nakamura, M. Miura, Y. Ichikawa, Mikio Morii, E. Guillian, C. K. Jung, M. Takahata, H. Nishihama, J. Hsu, K. Ito, Toshio Namba, D. Kielczewska, T. Ishii, Kunio Inoue, S. Nakayama, John G. Learned, I. Kato, M. Etoh, I. Nishiyama, T. Futagami, A. L. Stachyra, K. Miyano, C. Saji, Y. Hatakeyama, T. Hayakawa, H. Maesaka, R. A. Doyle, Florian Goebel, M. B. Smy, J. L. Stone, D. W. Liu, David William Casper, E. Ichihara, T. Hashimoto, A. K. Ichikawa, C. Yanagisawa, K. Nishijima, S. Hatakeyama, M. Kohama, Akira Hasegawa, G. W. Sullivan, Henry W. Sobel, K. Nitta, Y. Kobayashi, A. Sakai, M. Takita, M. Ackerman, Frederick Reines, L. R. Price, J. Shirai, W. Wang, T. Horiuchi, H. Takeda, V. J. Stenger, M. Masuzawa, E. Sharkey, Minoru Yoshida, Yoshitaka Itow, D. Turcan, S. Inaba, N. Sakurai, T. Takayama, Y. Kanaya, M. Kirisawa, R. Svoboda, M. Koike, J. Hill, Shuji Yamamoto, A. Kusano, K. Higuchi, Hiroaki Nishimura, Masaya Hasegawa, Y. Watanabe, K. Kaneyuki, T. Kobayashi, R. Sanford, Osamu Sasaki, Magdalena Malek, Y. Kajiyama, A. Kibayashi, L. R. Sulak, W. Doki, S. Tasaka, T. Toshito, W. E. Keig, Y. Nagashima, H. Fujiyasu, J. A. Goodman, J. T. Hong, Y. Takeuchi, F. Tsushima, C. W. Walter, Soo-Bong Kim, S. Kasuga, Y. Fukuda, E. Kearns, Y. Totsuka, M. Koshiba, Hyosun Kim, C. McGrew, Yoshihiro Suzuki, K. Kobayashi, M. Nemoto, D. Kerr, T. Maruyama, Takashi Yamaguchi, M. D. Messier, S. Echigo, T. Kato, C. Mitsuda, P. G. Halverson, R. J. Wilkes, U. Golebiewska, K. K. Young, S. Mine, Y. Obayashi, Y. Gando, E. Blaufuss, Junichi Kanzaki, C. Mauger, J. Yoo, Masato Shiozawa, T. Barszczak, T. Oyabu, A. Suzuki, Tsuyoshi Nakaya, Masayuki Nakahata, Hirokazu Ishino, L. Wai, M. Oketa, J. W. Flanagan, Hiroshi Ogawa, M. R. Vagins, H. Kobayashi, W. Gajewski, Kate Scholberg, W. R. Kropp, Y. Oyama, Y. Hayato, T. Iwamoto, and Yusuke Koshio

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Cherenkov detector, Solar neutrino, High Energy Physics::Phenomenology, T2K experiment, law.invention, Neutrino detector, law, High Energy Physics::Experiment, Neutrino astronomy, Neutrino, Super-Kamiokande, Neutrino oscillation, Instrumentation
Abstract

Super-Kamiokande is the world's largest water Cherenkov detector, with net mass 50,000 tons. During the period April, 1996 to July, 2001, Super-Kamiokande I collected 1678 live-days of data, observing neutrinos from the Sun, Earth's atmosphere, and the K2K long-baseline neutrino beam with high efficiency. These data provided crucial information for our current understanding of neutrino oscillations, as well as setting stringent limits on nucleon decay. In this paper, we describe the detector in detail, including its site, configuration, data acquisition equipment, online and offline software, and calibration systems which were used during Super-Kamiokande I.

Published
2003

4. Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment

Author

David William Casper, C. W. Walter, Makoto Sakuda, C. Yanagisawa, Toshio Namba, M. H. Ahn, K. Martens, W. R. Kropp, Nobuyuki Sakurai, H. W. Sobel, S. Fukuda, Atsumu Suzuki, H. Maesaka, Takehisa Hasegawa, T. Iwashita, Minoru Yoshida, Y. Fukuda, S. H. Lim, S. B. Boyd, K. Nishikawa, S. Mine, J. L. Stone, Y. Takeuchi, K. Kaneyuki, Yuichi Oyama, E. Kearns, T. Inagaki, Shinya Yamada, Y. Totsuka, E. J. Jeon, M. Kohama, Shoei Nakayama, Koji Nakamura, S. Matsuno, H. I. Jang, Kazumasa Miyano, J. Hill, C. K. Jung, Masaya Hasegawa, M. Miura, S. B. Kim, Tomoyuki Maruyama, J. H. Choi, D. Kielczewska, Hwangseo Park, I. Kato, John G. Learned, Itsuo Nakano, L. R. Sulak, T. Ishida, A. Obayashi, E. Sharkey, Susumu Noda, H. C. Bhang, T. Ishii, N. Tamura, M. Y. Pac, Yasunari Suzuki, C. O. Kim, N. Sasao, J. S. Jang, H. Yokoyama, W. Gajewski, Kate Scholberg, Ken-ichiro Kobayashi, A. K. Ichikawa, T. Toshito, R. J. Wilkes, Shigetaka Moriyama, A. Kibayashi, J. Y. Kim, I. T. Lim, T. Hara, Shogo Nishiyama, J. Kameda, C. McGrew, M. Ishitsuka, H. So, Shigeki Aoki, J. Yoo, J. Zalipska, Takashi Kobayashi, A. Ikeda, Y. Hayato, A. L. Stachyra, Mark R. Vagins, Masato Shiozawa, Shoji Yamamoto, Tsuyoshi Nakaya, Y. Suga, F. Nakata, Beom Jun Kim, Yoshitaka Itow, Yusuke Koshio, T. Ooyabu, Masayuki Nakahata, Takaaki Kajita, C. Mauger, and A. Okada

Subjects
Physics, Tamura, Norio, Physics::Instrumentation and Detectors, Oscillation, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, High Energy Physics::Phenomenology, FOS: Physical sciences, General Physics and Astronomy, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), K2K experiment, Measurements of neutrino speed, High Energy Physics::Experiment, 田村, 詔生, Neutrino, Neutrino oscillation, Charged current
Abstract

The K2K experiment observes indications of neutrino oscillation: a reduction of $\nu_\mu$ flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in Super-Kamiokande (SK), 250 km from the neutrino production point, with an expectation of $80.1^{+6.2}_{-5.4}$. Twenty-nine one ring $\mu$-like events are used to reconstruct the neutrino energy spectrum, which is better matched to the expected spectrum with neutrino oscillation than without. The probability that the observed flux at SK is explained by statistical fluctuation without neutrino oscillation is less than 1%., Comment: 5 pages, 3 figures embedded, LaTeX with RevTeX style, accepted for publication in PRL on December 13, 2002

Published
2003

5. Determination of solar neutrino oscillation parameters using 1496 days of Super-Kamiokande-I data

Author

Masatoshi Koshiba, Takashi Kobayashi, M. Ishitsuka, Shoichi Yamada, Takaaki Kajita, A. Kibayashi, L. R. Sulak, Shantanu Desai, Y. Ichikawa, K. Kobayashi, M. D. Messier, Y. Totsuka, T. Shibata, K. Kaneyuki, M. Takita, J. Shirai, S. Tasaka, W. E. Keig, Atsumu Suzuki, M. Earl, D. W. Liu, John G. Learned, M. Etoh, R. Nishimura, Makoto Sakuda, G. W. Sullivan, A. L. Stachyra, K. Miyano, C. W. Walter, Y. Nagashima, S. Matsuno, E. Sharkey, S. Dazeley, Hyosun Kim, D. Takemori, R. Svoboda, G. Guillian, R. W. Ellsworth, C. McGrew, A. M. Gago, K. Martens, S. Moriyama, C. Saji, J. Kameda, J. L. Stone, David William Casper, S. Nakayama, Yoshihiro Suzuki, T. Ishii, Kunio Inoue, Yoshitaka Itow, M. L. Chen, D. Turč, Y. Obayashi, J. A. Goodman, C. Mitsuda, K. S. Ganezer, T. Inagaki, Y. Kajiyama, S. Hatakeyama, R. J. Wilkes, M. Goldhaber, Y. Gando, M. Koike, Toshio Namba, Henry W. Sobel, K. Nitta, M. Ackermann, Y. Fukuda, E. Kearns, B. Viren, Koji Nakamura, S. Mine, Kyoshi Nishijima, Masayuki Nakahata, K. Nishikawa, M. Miura, Y. Takeuchi, Todd Haines, M. B. Smy, S. C. Boyd, T. Ishizuka, S. Fukuda, A. K. Ichikawa, Minoru Yoshida, C. Yanagisawa, H. Okazawa, K. Ishihara, A. Suzuki, M. Kohama, T. Iwashita, J. Hill, A. Okada, N. Sakurai, H. G. Berns, Alec Habig, Y. Watanabe, Mikio Morii, E. Blaufuss, Tsuyoshi Nakaya, C. K. Jung, C. Mauger, T. Toshito, J. Yoo, D. Kielczewska, Magdalena Malek, T. Maruyama, Masato Shiozawa, I. Kato, T. Barszczak, H. Takeuchi, Y. Hatakeyama, S. B. Kim, W. R. Kropp, Y. Oyama, Y. Hayato, Yusuke Koshio, Takehisa Hasegawa, Hirokazu Ishino, M. R. Vagins, W. Gajewski, and Kate Scholberg

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Standard solar model, Solar neutrino, High Energy Physics::Phenomenology, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Neutrino, GALLEX, Super-Kamiokande, Neutrino oscillation
Abstract

A number of different fits to solar neutrino mixing and mass square difference were performed using 1496 days of Super-Kamiokande-I's solar neutrino data. These data select two allowed areas at large neutrino mixing when combined with either the solar $^8$B flux prediction of the standard solar model or the SNO interaction rate measurements. A global fit combining SK data with the solar neutrino interaction rates measured by Homestake, SNO, Gallex/GNO and SAGE prefers a single allowed area, the Large Mixing Angle solution, at the 98.9% confidence level. The mass square difference $\Delta m^2$ between the two mass eigenstates ranges from about 3 to $19\times10^{-5}$eV$^2$, while the mixing angle $\theta$ is in the range of $\tan^2\theta\approx$0.25--0.65., Comment: 10 Pages, 4 figures, submitted to Physics Letters B

Published
2002

6. SolarB8and hep Neutrino Measurements from 1258 Days of Super-Kamiokande Data

Author

Y. Watanabe, J. Hill, M. Morii, T. Toshito, Minoru Yoshida, Y. Nagashima, J. A. Goodman, Y. Oyama, S. Tasaka, W. E. Keig, Y. Hayato, C. W. Walter, Atsumu Suzuki, Yusuke Koshio, B. Lee, K. Kaneyuki, Magdalena Malek, Soo-Bong Kim, M. B. Smy, Y. Fukuda, E. Kearns, Yoshitaka Itow, K. Nishikawa, M. Takita, L. R. Price, J. Shirai, M. Koike, H. Takeuchi, A. Suzuki, B. Viren, C. Saji, E. Sharkey, S. Dazeley, G. Guillian, S. Moriyama, M. Kohama, K. Ishihara, C. Mitsuda, C. McGrew, S. Matsuno, C. K. Jung, Tsuyoshi Nakaya, Heekyong Kim, H. Okazawa, D. Kielczewska, Yoshihiro Suzuki, C. Mauger, J. Yoo, Y. Totsuka, T. Ishii, M. Goldhaber, Kunio Inoue, Masato Shiozawa, Y. Takeuchi, R. J. Wilkes, T. Barszczak, U. Golebiewska, Alec Habig, M. Earl, D. W. Liu, R. Svoboda, J. Kameda, G. W. Sullivan, Takehisa Hasegawa, Masayuki Nakahata, Y. Gando, M. Ishitsuka, Hirokazu Ishino, Y. Hatakeyama, S. Mine, Shantanu Desai, Y. Ichikawa, A. L. Stachyra, K. Miyano, Takashi Kobayashi, W. R. Kropp, Tomoyuki Maruyama, R. W. Ellsworth, J. L. Stone, Henry W. Sobel, K. Nitta, H. Fujiyasu, E. Blaufuss, Kyoshi Nishijima, T. Inagaki, M. R. Vagins, Koji Nakamura, Masatoshi Koshiba, M. Miura, W. Gajewski, Kate Scholberg, A. Kibayashi, L. R. Sulak, T. Shibata, M. D. Messier, Makoto Sakuda, S. C. Boyd, T. Ishizuka, Y. Obayashi, K. Martens, John G. Learned, K. Kobayashi, Y. Kajiyama, Shoichi Yamada, Takaaki Kajita, M. Etoh, K. S. Ganezer, Todd Haines, D. Turcan, C. Yanagisawa, A. Okada, N. Sakurai, S. Nakayama, David William Casper, A. Sakai, and D. Takemori

Subjects
Physics, Sudbury Neutrino Observatory, Particle physics, Recoil, Solar neutrino, General Physics and Astronomy, Flux, Electron, Neutrino, Super-Kamiokande, Energy (signal processing)
Abstract

Solar neutrino measurements from 1258days of data from the Super-Kamiokande detector are presented. The measurements are based on recoil electrons in the energy range 5.0{endash}20.0MeV. The measured solar neutrino flux is 2.32{+-}0.03(stat){sup +0.08}{sub {minus}0.07}(syst){times}10{sup 6} cm{sup {minus}2}s{sup {minus}1} , which is 45.1{+-}0.5(stat ){sup +1.6}{sub {minus}1.4}(syst) % of that predicted by the BP2000 SSM. The day vs night flux asymmetry ({Phi}{sub n}{minus}{Phi}{sub d})/ {Phi}{sub average} is 0.033{+-}0.022(stat){sup +0.013}{sub {minus}0.012}(syst) . The recoil electron energy spectrum is consistent with no spectral distortion. For the hep neutrino flux, we set a 90% C.L.upper limit of 40{times}10{sup 3} cm{sup {minus}2}s{sup {minus}1} , which is 4.3times the BP2000 SSM prediction.

Published
2001

7. Constraints on Neutrino Oscillations Using 1258 Days of Super-Kamiokande Solar Neutrino Data

Author

Hirokazu Ishino, H. Takeuchi, K. Kaneyuki, Makoto Sakuda, M. Ishitsuka, K. Martens, K. Kobayashi, S. Matsuno, T. Shibata, Minoru Yoshida, David William Casper, Shantanu Desai, Y. Ichikawa, A. Sakai, Y. Takeuchi, J. L. Stone, E. Blaufuss, S. Nakayama, John G. Learned, Henry W. Sobel, K. Nitta, D. Turcan, R. W. Ellsworth, Kyoshi Nishijima, A. L. Stachyra, K. Miyano, Y. Watanabe, D. Takemori, M. Etoh, G. Guillian, S. Moriyama, T. Ishii, Kunio Inoue, Tomoyuki Maruyama, C. W. Walter, T. Inagaki, Y. Hatakeyama, M. Goldhaber, B. Viren, J. Hill, M. Morii, S. Tasaka, W. E. Keig, Shoichi Yamada, Takaaki Kajita, Koji Nakamura, T. Toshito, Soo-Bong Kim, M. Takita, L. R. Price, J. Shirai, C. Yanagisawa, D. W. Liu, Yoshitaka Itow, C. K. Jung, Y. Fukuda, E. Kearns, Todd Haines, Atsumu Suzuki, D. Kielczewska, M. Miura, Takehisa Hasegawa, E. Sharkey, G. W. Sullivan, S. Fukuda, M. Koike, S. Dazeley, Masayuki Nakahata, K. Nishikawa, C. McGrew, Magdalena Malek, M. R. Vagins, N. Sakurai, A. Okada, H. Okazawa, K. Ishihara, W. Gajewski, Kate Scholberg, Yoshihiro Suzuki, H. Fujiyasu, Y. Nagashima, Y. Kajiyama, J. Kameda, K. S. Ganezer, K. B. Lee, Alec Habig, Y. Totsuka, C. Saji, J. A. Goodman, M. Earl, Takashi Kobayashi, S. C. Boyd, T. Ishizuka, Masatoshi Koshiba, Y. Obayashi, A. Kibayashi, L. R. Sulak, C. Mitsuda, R. Svoboda, R. J. Wilkes, U. Golebiewska, K. K. Young, S. Mine, M. B. Smy, M. D. Messier, M. Kohama, Heekyong Kim, C. Mauger, J. Yoo, Masato Shiozawa, T. Barszczak, Y. Gando, W. R. Kropp, A. Suzuki, Tsuyoshi Nakaya, Y. Oyama, Y. Hayato, and Yusuke Koshio

Subjects
Physics, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, High Energy Physics::Phenomenology, General Physics and Astronomy, Flux, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Super-Kamiokande, Neutrino oscillation, Zenith
Abstract

We report the result of a search for neutrino oscillations using precise measurements of the recoil electron energy spectrum and zenith angle variations of the solar neutrino flux from 1258 days of neutrino-electron scattering data in Super-Kamiokande. The absence of significant zenith angle variation and spectrum distortion places strong constraints on neutrino mixing and mass difference in a flux-independent way. Using the Super-Kamiokande flux measurement in addition, two allowed regions at large mixing are found., Comment: 6 pages, 4 figures, submitted to PRL

Published
2001

8. Tau Neutrinos Favored over Sterile Neutrinos in Atmospheric Muon Neutrino Oscillations

Author

C. Yanagisawa, Y. Takeuchi, S. Nakayama, H. Fujiyasu, Minoru Yoshida, S. Inaba, N. Sakurai, Y. Totsuka, K. S. Ganezer, M. Etoh, H. Takeuchi, C. Mitsuda, K. Kaneyuki, Y. Gando, C. W. Walter, R. J. Wilkes, U. Golebiewska, B. K. Kim, R. W. Ellsworth, Hirokazu Ishino, H. Okazawa, K. Kobayashi, K. K. Young, S. Fukuda, M. L. Chen, R. Svoboda, S. Mine, Todd Haines, M. Earl, T. Maruyama, T. Inagaki, J. Hill, Atsumu Suzuki, Koji Nakamura, Soo-Bong Kim, M. Takita, L. R. Price, J. Shirai, E. Blaufuss, A. Suzuki, M. Miura, Y. Fukuda, E. Kearns, Y. Obayashi, John G. Learned, Masatoshi Koshiba, A. Kibayashi, E. Sharkey, A. Okada, L. R. Sulak, J. L. Stone, G. W. Sullivan, Shoichi Yamada, Takaaki Kajita, C. Mauger, Masato Shiozawa, C. Saji, Henry W. Sobel, K. Nitta, T. Barszczak, J. Kameda, Y. Nagashima, Kyoshi Nishijima, K. Nishikawa, S. C. Boyd, T. Ishizuka, C. McGrew, Y. Watanabe, R. Sanford, M. D. Messier, J. A. Goodman, Yoshihiro Suzuki, M. Morii, K. Ishihara, T. Toshito, M. B. Smy, S. Matsuno, Osamu Sasaki, M. Kohama, Magdalena Malek, Ko Okumura, Takehisa Hasegawa, T. Ishii, Kunio Inoue, Alec Habig, Takashi Kobayashi, M. R. Vagins, W. Gajewski, Kate Scholberg, Masayuki Nakahata, G. Guillian, S. Moriyama, M. Takahashi, M. Goldhaber, M. Ishitsuka, Y. Ichikawa, A. L. Stachyra, K. Miyano, Y. Oyama, Y. Hayato, B. Viren, Yusuke Koshio, C. K. Jung, M. Takahata, D. Kielczewska, W. R. Kropp, Makoto Sakuda, K. Martens, David William Casper, A. Sakai, Yoshitaka Itow, M. Kirisawa, M. Koike, D. Takemori, S. Tasaka, W. E. Keig, and Y. Hatakeyama

Subjects
Physics, Sterile neutrino, Particle physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, High Energy Physics::Phenomenology, General Physics and Astronomy, Solar neutrino problem, High Energy Physics - Experiment, Cosmic neutrino background, Neutrino detector, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Neutrino astronomy
Abstract

The previously published atmospheric neutrino data did not distinguish whether muon neutrinos were oscillating into tau neutrinos or sterile neutrinos, as both hypotheses fit the data. Using data recorded in 1100 live-days of the Super-Kamiokande detector, we use three complementary data samples to study the difference in zenith angle distribution due to neutral currents and matter effects. We find no evidence favoring sterile neutrinos, and reject the hypothesis at the 99% confidence level. On the other hand, we find that oscillation between muon and tau neutrinos suffices to explain all the results in hand., Comment: 9 pages with 2 figures, submitted to PRL

Published
2000

9. Search for Proton Decay throughp→ν¯K+in a Large Water Cherenkov Detector

Author

C. W. Walter, C. Mauger, M. Koshiba, A. Okada, T. Kobayashi, Y. Hatakeyama, K. Nakamura, John G. Learned, T. Futagami, M. R. Vagins, Ko Okumura, J. Hill, V. J. Stenger, S. Kasuga, Y. Fukuda, Yuichi Oyama, G. W. Sullivan, T. Hayakawa, Ken-ichiro Kobayashi, A. T. Suzuki, Masayuki Nakahata, F. Tsushima, Akira Hasegawa, Y. Takeuchi, K. Ishihara, David William Casper, Makoto Sakuda, Kunio Inoue, S. Mine, A. Sakai, Nobuyuki Sakurai, L. R. Price, J. Shirai, Yoshitaka Itow, K. Martens, M. Kirisawa, Hiroshi Ogawa, J. S. George, Y. Kanaya, K. Nishikawa, M. Koike, H. W. Sobel, Yasunari Suzuki, M. Nemoto, J. L. Stone, K. Higuchi, Shigeki Tasaka, E. Sharkey, J. Kameda, S. Hatakeyama, Osamu Sasaki, Takehisa Hasegawa, Y. Watanabe, L. R. Sulak, R. Sanford, S. Inaba, M. B. Smy, Takaaki Kajita, H. Ishino, J. A. Goodman, Kazumasa Miyano, D. Takemori, M. Takahata, Y. Kobayashi, E. Blaufuss, S. Nakayama, K. Kaneyuki, C. Saji, M. Etoh, W. Doki, H. Okazawa, K. S. Ganezer, W. Gajewski, Kate Scholberg, D. Kielczewska, Y. Totsuka, C. McGrew, M. Earl, T. Ishii, Alec Habig, H. Fujiyasu, S. Matsuno, M. Koga, Minoru Yoshida, L. Wai, Tomoyuki Maruyama, T. J. Haines, Y. Obayashi, M. Takita, M. Miura, Takashi Yamaguchi, B. Viren, M. Takahashi, W. R. Kropp, S. Yamada, M. D. Messier, S. Echigo, R. J. Wilkes, K. K. Young, C. Yanagisawa, K. Nishijima, R. W. Ellsworth, A. Kibayashi, Y. Nagashima, H. Takeuchi, B. K. Kim, W. E. Keig, M. L. Chen, M. Goldhaber, Y. Hayato, T. Iwamoto, Yusuke Koshio, S. B. Kim, A. L. Stachyra, M. Kohama, C. K. Jung, Masato Shiozawa, T. Barszczak, E. Kearns, A. Suzuki, R. Svoboda, and Junichi Kanzaki

Subjects
Nuclear physics, Physics, Particle physics, Proton, Proton decay, Cherenkov detector, law, High Energy Physics::Phenomenology, General Physics and Astronomy, High Energy Physics::Experiment, Neutrino, Lower limit, law.invention
Abstract

We present results of a search for proton decays, $p\ensuremath{\rightarrow}\overline{\ensuremath{\nu}}{K}^{+}$, using data from a $33\mathrm{kt}\ifmmode \dot{}\else \.{}\fi{}\mathrm{yr}$ exposure of the Super-Kamiokande detector. Two decay modes of the kaon, ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}}$ and ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$, were studied. The data were consistent with the background expected from atmospheric neutrinos; therefore a lower limit on the partial lifetime of the proton $\ensuremath{\tau}/B(p\ensuremath{\rightarrow}\overline{\ensuremath{\nu}}{K}^{+})$ was found to be $6.7\ifmmode\times\else\texttimes\fi{}{10}^{32}\mathrm{years}$ at $90%$ confidence level.

Published
1999

10. Measurement of the Flux and Zenith-Angle Distribution of Upward Throughgoing Muons by Super-Kamiokande

Author

L. R. Price, J. Shirai, E. Sharkey, C. K. Jung, S. Mine, M. Takahata, D. Kielczewska, J. W. Flanagan, Y. Kanaya, Hiroshi Ogawa, Takehisa Hasegawa, Y. Hayato, Y. Watanabe, R. Sanford, J. A. Goodman, Kazumasa Miyano, Minoru Yoshida, H. Okazawa, T. Iwamoto, Ken-ichiro Kobayashi, David William Casper, E. Ichihara, C. W. Walter, Yuichi Oyama, F. Tsushima, Todd Haines, W. Doki, S. Hatakeyama, Takaaki Kajita, H. Ishino, A. Sakai, Yusuke Koshio, L. Wai, Michael B. Smy, Nobuyuki Sakurai, W. E. Keig, Mark R. Vagins, Tomoyuki Maruyama, T. Kobayashi, C. Mauger, Makoto Sakuda, Junichi Kanzaki, K. Nakamura, J. Kameda, B. Viren, M. Miura, Frederick Reines, Ko Okumura, Masatoshi Koshiba, T. Hayakawa, S. Matsuno, T. Ishii, M. D. Messier, Soo-Bong Kim, S. Kasuga, Y. Fukuda, M. Goldhaber, S. Echigo, Yasunari Suzuki, K. Martens, V. J. Stenger, A. Suzuki, R. Svoboda, A. Okada, S. Tasaka, W. R. Kropp, Atsumu Suzuki, A. Kibayashi, Masayuki Nakahata, Y. Totsuka, J. L. Stone, C. Yanagisawa, K. Fujita, E. Kearns, M. L. Chen, W. Gajewski, Kate Scholberg, Kunio Inoue, C. McGrew, K. Ishihara, M. Takita, Y. Takeuchi, K. Kaneyuki, C. Saji, M. Earl, E. Blaufuss, Shinya Yamada, M. Etoh, Masato Shiozawa, K. S. Ganezer, A. L. Stachyra, John G. Learned, Yoshitaka Itow, T. Barszczak, Kyoshi Nishijima, Takashi Yamaguchi, R. W. Ellsworth, R. A. Doyle, T. Futagami, R. J. Wilkes, K. K. Young, Y. Kobayashi, G. W. Sullivan, M. Kohama, Alec Habig, J. S. George, M. Nemoto, L. R. Sulak, M. Koga, H. W. Sobel, Osamu Sasaki, D. Takemori, Shoei Nakayama, K. Nishikawa, J. Hill, Y. Nagashima, B. K. Kim, and Akira Hasegawa

Subjects
Physics, Muon, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, Flux, High Energy Physics - Experiment, Nuclear physics, Distribution (mathematics), Angular distribution, Muon flux, High Energy Physics::Experiment, Atomic physics, Super-Kamiokande, Zenith, Energy (signal processing)
Abstract

A total of 614 upward through-going muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is 1.74+/-0.07(stat.)+/-0.02(sys.)x10^{-13}cm^{-2}s^{-1}sr^{-1} compared to an expected flux of 1.97+/-0.44(theo.)x10^{-13}cm^{-2}s^{-1}sr^{-1}. The absolute measured flux is in agreement with the prediction within the errors. However, the zenith angle dependence of the observed upward through-going muon flux does not agree with no-oscillation predictions. The observed distortion in shape is consistent with the \nu_\mu \nu_\tau oscillation hypothesis with \sin^22\theta > 0.4 and 1x10^{-3} < \Delta m^2 < 1x10^{-1} eV^{2} at 90% confidence level., Comment: 8 pages w/ 3 figures new version contains minor fixes, as it appears in PRL

Published
1999

11. Constraints on Neutrino Oscillation Parameters from the Measurement of Day-Night Solar Neutrino Fluxes at Super-Kamiokande

Author

Frederick Reines, K. Ishihara, T. Kobayashi, Kazumasa Miyano, M. Takita, Atsumu Suzuki, Shoei Nakayama, C. W. Walter, Todd Haines, Y. Totsuka, D. Takemori, E. Kearns, John G. Learned, W. Doki, C. K. Jung, M. Takahata, D. Kielczewska, Takaaki Kajita, H. Ishino, Y. Nagashima, T. Hasagawa, Takashi Yamaguchi, A. Suzuki, V. J. Stenger, C. Mauger, K. Nishikawa, T. Futagami, Y. Kanaya, T. Ishii, M. D. Messier, S. Tasaka, J. S. George, J. Hill, G. W. Sullivan, S. Echigo, R. A. Doyle, B. K. Kim, J. Hsu, K. Kaneyuki, P. G. Halverson, Soo-Bong Kim, M. Goldhaber, C. Saji, S. Kasuga, Y. Fukuda, R. Svoboda, M. Earl, M. Kohama, Minoru Yoshida, J. A. Goodman, W. R. Kropp, L. Wai, A. Okada, Y. Watanabe, R. Sanford, Y. Takeuchi, L. R. Sulak, R. J. Wilkes, Tomoyuki Maruyama, Shinya Yamada, Z. Conner, K. Fujita, K. K. Young, J. L. Stone, H. Okazawa, Y. Hayato, E. Blaufuss, K. Nakamura, David William Casper, C. Yanagisawa, Ken-ichiro Kobayashi, E. Ichihara, T. Iwamoto, H. W. Sobel, Michael B. Smy, S. Mine, A. Sakai, Yoshitaka Itow, M. Miura, Nobuyuki Sakurai, J. W. Flanagan, Yuichi Oyama, Hiroshi Ogawa, Masayuki Nakahata, T. Hayakawa, M. Etoh, A. L. Stachyra, Yusuke Koshio, F. Tsushima, W. E. Keig, Mark R. Vagins, B. Viren, K. S. Ganezer, J. Kameda, Y. Kobayashi, Osamu Sasaki, Masato Shiozawa, M. L. Chen, S. Hatakeyama, W. Gajewski, Kate Scholberg, R. W. Ellsworth, Ko Okumura, T. Barszczak, Masatoshi Koshiba, A. Kibayashi, Kunio Inoue, Kyoshi Nishijima, Makoto Sakuda, K. Martens, Junichi Kanzaki, C. McGrew, S. Matsuno, Yasunari Suzuki, Alec Habig, M. Koga, Akira Hasegawa, L. R. Price, J. Shirai, E. Sharkey, and M. Nemoto

Subjects
Physics, Sterile neutrino, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, General Physics and Astronomy, FOS: Physical sciences, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Neutrino detector, Measurements of neutrino speed, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Neutrino oscillation, Super-Kamiokande
Abstract

A search for day-night variations in the solar neutrino flux resulting from neutrino oscillations has been carried out using the 504 day sample of solar neutrino data obtained at Super-Kamiokande. The absence of a significant day-night variation has set an absolute flux independent exclusion region in the two neutrino oscillation parameter space., Comment: 11 pages, 3 figures, submitted to PRL, single-spacing

Published
1999

12. Measurement of the Solar Neutrino Energy Spectrum Using Neutrino-Electron Scattering

Author

L. R. Price, J. Shirai, D. Takemori, J. Hill, Yuichi Oyama, C. Yanagisawa, C. K. Jung, M. Takahata, M. Takita, D. Kielczewska, Y. Totsuka, E. Sharkey, Y. Nagashima, Takaaki Kajita, H. Ishino, W. E. Keig, Mark R. Vagins, C. W. Walter, R. W. Ellsworth, E. Blaufuss, Masatoshi Koshiba, F. Tsushima, M. Earl, Takashi Yamaguchi, A. Kibayashi, T. Ishii, M. D. Messier, B. K. Kim, M. Goldhaber, B. Viren, Yohei Kobayashi, M. Etoh, J. Hsu, S. Echigo, P. G. Halverson, W. R. Kropp, K. S. Ganezer, Makoto Sakuda, K. Nakamura, David William Casper, A. T. Suzuki, R. J. Wilkes, Y. Kanaya, E. Ichihara, Soo-Bong Kim, Y. Hayato, K. Fujita, C. McGrew, E. Kearns, K. K. Young, S. Kasuga, K. Martens, Y. Watanabe, A. Sakai, R. Sanford, Y. Fukuda, Masayuki Nakahata, T. Iwamoto, Y. Takeuchi, Yusuke Koshio, M. Nemoto, H. Okazawa, S. Hatakeyama, Shinya Yamada, Z. Conner, S. Nakayama, K. Kaneyuki, C. Saji, Michael B. Smy, L. R. Sulak, S. Matsuno, Junichi Kanzaki, R. A. Doyle, Yasunari Suzuki, Todd Haines, S. Mine, N. Sakurai, A. L. Stachyra, C. Mauger, Alec Habig, K. Nishikawa, M. Koga, A. Okada, J. W. Flanagan, Masato Shiozawa, M. Kohama, Hiroshi Ogawa, J. L. Stone, T. Barszczak, J. S. George, J. A. Goodman, V. J. Stenger, Takehisa Hasegawa, A. Suzuki, R. Svoboda, Ko Okumura, Kunio Inoue, T. Kobayashi, W. Gajewski, Kate Scholberg, Frederick Reines, K. Ishihara, L. Wai, Tomoyuki Maruyama, H. W. Sobel, Osamu Sasaki, Kyoshi Nishijima, T. Hayakawa, Minoru Yoshida, G. W. Sullivan, John G. Learned, M. Miura, T. Futagami, Ken-ichiro Kobayashi, Yoshitaka Itow, J. Kameda, M. L. Chen, Kazumasa Miyano, W. Doki, S. Tasaka, and Akira Hasegawa

Subjects
Physics, Particle physics, Scattering, Physics::Instrumentation and Detectors, Solar neutrino, General Physics and Astronomy, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, Recoil, Neutrino detector, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Neutrino oscillation
Abstract

A measurement of the energy spectrum of recoil electrons from solar neutrino scattering in the Super--Kamiokande detector is presented. The results shown here are obtained from 504 days of data taken between the 31st of May, 1996 and the 25th of March, 1998. The shape of the measured spectrum is compared with the expectation for solar B8 neutrinos. The comparison takes into account both kinematic and detector related effects in the measurement process. The spectral shape comparison between the observation and the expectation gives a chi-square of 25.3 with 15 degrees of freedom, corresponding to a 4.6% confidence level., Comment: 12 pages, 3 figures

Published
1999

13. Calibration of Super-Kamiokande using an electron LINAC

Author

S. Matsuno, Ko Okumura, B. Viren, Akira Hasegawa, L. R. Price, J. Shirai, C. W. Walter, Shigeki Tasaka, E. Sharkey, Hiroshi Ogawa, Takehisa Hasegawa, Y. Nagashima, B. K. Kim, W. R. Kropp, J. A. Goodman, David William Casper, E. Ichihara, Kunio Inoue, Makoto Sakuda, Soo-Bong Kim, S. Kasuga, Y. Fukuda, K. Fujita, A. Sakai, Nobuyuki Sakurai, Y. Hayato, Tomoyuki Maruyama, Takaaki Kajita, H. Ishino, Masatoshi Koshiba, A. Kibayashi, Y. Takeuchi, T. Iwamoto, A. Okada, K. Nishikawa, Shinya Yamada, Y. Totsuka, Yuichi Oyama, C. K. Jung, M. Takahata, T. Ishii, J.W Flanagan, H. Kobayashi, V. J. Stenger, S Mine, Michael B. Smy, D. Kielczewska, Y. Kobayashi, Yusuke Koshio, Z. Conner, Masayuki Nakahata, W. Gajewski, Kate Scholberg, John G. Learned, Atsumu Suzuki, F. Tsushima, A. L. Stachyra, D. Takemori, M. Etoh, E. Kearns, T. Futagami, Alec Habig, Yasunari Suzuki, J. Hsu, M. Earl, M. Koga, L. Wai, Minoru Yoshida, M. Nemoto, Frederick Reines, C. Mauger, M. Goldhaber, K. S. Ganezer, G. W. Sullivan, K. Kaneyuki, C. Saji, Mark R. Vagins, H. Okazawa, E. Blaufuss, Masato Shiozawa, J. S. George, L. R. Sulak, R. A. Doyle, C. Yanagisawa, S. Hatakeyama, T. J. Haines, T. Barszczak, Kyoshi Nishijima, M. Miura, K. Martens, R. W. Ellsworth, Ken-ichiro Kobayashi, Y. Kanaya, J. Kameda, K. Ishihara, T. Hayakawa, M. L. Chen, Y. Watanabe, R. Sanford, M. Kohama, M. Takita, C. McGrew, Shoei Nakayama, J. Hill, J. L. Stone, Koji Nakamura, Takashi Yamaguchi, Junichi Kanzaki, H. W. Sobel, Osamu Sasaki, A. Suzuki, R. Svoboda, T. Kobayashi, P. G. Halverson, R. J. Wilkes, K. K. Young, Yoshitaka Itow, M. D. Messier, S. Echigo, Kazumasa Miyano, W. Doki, and W. E. Keig

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Solar neutrino, Detector, Solar neutrino problem, Linear particle accelerator, High Energy Physics - Experiment, Nuclear physics, Neutrino detector, Physics::Accelerator Physics, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Super-Kamiokande, Instrumentation
Abstract

In order to calibrate the Super-Kamiokande experiment for solar neutrino measurements, a linear accelerator (LINAC) for electrons was installed at the detector. LINAC data were taken at various positions in the detector volume, tracking the detector response in the variables relevant to solar neutrino analysis. In particular, the absolute energy scale is now known with less than 1 percent uncertainty., Comment: 24 pages, 16 figures, Submitted to NIM A

Published
1999

14. Search for Proton Decay viap→e+π0in a Large Water Cherenkov Detector

Author

A. T. Suzuki, Makoto Sakuda, John G. Learned, T. Futagami, K. Martens, T. Ishizuka, M. Ota, T. Hayakawa, G. W. Sullivan, Yuichi Oyama, Frederick Reines, R. W. Ellsworth, F. Tsushima, K. Ishihara, K. Nakamura, W. Gajewski, Kate Scholberg, T. Kobayashi, E. Ichihara, Y. Kobayashi, Ken-ichiro Kobayashi, H. W. Sobel, M. D. Messier, A. Sakai, B. Viren, M. L. Chen, Y. Nagashima, Junichi Kanzaki, Nobuyuki Sakurai, A. Kusano, T. J. Haines, R. A. Doyle, S. Echigo, H. Koga, Osamu Sasaki, Masayuki Nakahata, Y. Takeuchi, E. Kearns, A. Suzuki, J. Kameda, J. W. Flanagan, P. G. Halverson, W. R. Kropp, Minoru Yoshida, Takaaki Kajita, S. Hatakeyama, M. Goldhaber, Hiroshi Ogawa, R. Svoboda, Z. Conner, J. L. Stone, S. Yamada, K. Fujita, Y. Hayato, Takehisa Hasegawa, J. A. Goodman, Masaki Mori, K. K. Young, Y. Totsuka, T. Iwamoto, M. R. Vagins, M. Kohama, C. Yanagisawa, M. Miura, J. Hsu, C. K. Jung, M. Takahata, T. Kinebuchi, M. Earl, Yusuke Koshio, W. E. Keig, Masato Shiozawa, H. Okazawa, Yoshitaka Itow, J. Wilkes, L. R. Sulak, K. Nishijima, T. Barszczak, C. W. Walter, T. Ishii, J. Hill, A. Kibayashi, M. Takita, M. Oketa, Alec Habig, Tomoyuki Maruyama, D. Takemori, S. Matsuno, M. Koga, A. L. Stachyra, S. Kasuga, Y. Fukuda, C. Mauger, Takashi Yamaguchi, A. Okada, J. S. George, K. Nishikawa, Kazumasa Miyano, S. Nakayama, M. Nemoto, M. Etoh, K. S. Ganezer, S. B. Kim, Akira Hasegawa, L. R. Price, W. Doki, Shigeki Tasaka, E. Sharkey, M. Koshiba, Ko Okumura, Hirokazu Ishino, Kunio Inoue, Yasunari Suzuki, L. Wai, E. Blaufuss, K. Kaneyuki, C. Saji, C. McGrew, V. J. Stenger, Y. Kitaguchi, Y. Kanaya, Y. Watanabe, R. Sanford, and D. Kielczewska

Subjects
Physics, Particle decay, Particle physics, Proton, Cherenkov detector, law, Proton decay, General Physics and Astronomy, Neutrino, Lower limit, law.invention
Abstract

We have searched for proton decay via $p\ensuremath{\rightarrow}{e}^{+}{\ensuremath{\pi}}^{0}$ using data from a $25.5\mathrm{kton}\ifmmode \dot{}\else \.{}\fi{}\mathrm{yr}$ exposure of the Super-Kamiokande detector. We find no candidate events with an expected background induced by atmospheric neutrinos of 0.1 events. From these data, we set a lower limit on the partial lifetime of the proton $\ensuremath{\tau}{/B}_{p\ensuremath{\rightarrow}{e}^{+}{\ensuremath{\pi}}^{0}}$ to be $1.6\ifmmode\times\else\texttimes\fi{}{10}^{33}\mathrm{years}$ at a 90% confidence level.

Published
1998

15. Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days

Author

T. Hayakawa, R. A. Doyle, T. Yamaguchi, J. A. Goodman, C. McGrew, M. Kohama, Y. Hayato, John G. Learned, T. Futagami, T. Ishizuka, A. T. Suzuki, Masayuki Nakahata, T. Iwamoto, M. Ota, S. Hatakeyama, Yusuke Koshio, R. W. Ellsworth, G. W. Sullivan, Minoru Yoshida, W. E. Keig, Mark R. Vagins, Masatoshi Koshiba, H. Okazawa, H. W. Sobel, Ko Okumura, M. Masuzawa, A. Kibayashi, Y. Totsuka, Osamu Sasaki, J. L. Stone, Yohei Kobayashi, M. Miura, Makoto Sakuda, J. T. Hong, H. Koga, Y. Kitaguchi, Yuichi Oyama, T. Kinebuchi, S. B. Kim, N. Sakurai, Y. Takeuchi, Takaaki Kajita, H. Ishino, M. Goldhaber, Kunio Inoue, Masaki Mori, M. Earl, T. Maruyama, Frederick Reines, T. Ishii, W. R. Kropp, Akira Hasegawa, F. Tsushima, J. Hsu, K. Nakamura, Shinya Yamada, Z. Conner, J. S. George, J. W. Flanagan, Hiroshi Ogawa, K. Kobayashi, Kyoshi Nishijima, S. Nakayama, M. D. Messier, S. Echigo, A. Kusano, S. Matsuno, J. Kameda, Yasunari Suzuki, L. Wai, M. L. Chen, Takehisa Hasegawa, K. Nishikawa, K. Ishihara, M. Takita, P. G. Halverson, Todd Haines, L. R. Price, A. L. Stachyra, D. Takemori, M. Etoh, C. W. Walter, K. Martens, J. Hill, K. S. Ganezer, C. Mauger, Y. Kanaya, E. Sharkey, Y. Watanabe, R. Sanford, B. Viren, A. Okada, M. Nemoto, C. K. Jung, M. Takahata, S. Kasuga, T. Kobayashi, D. Kielczewska, Y. Fukuda, M. Oketa, Kazumasa Miyano, L. R. Sulak, W. Doki, E. Ichihara, W. Gajewski, Kate Scholberg, S. Tasaka, A. Sakai, Yoshitaka Itow, K. Fujita, Alec Habig, M. Koga, Y. Nagashima, A. Suzuki, R. Svoboda, E. Blaufuss, V. J. Stenger, Junichi Kanzaki, Masato Shiozawa, T. Barszczak, E. Kearns, J. Wilkes, K. Kaneyuki, C. Saji, K. K. Young, and C. Yanagisawa

Subjects
Physics, Standard solar model, Particle physics, Solar neutrino, General Physics and Astronomy, Flux, Electron, High Energy Physics - Experiment, Nuclear physics, Constant rate, Recoil, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Super-Kamiokande, Energy (signal processing)
Abstract

The first results of the solar neutrino flux measurement from Super-Kamiokande are presented. The results shown here are obtained from data taken between the 31st of May, 1996, and the 23rd of June, 1997. Using our measurement of recoil electrons with energies above 6.5 MeV, we infer the total flux of 8B solar neutrinos to be 2.42+-0.06(stat.)+0.10-0.07(syst.)*10^6/cm^2/s. This result is consistent with the Kamiokande measurement and is 36% of the flux predicted by the BP95 solar model. The flux is also measured in 1.5 month subsets and shown to be consistent with a constant rate., Comment: 7 pages, 3 figures

Published
1998

16. Evidence for Oscillation of Atmospheric Neutrinos

Author

Takaaki Kajita, H. Ishino, T. Ishii, T. Kobayashi, Alec Habig, L. Wai, J. Hsu, Tomoyuki Maruyama, Y. Totsuka, M. Koga, Ken-ichiro Kobayashi, Henry W. Sobel, S. Hatakeyama, D. Takemori, Kyoshi Nishijima, V. J. Stenger, M. Earl, Yoshitaka Itow, D. Casper, B. Viren, K. Nakamura, J. Kameda, Makoto Sakuda, A. L. Stachyra, Y. Kanaya, S. Nakayama, W. R. Kropp, N. Sakurai, Masayuki Nakahata, R. A. Doyle, M. Takita, M. L. Chen, S. Matsuno, P. G. Halverson, Akira Hasegawa, K. Martens, K. Fujita, Y. Watanabe, Frederick Reines, R. Sanford, L. R. Price, J. Shirai, W. Gajewski, Kate Scholberg, Osamu Sasaki, M. Kohama, Todd Haines, E. Sharkey, R. J. Wilkes, M. Goldhaber, Takashi Yamaguchi, C. McGrew, Yoshihiro Suzuki, C. Mauger, K. K. Young, S. Mine, C. K. Jung, M. Takahata, D. Kielczewska, J. S. George, Michael B. Smy, E. Ichihara, J. A. Goodman, A. Okada, J. Hill, J. W. Flanagan, Hiroshi Ogawa, M. Nemoto, E. Blaufuss, Kazumasa Miyano, A. T. Suzuki, A. Sakai, Takehisa Hasegawa, M. Etoh, T. Hayakawa, K. Ishihara, K. S. Ganezer, G. W. Sullivan, John G. Learned, H. Okazawa, W. Doki, T. Futagami, T. Barszczxak, R. W. Ellsworth, M. D. Messier, S. Tasaka, Masatoshi Koshiba, S. Echigo, Yuichi Oyama, F. Tsushima, Minoru Yoshida, C. Yanagisawa, A. Kibayashi, Yohei Kobayashi, Y. Nagashima, M. Miura, Ko Okumura, B. K. Kim, Kunio Inoue, K. Nishikawa, A. Suzuki, R. Svoboda, C. W. Walter, Soo-Bong Kim, S. Kasuga, Y. Fukuda, Y. Takeuchi, Shinya Yamada, Z. Conner, Masato Shiozawa, Lawrence Sulak, Junichi Kanzaki, Y. Hayato, T. Iwamoto, Yusuke Koshio, E. Kearns, K. Kaneyuki, C. Saji, J. L. Stone, W. E. Keig, and Mark R. Vagins

Subjects
Physics, Particle physics, Muon, Bilepton, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, General Physics and Astronomy, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, Neutrino detector, K2K experiment, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Super-Kamiokande
Abstract

We present an analysis of atmospheric neutrino data from a 33.0 kiloton-year (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 nu_mu nu_tau oscillations with sin^2(2theta)>0.82 and 5x10^-4 < delta m^2 < 6x10^-3 eV^2 at 90% confidence level., Comment: 9 pages (two-column) with 4 figures. Small corrections to Eqn.4 and Fig.3. Final version to appear in PRL

Published
1998

17. Solar neutrino measurements in Super-Kamiokande-II

Author

D. Kielczewska, Y. Watanabe, I. Kato, M. Sugihara, K. S. Ganezer, K. Ueshima, Y. Totsuka, H. Okazawa, Y. Takeuchi, W. Wang, T. Koike, Michael B. Smy, H. Seo, Shinya Yamada, Masatoshi Koshiba, R. Terri, T. Ishizuka, T. Sato, J. L. Raaf, R. W. Ellsworth, M. Ishitsuka, Atsushi Takeda, Toshiyuki Tanaka, Atsumu Suzuki, Alec Habig, N. Tanimoto, Mark R. Vagins, R. A. Wendell, Shantanu Desai, S. Matsuno, E. Kearns, H. Maesaka, Yueh-Feng Liu, Katsuki Hiraide, J. Dunmore, David William Casper, T. Kato, C. Mitsuda, K. Nitta, Shaomin Chen, Kyoshi Nishijima, Hiroshi Sato, Hirokazu Ishino, C. Saji, Shigetaka Moriyama, T. Iida, H. Nishino, Takaaki Kajita, Y. Gando, J. S. Jang, A. K. Ichikawa, Haruki Watanabe, A. L. Stachyra, W. R. Kropp, K. Nishikawa, K. K. Shiraishi, K. Nakamura, G. Guillian, G. Mitsuka, T. Nakadaira, C. Ishihara, M. Goldhaber, T. Iwashita, Makoto Sakuda, Shoei Nakayama, I. Higuchi, H. Ishii, Frédéric Dufour, Masayuki Nakahata, Y. Idehara, Shigeki Tasaka, K. Kaneyuki, N. Tamura, S. Dazeley, J. P. Cravens, J. L. Stone, C. W. Walter, T. J. Haines, M. Ikeda, H. W. Sobel, J. Y. Kim, Yasunari Suzuki, Michael Litos, Magdalena Malek, Lawrence Sulak, C. McGrew, S. Clark, Y. Hayato, S. Likhoded, S. Mine, Y. Kuno, Shoji Yamamoto, Masashi Yokoyama, A. Minamino, R. Svoboda, E. Thrane, Y. Obayashi, Yusuke Koshio, M. Fechner, D. W. Liu, Hiroyuki Sekiya, Soo-Bong Kim, Y. Fukuda, Kate Scholberg, Tsuyoshi Nakaya, J. Yoo, Ko Okumura, Masato Shiozawa, Y. Choi, Hiroshi Ogawa, Kunio Inoue, Takehisa Hasegawa, T. Kobayashi, D. Turcan, K. Ishihara, Yuichi Oyama, K. Abe, T. Ishii, R. J. Wilkes, I. T. Lim, C. Yanagisawa, B. S. Yang, T. Ishida, Y. Furuse, M. D. Messier, H. G. Berns, Takanori Sasaki, John G. Learned, A. Sarrat, G. W. Sullivan, Yoshitaka Itow, John Hill, Katsuhiro Kobayashi, W. E. Keig, J. Kameda, Minoru Yoshida, Zhi Deng, Y. Takenaga, Masaya Hasegawa, M. Miura, K. Washburn, S. Hatakeyama, R. Gran, C. Regis, and C. K. Jung

Subjects
Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Phase (waves), Solar cycle 23, Flux, Astrophysics, Spectral line, Solar cycle, High Energy Physics - Experiment, Nuclear physics, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino oscillation, Super-Kamiokande
Abstract

The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The time-dependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured {sup 8}B total flux is (2.38{+-}0.05(stat.){sub -0.15}{sup +0.16}(sys.))x10{sup 6} cm{sup -2} s{sup -1} and the day-night difference is found to be (-6.3{+-}4.2(stat.){+-}3.7(sys.))%. There is no evidence of systematic tendencies between the first and second phases.

Published
2008

18. Three flavor neutrino oscillation analysis of atmospheric neutrinos in Super-Kamiokande

Author

T. Nakadaira, Masatoshi Koshiba, J. P. Cravens, Makoto Sakuda, C. Yanagisawa, S. Mine, Takanori Sasaki, R. A. Wendell, C. McGrew, S. Clark, Yusuke Koshio, T. Kobayashi, Mark R. Vagins, Y. Hayato, S. Likhoded, M. Goldhaber, Yuichi Oyama, Shoji Yamamoto, Yoshitaka Kuno, David William Casper, C. Mitsuda, Toshio Namba, Y. Totsuka, J. Hosaka, T. J. Haines, D. Turcan, H. Maesaka, M. Ishitsuka, Atsushi Takeda, Hiroshi Sato, T. Kato, K. Ishihara, Alec Habig, K. Washburn, Shantanu Desai, K. Nakamura, W. R. Kropp, T. Ishizuka, K. Kaneyuki, S. Matsuno, T. Ishii, K. K. Shiraishi, H. Nishino, J. Shirai, T. Iwashita, Jodi Cooley, I. Higuchi, Hirokazu Ishino, J. A. Goodman, E. Blaufuss, Y. Gando, A. L. Stachyra, Shigeki Tasaka, Masayuki Nakahata, S. Dazeley, R. W. Ellsworth, Yasunari Suzuki, C. Regis, C. K. Jung, J. S. Jang, R. J. Wilkes, I. T. Lim, Takaaki Kajita, D. Kielczewska, I. Kato, A. Sarrat, S. B. Kim, J. Y. Kim, Y. Obayashi, L. R. Sulak, M. D. Messier, S. Hatakeyama, R. Gran, C. Mauger, Yoshitaka Itow, T. Sato, A. Suzuki, A. Okada, Masashi Yokoyama, R. Svoboda, H. G. Berns, Tsuyoshi Nakaya, J. Zalipska, J. Yoo, T. Ishida, Masato Shiozawa, Y. Choi, J. G. Learned, W. E. Keig, G. W. Sullivan, Katsuhiro Kobayashi, Minoru Yoshida, Takehisa Hasegawa, Y. Takenaga, Masaya Hasegawa, M. Miura, C. W. Walter, A. Kibayashi, J. Kameda, C. W. Sterner, Henry W. Sobel, K. Nitta, Kyoshi Nishijima, Michael B. Smy, H. Seo, Shigetaka Moriyama, Shoei Nakayama, Kate Scholberg, J. Hill, Y. Fukuda, Y. Takeuchi, Shinya Yamada, N. Tamura, J. L. Stone, W. Wang, A. K. Ichikawa, Atsumu Suzuki, E. Kearns, C. Saji, Y. Watanabe, G. Mitsuka, K. S. Ganezer, H. Okazawa, E. Guillian, A. Minamino, D. W. Liu, M. Malek, Ko Okumura, Kunio Inoue, and K. Nishikawa

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Neutrino detector, Invariant mass, Weinberg angle, High Energy Physics::Experiment, Neutrino, Super-Kamiokande, Mass hierarchy, Neutrino oscillation, Particle identification, High Energy Physics - Experiment
Abstract

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 ($\Delta m_{12}^2$$=$0). No significant flux change due to matter effect, which occurs when neutrinos propagate inside the Earth for $\theta_{13}$$\neq$0, has been seen either in a multi-GeV $\nu_e$-rich sample or in a $\nu_\mu$-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 $\sin^2\theta_{13} < 0.14$ and $0.37 < \sin^2\theta_{23} < 0.65$ for the normal mass hierarchy. Weaker constraints, $\sin^2\theta_{13} < 0.27$ and $0.37 < \sin^2\theta_{23} < 0.69$, are obtained for the inverted mass hierarchy case., Comment: 7 figures, 3 tables

Published
2006

19. Observation of the Anisotropy of 10 TeV Primary Cosmic Ray Nuclei Flux with the Super-Kamiokande-I Detector

Author

C. W. Walter, M. Ishitsuka, Atsushi Takeda, D. Turcan, Shantanu Desai, Y. Fukuda, K. Ishihara, K. Washburn, C. Yanagisawa, Y. Totsuka, W. Wang, J. L. Stone, T. Nakadaira, G. Mitsuka, S. Hatakeyama, R. Gran, Atsumu Suzuki, A. L. Stachyra, Michael B. Smy, Makoto Sakuda, G. Guillian, H. Okazawa, John Hill, E. Kearns, Masatoshi Koshiba, J. Griskevich, Y. Takeuchi, Shinya Yamada, Alec Habig, A. K. Ichikawa, S. Matsuno, Minoru Yoshida, R. J. Wilkes, K. Nishikawa, T. Kobayashi, M. Goldhaber, J. Shirai, Shigeki Tasaka, E. Sharkey, S. Dazeley, David William Casper, C. Mitsuda, S. Mine, T. Ishizuka, Takehisa Hasegawa, Hirokazu Ishino, J. Hosaka, H. Ogawa, Y. Takenaga, Masaya Hasegawa, M. Miura, E. Blaufuss, Y. Watanabe, J. G. Learned, A. Suzuki, C. McGrew, R. W. Ellsworth, G. W. Sullivan, Yusuke Koshio, K. Nakamura, Y. Hayato, Masashi Yokoyama, Ko Okumura, T. Ishii, K. K. Shiraishi, Katsuhiro Kobayashi, Toshio Namba, R. Svoboda, Masayuki Nakahata, Kunio Inoue, S. B. Kim, H. Maesaka, Shoji Yamamoto, K. Kaneyuki, A. Minamino, Mark R. Vagins, Hiroshi Sato, D. W. Liu, L. R. Sulak, M. Malek, H. Nishino, Yasunari Suzuki, T. Kato, K. S. Ganezer, W. Gajewski, Kate Scholberg, Tsuyoshi Nakaya, Takaaki Kajita, J. Yoo, C. K. Jung, Masato Shiozawa, D. Kielczewska, A. Kibayashi, Y. Gando, I. Kato, J. Kameda, Y. Obayashi, W. R. Kropp, T. Iwashita, I. Higuchi, C. Saji, Todd Haines, M. D. Messier, C. Mauger, A. Okada, H. G. Berns, T. Ishida, H. W. Sobel, K. Nitta, Kyoshi Nishijima, Shigetaka Moriyama, Shoei Nakayama, Yuichi Oyama, W. E. Keig, J. A. Goodman, Yoshitaka Itow, and Kazuoki Munakata

Subjects
Physics, Nuclear and High Energy Physics, Muon, Detector, Astrophysics (astro-ph), Flux, Astronomy, FOS: Physical sciences, Cosmic ray, Astrophysics, High Energy Physics - Phenomenology, Amplitude, High Energy Physics - Phenomenology (hep-ph), Primary (astronomy), High Energy Physics::Experiment, Super-Kamiokande, Anisotropy
Abstract

The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the right ascension axis has a first harmonic amplitude of $(6.64 \pm 0.98 {stat.} \pm 0.55 {syst.}) \times 10^{-4}$ and a phase at maximum at $(33.2^\circ \pm 8.2^\circ {stat.} \pm 5.1^\circ {syst.})$ right ascension. A sky map in equatorial coordinates indicates an excess region in the constellation of Taurus and a deficit region toward Virgo. The excess region is centered at $(\alpha_T, \delta_T) = (75^\circ \pm 7^\circ, -5^\circ \pm 9^\circ)$ with a half opening angle $\chi_T = (39 \pm 7)^\circ$; the excess flux is ($0.104 \pm 0.020$)% above the isotropic expectation. The corresponding parameters for the deficit region are $(\alpha_V, \delta_V) = (205^\circ \pm 7^\circ, 5^\circ \pm 10^\circ)$, $\chi_V = (54 \pm 7)^\circ$, and $(-0.094 \pm 0.014)$%. The data do not allow us to rule out a pure dipole form for the anisotropy (allowed at 13% confidence level); they are better described by the excess and deficit cones described above. We explored the implications under the assumption that the true anisotropy is not distorted too much by the analysis filter so that it is well-described by the observed excess and deficit cones., Comment: 18 pages, 11 figures, submitted for publication in Phys. Rev. D

Published
2005

20. Measurement of atmospheric neutrino oscillation parameters by Super-Kamiokande I

Author

G. Guillian, C. Yanagisawa, M. Goldhaber, A. K. Ichikawa, K. Kaneyuki, A. Minamino, Y. Watanabe, S. Mine, D. W. Liu, Atsumu Suzuki, S. Matsuno, E. Kearns, T. Toshito, Hirokazu Ishino, M. Ishitsuka, Y. Totsuka, A. Suzuki, C. W. Walter, Ko Okumura, R. Svoboda, D. Turcan, Shantanu Desai, Y. Nakajima, K. Ishihara, J. P. Cravens, Y. Ashie, C. McGrew, S. Clark, R. J. Wilkes, Tsuyoshi Nakaya, Kunio Inoue, Y. Hayato, K. Taki, T. Sasaki, C. Saji, J. Yoo, A. L. Stachyra, K. Nishikawa, I. T. Lim, Masato Shiozawa, A. Kibayashi, K. S. Ganezer, J. Kameda, Shoji Yamamoto, T. Kato, N. Tamura, L. R. Sulak, C. W. Sterner, E. Blaufuss, J. Shirai, Y. Fukuda, Magdalena Malek, J. L. Stone, E. Sharkey, S. Dazeley, Yoshitaka Itow, Takashi Kobayashi, K. Hayashi, Y. Gando, Yusuke Koshio, Koji Nakamura, Y. Takeuchi, K. Washburn, Mark R. Vagins, John G. Learned, T. Iwashita, H. Okazawa, S. Ueda, T. Maruyama, S. Likhoded, Shinya Yamada, R. Nambu, W. Wang, S. Hatakeyama, Y. Kuno, R. Gran, Kazumasa Miyano, Henry W. Sobel, K. Nitta, Michael B. Smy, H. Seo, Takehisa Hasegawa, Kyoshi Nishijima, J. A. Goodman, Alec Habig, W. R. Kropp, G. W. Sullivan, John Hill, C. K. Jung, D. Kielczewska, Shigetaka Moriyama, J. S. Jang, D. Takemori, Yuichi Oyama, I. Kato, Shoei Nakayama, Katsuhiro Kobayashi, Minoru Yoshida, Y. Obayashi, T. Harada, S. Tasaka, W. E. Keig, T. Ishii, W. Gajewski, Kate Scholberg, S. B. Kim, David William Casper, Masayuki Nakahata, C. Mitsuda, J. Hosaka, Y. Takenaga, Masaya Hasegawa, M. Miura, K. K. Shiraishi, Yoshihiro Suzuki, Masatoshi Koshiba, J. Ishii, J. Zalipska, T. Ishida, Makoto Sakuda, A. Sarrat, Todd Haines, M. D. Messier, C. Mauger, A. Okada, H. G. Berns, T. Ishizuka, Taichi Morita, R. W. Ellsworth, Takaaki Kajita, Y. Choi, J. Y. Kim, Toshio Namba, and H. Maesaka

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, High Energy Physics::Phenomenology, Monte Carlo method, High Energy Physics - Experiment, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Super-Kamiokande, Charged current, Energy (signal processing)
Abstract

We present a combined analysis of fully-contained, partially-contained and upward-going muon atmospheric neutrino data from a 1489 day exposure of the Super--Kamiokande detector. The data samples span roughly five decades in neutrino energy, from 100 MeV to 10 TeV. A detailed Monte Carlo comparison is described and presented. The data is fit to the Monte Carlo expectation, and is found to be consistent with neutrino oscillations of $\nu_\mu \leftrightarrow \nu_\tau$ with $\sin^22\theta > 0.92$ and $1.5\times 10^{-3} < \Delta m^2 < 3.4\times 10^{-3}{\rm eV}^2$ at 90% confidence level., Comment: 32 pages, 44 figures. As accepted for publication in Physical Review D

Published
2005

21. Evidence for an oscillatory signature in atmospheric neutrino oscillations

Author

Toshio Namba, J. Yoo, J. P. Cravens, Masato Shiozawa, Shantanu Desai, Atsumu Suzuki, W. Gajewski, Kate Scholberg, Y. Totsuka, H. Maesaka, T. Sasaki, E. Kearns, Mark R. Vagins, Y. Takeuchi, Shinya Yamada, E. Blaufuss, Y. Nagashima, Masaki Ishitsuka, A. L. Stachyra, J. Zalipska, C. McGrew, J. Shirai, A. Suzuki, Takaaki Kajita, R. Nishimura, Makoto Sakuda, Y. Hayato, K. Taki, R. Svoboda, G. Guillian, A. Kibayashi, E. Sharkey, S. Dazeley, Y. Watanabe, Hirokazu Ishino, L. R. Sulak, J. Kameda, Ko Okumura, C. Yanagisawa, S. Likhoded, Yoshitaka Itow, W. R. Kropp, Shoji Yamamoto, C. W. Walter, M. Goldhaber, C. Saji, Y. Kuno, M. Takita, Y. Ashie, C. W. Sterner, Tsuyoshi Nakaya, K. Nakamura, T. Toshito, K. Washburn, K. Hayashi, S. Mine, Kunio Inoue, S. Hatakeyama, R. Gran, Y. Gando, H. Okazawa, Tomoyuki Maruyama, T. Ooyabu, A. Minamino, T. Ishida, John G. Learned, H. W. Sobel, W. Wang, Masayuki Nakahata, T. Iwashita, K. Kaneyuki, Y. Fukuda, R. Nambu, A. Sarrat, D. W. Liu, T. Ishizuka, C. K. Jung, Alec Habig, S. Matsuno, S. Ueda, Minoru Yoshida, D. Takemori, D. Kielczewska, Magdalena Malek, Todd Haines, N. Tamura, Yasunari Suzuki, Y. Choi, M. D. Messier, K. Nishikawa, G. W. Sullivan, J. L. Stone, T. Inagaki, Kazumasa Miyano, Taichi Morita, R. W. Ellsworth, T. Kobayashi, C. Mauger, Takehisa Hasegawa, Masatoshi Koshiba, J. S. Jang, T. Ishii, A. Okada, I. Kato, H. G. Berns, Yusuke Koshio, John Hill, Michael B. Smy, Katsuhiro Kobayashi, J. Ishii, Y. Takenaga, H. Seo, Masaya Hasegawa, M. Miura, David William Casper, T. Harada, C. Mitsuda, R. J. Wilkes, Y. Obayashi, J. Hosaka, K. Nitta, S. Tasaka, W. E. Keig, S. B. Kim, Kyoshi Nishijima, J. Y. Kim, D. Turcan, I. T. Lim, Y. Nakajima, K. K. Shiraishi, K. Ishihara, T. Kato, Shigetaka Moriyama, Yuichi Oyama, J. A. Goodman, Shoei Nakayama, A. K. Ichikawa, and K. S. Ganezer

Subjects
Physics, Particle physics, Tamura, Norio, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, General Physics and Astronomy, High Energy Physics - Experiment, Distribution (mathematics), Measurements of neutrino speed, 田村, 詔生, High Energy Physics::Experiment, Muon neutrino, Atmospheric neutrino, Neutrino, Signature (topology), Neutrino oscillation, Energy (signal processing)
Abstract

Muon neutrino disappearance probability as a function of neutrino flight length L over neutrino energy E was studied. A dip in the L/E distribution was observed in the data, as predicted from the sinusoidal flavor transition probability of neutrino oscillation. The observed L/E distribution constrained nu_mu nu_tau neutrino oscillation parameters; 1.9x10^-3 < Delta m^2 < 3.0x10^-3 eV^2 and \sin^2(2theta) > 0.90 at 90% confidence level., Comment: 5 pages, 5 figures, submitted to PRL

Published
2004

22. Search for periodic modulations of the solar neutrino flux in Super-Kamiokande-I

Author

J. Yoo, Y. Ashie, S. Fukuda, Y. Fukuda, K. Ishihara, Y. Itow, Y. Koshio, A. Minamino, M. Miura, S. Moriyama, M. Nakahata, T. Namba, R. Nambu, Y. Obayashi, N. Sakurai, M. Shiozawa, Y. Suzuki, H. Takeuchi, Y. Takeuchi, S. Yamada, M. Ishitsuka, T. Kajita, K. Kaneyuki, S. Nakayama, A. Okada, T. Ooyabu, C. Saji, S. Desai, M. Earl, E. Kearns, M. D. Messier, J. L. Stone, L. R. Sulak, C. W. Walter, M. Goldhaber, T. Barszczak, D. Casper, W. Gajewski, W. R. Kropp, S. Mine, D. W. Liu, M. B. Smy, H. W. Sobel, M. R. Vagins, A. Gago, K. S. Ganezer, J. Hill, W. E. Keig, J. Y. Kim, I. T. Lim, R. W. Ellsworth, S. Tasaka, A. Kibayashi, J. G. Learned, S. Matsuno, D. Takemori, Y. Hayato, A. K. Ichikawa, T. Ishii, J. Kameda, T. Kobayashi, T. Maruyama, K. Nakamura, K. Nitta, Y. Oyama, M. Sakuda, Y. Totsuka, M. Yoshida, M. Kohama, T. Iwashita, A. T. Suzuki, T. Inagaki, I. Kato, T. Nakaya, K. Nishikawa, T. J. Haines, S. Dazeley, S. Hatakeyama, R. Svoboda, E. Blaufuss, M. L. Chen, J. A. Goodman, G. Guillian, G. W. Sullivan, D. Turcan, K. Scholberg, A. Habig, M. Ackermann, C. K. Jung, T. Kato, K. Kobayashi, K. Martens, M. Malek, C. Mauger, C. McGrew, E. Sharkey, B. Viren, C. Yanagisawa, T. Toshito, C. Mitsuda, K. Miyano, T. Shibata, Y. Kajiyama, Y. Nagashima, M. Takita, H. I. Kim, S. B. Kim, H. Okazawa, T. Ishizuka, Y. Choi, H. K. Seo, M. Etoh, Y. Gando, T. Hasegawa, K. Inoue, J. Shirai, A. Suzuki, M. Koshiba, Y. Hatakeyama, Y. Ichikawa, M. Koike, K. Nishijima, H. Ishino, M. Morii, R. Nishimura, Y. Watanabe, D. Kielczewska, H. G. Berns, S. C. Boyd, A. L. Stachyra, and R. J. Wilkes

Subjects
Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Detector, FOS: Physical sciences, Flux, Astrophysics, Solar neutrino problem, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Neutrino detector, Astrophysics::Solar and Stellar Astrophysics, Measurements of neutrino speed, High Energy Physics::Experiment, Super-Kamiokande, Neutrino oscillation
Abstract

A search for periodic modulations of the solar neutrino flux was performed using the Super-Kamiokande-I data taken from May 31st, 1996 to July 15th, 2001. The detector's capability of measuring the exact time of events, combined with a relatively high yield of solar neutrino events, allows a search for short-time variations in the observed flux. We employed the Lomb test to look for periodic modulations of the observed solar neutrino flux. The obtained periodogram is consistent with statistical fluctuation and no significant periodicity was found.

Published
2003

23. Search for Supernova Relic Neutrinos at Super-Kamiokande

Author

M. Malek, M. Morii, S. Fukuda, Y. Fukuda, M. Ishitsuka, Y. Itow, T. Kajita, J. Kameda, K. Kaneyuki, K. Kobayashi, Y. Koshio, M. Miura, S. Moriyama, M. Nakahata, S. Nakayama, T. Namba, A. Okada, T. Ooyabu, C. Saji, N. Sakurai, M. Shiozawa, Y. Suzuki, H. Takeuchi, Y. Takeuchi, Y. Totsuka, S. Yamada, S. Desai, M. Earl, E. Kearns, M. D. Messier, J. L. Stone, L. R. Sulak, C. W. Walter, M. Goldhaber, T. Barszczak, D. Casper, W. Gajewski, W. R. Kropp, S. Mine, D. W. Liu, M. B. Smy, H. W. Sobel, M. R. Vagins, A. Gago, K. S. Ganezer, W. E. Keig, R. W. Ellsworth, S. Tasaka, A. Kibayashi, J. G. Learned, S. Matsuno, D. Takemori, Y. Hayato, T. Ishii, T. Kobayashi, T. Maruyama, K. Nakamura, Y. Obayashi, Y. Oyama, M. Sakuda, M. Yoshida, M. Kohama, T. Iwashita, A. T. Suzuki, A. Ichikawa, T. Inagaki, I. Kato, T. Nakaya, K. Nishikawa, T. J. Haines, S. Dazeley, S. Hatakeyama, R. Svoboda, E. Blaufuss, J. A. Goodman, G. Guillian, G. W. Sullivan, D. Turcan, K. Scholberg, A. Habig, M. Ackermann, J. Hill, C. K. Jung, K. Martens, C. Mauger, C. McGrew, E. Sharkey, B. Viren, C. Yanagisawa, T. Toshito, C. Mitsuda, K. Miyano, T. Shibata, Y. Kajiyama, Y. Nagashima, K. Nitta, M. Takita, H. I. Kim, S. B. Kim, J. Yoo, H. Okazawa, T. Ishizuka, M. Etoh, Y. Gando, T. Hasegawa, K. Inoue, K. Ishihara, J. Shirai, A. Suzuki, M. Koshiba, Y. Hatakeyama, Y. Ichikawa, M. Koike, K. Nishijima, H. Ishino, R. Nishimura, Y. Watanabe, D. Kielczewska, H. G. Berns, S. C. Boyd, A. L. Stachyra, and R. J. Wilkes

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, General Physics and Astronomy, Flux, Cosmic ray, Astrophysics, Upper and lower bounds, High Energy Physics - Experiment, Nuclear physics, Supernova, Positron, High Energy Physics::Experiment, Neutrino, Super-Kamiokande, Charged current
Abstract

A search for the relic neutrinos from all past core-collapse supernovae was conducted using 1496 days of data from the Super-Kamiokande detector. This analysis looked for electron-type anti-neutrinos that had produced a positron with an energy greater than 18 MeV. In the absence of a signal, 90% C.L. upper limits on the total flux were set for several theoretical models; these limits ranged from 20 to 130 nu_e bar cm^-2 s^-1. Additionally, an upper bound of 1.2 nu_e bar cm^-2 s^-1 was set for the supernova relic neutrino flux in the energy region E_nu > 19.3 MeV., Comment: 4 pages, 2 figures. Submitted to Physical Review Letters. New version includes corrections to Figure 1. Also, text has been shortened to conform with the space limitations of PRL

Published
2003

24. Search for nu(e) from the sun at Super-Kamiokande-I

Author

M. Ishitsuka, T. J. Haines, A. T. Suzuki, C. W. Walter, Shantanu Desai, Y. Ichikawa, R. Nishimura, Makoto Sakuda, J. Shirai, J. L. Stone, T. Inagaki, Hyosun Kim, Ken-ichiro Kobayashi, Yoshitaka Itow, K. Martens, Shigeki Tasaka, E. Sharkey, S. Dazeley, T. Shibata, A. L. Stachyra, M. Ackermann, E. Blaufuss, J. A. Goodman, M. D. Messier, D. W. Liu, M. Koike, Y. Fukuda, C. Mitsuda, G. Guillian, C. Mauger, D. Turcan, Y. Totsuka, Y. Takeuchi, Y. Kajiyama, K. Nishikawa, K. Nitta, A. Okada, M. L. Chen, H. G. Berns, M. Miura, S. Mine, R. J. Wilkes, Yuichi Oyama, M. Earl, A. K. Ichikawa, M. Goldhaber, L. R. Sulak, T. Ishii, Takehisa Hasegawa, K. Ishihara, M. Koshiba, Y. Nagashima, H. Takeuchi, Kazumasa Miyano, Hirokazu Ishino, S. Fukuda, M. B. Smy, Y. Hatakeyama, A. Gago, H. W. Sobel, John G. Learned, S. Nakayama, H. Okazawa, K. Kaneyuki, S. C. Boyd, T. Ishizuka, D. Takemori, S. Hatakeyama, M. Etoh, Magdalena Malek, K. S. Ganezer, R. W. Ellsworth, Mikio Morii, T. Kobayashi, Michitoshi Yoshida, Tomoyuki Maruyama, Takaaki Kajita, Kunio Inoue, Alec Habig, C. Saji, S. Matsuno, A. Kibayashi, G. W. Sullivan, Yasunari Suzuki, Y. Watanabe, David William Casper, Toshio Namba, C. Yanagisawa, W. Gajewski, Kate Scholberg, Nobuyuki Sakurai, T. Toshito, M. R. Vagins, K. Nishijima, M. Takita, J. Kameda, C. McGrew, M. Kohama, Y. Hayato, K. Nakamura, S. Moriyama, T. Ooyabu, Masayuki Nakahata, Yusuke Koshio, E. Kearns, A. Suzuki, R. Svoboda, Tsuyoshi Nakaya, Y. Gando, S. B. Kim, C. K. Jung, J. Yoo, W. E. Keig, Masato Shiozawa, T. Barszczak, J. Hill, B. Viren, D. Kielczewska, I. Kato, Y. Obayashi, W. R. Kropp, S. Yamada, and T. Iwashita

Subjects
Physics, Standard solar model, Particle physics, Solar neutrino, General Physics and Astronomy, Flux, Cosmic ray, Limit (mathematics), Monochromatic color, Neutrino, Super-Kamiokande
Abstract

We present the results of a search for low energy nu(e) from the Sun using 1496 days of data from Super-Kamiokande-I. We observe no significant excess of events and set an upper limit for the conversion probability to nu(e) of the 8B solar neutrino. This conversion limit is 0.8% (90% C.L.) of the standard solar model's neutrino flux for total energy=8-20 MeV. We also set a flux limit for monochromatic nu(e) for E(nu(e))=10-17 MeV.

Published
2002

25. Solar 8B and hep neutrino measurements from 1258 days of Super-Kamiokande data

Author

S, Fukuda, Y, Fukuda, M, Ishitsuka, Y, Itow, T, Kajita, J, Kameda, K, Kaneyuki, K, Kobayashi, Y, Koshio, M, Miura, S, Moriyama, M, Nakahata, S, Nakayama, A, Okada, N, Sakurai, M, Shiozawa, Y, Suzuki, H, Takeuchi, Y, Takeuchi, T, Toshito, Y, Totsuka, S, Yamada, S, Desai, M, Earl, E, Kearns, M D, Messier, K, Scholberg, J L, Stone, L R, Sulak, C W, Walter, M, Goldhaber, T, Barszczak, D, Casper, W, Gajewski, W R, Kropp, S, Mine, D W, Liu, L R, Price, M B, Smy, H W, Sobel, M R, Vagins, K S, Ganezer, W E, Keig, R W, Ellsworth, S, Tasaka, A, Kibayashi, J G, Learned, S, Matsuno, D, Takemori, Y, Hayato, T, Ishii, T, Kobayashi, K, Nakamura, Y, Obayashi, Y, Oyama, A, Sakai, M, Sakuda, M, Kohama, A T, Suzuki, T, Inagaki, T, Nakaya, K, Nishikawa, T J, Haines, E, Blaufuss, S, Dazeley, K B, Lee, R, Svoboda, J A, Goodman, G, Guillian, G W, Sullivan, D, Turcan, A, Habig, J, Hill, C K, Jung, K, Martens, M, Malek, C, Mauger, C, McGrew, E, Sharkey, B, Viren, C, Yanagisawa, C, Mitsuda, K, Miyano, C, Saji, T, Shibata, Y, Kajiyama, Y, Nagashima, K, Nitta, M, Takita, M, Yoshida, H I, Kim, S B, Kim, J, Yoo, H, Okazawa, T, Ishizuka, M, Etoh, Y, Gando, T, Hasegawa, K, Inoue, K, Ishihara, T, Maruyama, J, Shirai, A, Suzuki, M, Koshiba, Y, Hatakeyama, Y, Ichikawa, M, Koike, K, Nishijima, H, Fujiyasu, H, Ishino, M, Morii, Y, Watanabe, U, Golebiewska, D, Kielczewska, S C, Boyd, A L, Stachyra, R J, Wilkes, and K K, Young

Abstract

Solar neutrino measurements from 1258 days of data from the Super-Kamiokande detector are presented. The measurements are based on recoil electrons in the energy range 5.0-20.0 MeV. The measured solar neutrino flux is 2.32+/-0.03(stat)+0.08-0.07(syst)x10(6) cm(-2) x s(-1), which is 45.1+/-0.5(stat)+1.6-1.4(syst)% of that predicted by the BP2000 SSM. The day vs night flux asymmetry (Phi(n)-Phi(d))/Phi(average) is 0.033+/-0.022(stat)+0.013-0.012(syst). The recoil electron energy spectrum is consistent with no spectral distortion. For the hep neutrino flux, we set a 90% C.L. upper limit of 40x10(3) cm(-2) x s(-1), which is 4.3 times the BP2000 SSM prediction.

Published
2001

26. Neutrino-induced upward stopping muons in Super-Kamiokande

Author

Y. Hatakeyama, Y. Takeuchi, Shinya Yamada, Yasunari Suzuki, Y. Totsuka, Kazumasa Miyano, M. Earl, Michael B. Smy, Kyoshi Nishijima, L. R. Sulak, H. W. Sobel, W. Doki, C. Mauger, J. Hill, W. E. Keig, T. Kobayashi, J. L. Stone, T. Inagaki, Masatoshi Koshiba, M. Takahashi, D. Takemori, E. Kearns, K. Nishikawa, M. Kohama, A. Okada, S. Hatakeyama, Yoshitaka Itow, M. Goldhaber, M. Kirisawa, Yohei Kobayashi, M. Koike, K. Higuchi, C. W. Walter, D. Casper, Makoto Sakuda, O. Sasaki, Minoru Yoshida, S. Nakayama, K. Nakamura, K. Kaneyuki, C. McGrew, Takaaki Kajita, C. Saji, K. Ishihara, S. Inaba, N. Sakurai, Ken-ichiro Kobayashi, J. A. Goodman, Alec Habig, E. Blaufuss, M. Miura, H. Fujiyasu, Y. Nagashima, K. Martens, S. Matsuno, M. Koga, Masayuki Nakahata, H. Takeuchi, Akira Hasegawa, A. Sakai, R. W. Ellsworth, A. L. Stachyra, Soo-Bong Kim, L. R. Price, J. Shirai, B. K. Kim, W. Gajewski, Kate Scholberg, T. Ishii, M. D. Messier, S. Echigo, A. Kibayashi, J. Kameda, Shigeki Tasaka, E. Sharkey, S. Kasuga, Y. Fukuda, V. J. Stenger, K. S. Ganezer, M. Takita, M. L. Chen, R. J. Wilkes, Ko Okumura, Hiroshi Ogawa, Takehisa Hasegawa, Yuichi Oyama, Takashi Yamaguchi, Hirokazu Ishino, K. K. Young, Kunio Inoue, Tomoyuki Maruyama, John G. Learned, M. Nemoto, T. Futagami, J. S. George, F. Tsushima, C. Yanagisawa, A. T. Suzuki, G. W. Sullivan, H. Okazawa, Y. Kanaya, M. Etoh, Y. Watanabe, R. Sanford, S. Mine, C. K. Jung, M. Takahata, A. Suzuki, D. Kielczewska, R. Svoboda, Y. Obayashi, Y. Hayato, T. J. Haines, W. R. Kropp, T. Iwamoto, Masato Shiozawa, Yusuke Koshio, T. Barszczak, Mark R. Vagins, and B. Viren

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Flux, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Expected value, High Energy Physics - Experiment, Nuclear physics, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Super-Kamiokande, Zenith
Abstract

A total of 137 upward stopping muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 516 detector live days. The measured muon flux is 0.39+/-0.04(stat.)+/-0.02(syst.)x10^{-13}cm^{-2}s^{-1}sr^{-1} compared to an expected flux of 0.73+/-0.16(theo.)x10^{-13}cm^{-2}s^{-1}sr^{-1}. Using our previously-published measurement of the upward through-going muon flux, we calculate the stopping/through-going flux ratio R}, which has less theoretical uncertainty. The measured value of R=0.22+/-0.02(stat.)+/-0.01(syst.) is significantly smaller than the value 0.37^{+0.05}_{-0.04}(theo.) expected using the best theoretical information (the probability that the measured R is a statistical fluctuation below the expected value is 0.39%). A simultaneous fitting to zenith angle distributions of upward stopping and through-going muons gives a result which is consistent with the hypothesis of neutrino oscillations with the parameters sin^2 2\theta >0.7 and 1.5x10^{-3} < \Delta m^2 < 1.5x10^{-2} eV^2 at 90% confidence level, providing a confirmation of the observation of neutrino oscillations by Super-Kamiokande using the contained atmospheric neutrino events., Comment: 15 pages, including 7 figures. Submitted to Physics Letters Revision fixes typo in author field

Published
1999

27. Observation of the east-west anisotropy of the atmospheric neutrino flux

Author

Masatoshi Koshiba, A. Kibayashi, Y. Totsuka, R. W. Ellsworth, G. W. Sullivan, M. Nemoto, C. W. Walter, Y. Hatakeyama, Akira Hasegawa, John G. Learned, T. Futagami, D. Takemori, T. Hayakawa, Yoshitaka Itow, Shoei Nakayama, M. Earl, R. J. Wilkes, L. Wai, Takaaki Kajita, H. Ishino, M. Kirisawa, K. K. Young, C. K. Jung, M. Takahata, D. Kielczewska, M. Goldhaber, Tomoyuki Maruyama, Katsuhiro Kobayashi, Soo-Bong Kim, M. Koike, D. Casper, S. Kasuga, Y. Fukuda, J. Hill, L. R. Price, J. Shirai, Makoto Sakuda, K. Higuchi, Minoru Yoshida, Y. Hayato, Michael B. Smy, M. Takita, Shigeki Tasaka, E. Sharkey, Y. Takeuchi, Kazumasa Miyano, K. Martens, C. McGrew, Shinya Yamada, T. Ishii, M. D. Messier, S. Echigo, C. Yanagisawa, Todd Haines, J. Kameda, M. Miura, T. Iwamoto, Hiroshi Ogawa, C. Mauger, V. J. Stenger, T. Kobayashi, M. L. Chen, W. Doki, Takashi Yamaguchi, Atsumu Suzuki, A. Okada, Kyoshi Nishijima, Takehisa Hasegawa, A. L. Stachyra, Junichi Kanzaki, A. Sakai, Nobuyuki Sakurai, K. Nakamura, Yusuke Koshio, W. E. Keig, Y. Nagashima, H. Takeuchi, Y. Obayashi, S. Matsuno, Yasunari Suzuki, Mark R. Vagins, W. Gajewski, Kate Scholberg, Masayuki Nakahata, B. K. Kim, K. Ishihara, E. Kearns, M. Takahashi, W. R. Kropp, Masato Shiozawa, J. L. Stone, L. R. Sulak, T. Barszczak, M. Etoh, Alec Habig, K. S. Ganezer, M. Koga, S. Hatakeyama, K. Kaneyuki, C. Saji, A. Suzuki, R. Svoboda, Y. Kobayashi, S. Inaba, S. Mine, J. S. George, B. Viren, M. Kohama, K. Nishikawa, Yuichi Oyama, E. Blaufuss, F. Tsushima, Ko Okumura, Kunio Inoue, Y. Kanaya, H. Okazawa, Y. Watanabe, R. Sanford, H. W. Sobel, Osamu Sasaki, H. Fujiyasu, and J. A. Goodman

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, Cosmic ray, Astrophysics, Magnetic field, High Energy Physics - Experiment, Atmosphere of Earth, Earth's magnetic field, Neutrino detector, High Energy Physics::Experiment, Neutrino, Anisotropy, Charged current, Physics::Atmospheric and Oceanic Physics
Abstract

The east-west anisotropy, caused by the deflection of primary cosmic rays in the Earth's magnetic field, is observed for the first time in the flux of atmospheric neutrinos. Using a 45 kt-year exposure of the Super-Kamiokande detector, 552 e-like and 633 mu-like horizontally-going events are selected in the momentum range between 400 and 3000 MeV/c. The azimuthal distribution of e-like and mu-like events agrees with the expectation from atmospheric neutrino flux calculations that account for the geomagnetic field, verifying that the geomagnetic field effects in the production of atmospheric neutrinos in the GeV energy range are well understood., Comment: 8 pages,3 figures revtex, submitted to PRL

Published
1999

28. Search for Nucleon Decay via Modes Favored by Supersymmetric Grand Unification Models in Super-Kamiokande-I

Author

Masatoshi Koshiba, Shoei Nakayama, Yuichi Oyama, A. Kibayashi, J. Ishii, K. Kaneyuki, J. Hill, Y. Gando, S. Matsuno, Yasunari Suzuki, Makoto Sakuda, Y. Takeuchi, Shinya Yamada, Toshio Namba, Y. Totsuka, Yusuke Koshio, R. Nambu, Mark R. Vagins, T. Ishizuka, H. Maesaka, M. Goldhaber, Taichi Morita, R. W. Ellsworth, A. Suzuki, M. Earl, Masashi Yokoyama, J. A. Goodman, R. Svoboda, Magdalena Malek, J. Zalipska, T. Harada, Tsuyoshi Nakaya, T. Ishida, C. McGrew, M. Ishitsuka, C. W. Walter, Y. Hayato, S. B. Kim, J. Y. Kim, J. Yoo, Shantanu Desai, Masato Shiozawa, Y. Choi, N. Tamura, T. Sasaki, J. L. Stone, L. R. Sulak, Henry W. Sobel, K. Nitta, Shoji Yamamoto, Koji Nakamura, A. Minamino, Kyoshi Nishijima, Michael B. Smy, T. Ooyabu, Masayuki Nakahata, Takaaki Kajita, H. Seo, Shigetaka Moriyama, Y. Fukuda, A. L. Stachyra, T. J. Haines, A. Sarrat, David William Casper, C. Mitsuda, J. Hosaka, A. K. Ichikawa, M. D. Messier, K. K. Shiraishi, D. W. Liu, C. Mauger, D. Takemori, K. Taki, A. Okada, H. G. Berns, J. Kameda, C. W. Sterner, D. Turcan, Y. Nakajima, K. Ishihara, T. Kobayashi, K. Hayashi, S. Ueda, T. Maruyama, Ko Okumura, John G. Learned, Y. Ashie, G. W. Sullivan, Katsuhiro Kobayashi, Kunio Inoue, J. S. Jang, K. Nishikawa, Y. Watanabe, S. Mine, T. Toshito, J. P. Cravens, W. R. Kropp, G. Guillian, T. Iwashita, S. Likhoded, Yoshitaka Itow, Y. Kuno, T. Kato, C. K. Jung, Minoru Yoshida, D. Kielczewska, Kazumasa Miyano, K. S. Ganezer, I. Kato, Y. Obayashi, W. E. Keig, Y. Takenaga, Masaya Hasegawa, M. Miura, K. Washburn, S. Hatakeyama, R. Gran, E. Blaufuss, C. Yanagisawa, Atsumu Suzuki, E. Kearns, T. Nakadaira, Takehisa Hasegawa, C. Saji, Hirokazu Ishino, W. Wang, H. Okazawa, Alec Habig, J. Shirai, Shigeki Tasaka, E. Sharkey, S. Dazeley, W. Gajewski, Kate Scholberg, T. Ishii, R. J. Wilkes, and I. T. Lim

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Supersymmetry, High Energy Physics - Experiment, Particle decay, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Mass spectrum, Grand Unified Theory, High Energy Physics::Experiment, Neutron, Neutrino, Nucleon, Super-Kamiokande
Abstract

We report the results for nucleon decay searches via modes favored by supersymmetric grand unified models in Super-Kamiokande. Using 1489 days of full Super-Kamiokande-I data, we searched for $p \to \bar{\nu} K^+$, $n \to \bar{\nu} K^0$, $p \to \mu^+ K^0$ and $p \to e^+ K^0$ modes. We found no evidence for nucleon decay in any of these modes. We set lower limits of partial nucleon lifetime 2.3$\times10^{33}$, 1.3$\times10^{32}$, 1.3$\times10^{33}$ and 1.0$\times10^{33}$ years at 90% confidence level for $p \to \bar{\nu} K^+$, $n \to \bar{\nu} K^0$, $p \to \mu^+ K^0$ and $p \to e^+ K^0$ modes, respectively. These results give a strong constraint on supersymmetric grand unification models., Comment: 14 pages, 13 figures

Published
2005

29. Erratum: Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days [Phys. Rev. Lett. 81, 1158 (1998)]

Author

K. Nishikawa, Y. Totsuka, C. W. Walter, Frederick Reines, M. Takahata, M. Earl, D. Kielczewska, S. Kasuga, Y. Fukuda, K. Ishihara, A. T. Suzuki, M. Takita, Atsumu Suzuki, H. W. Sobel, Y. Takeuchi, W. R. Kropp, M. R. Vagins, Z. Conner, T. Kajita, E. Blaufuss, Makoto Sakuda, K. Nakamura, K. S. Ganezer, Takashi Yamaguchi, Osamu Sasaki, S. Yamada, K. Fujita, K. Kaneyuki, J. S. George, M. Koshiba, T. Kobayashi, C. Saji, T. Hayakawa, Ko Okumura, C. Yanagisawa, M. Nemoto, T. Futagami, Michitoshi Yoshida, Kunio Inoue, M. Miura, Yasunari Suzuki, Y. Nagashima, E. Ichihara, J. G. Learned, S. Nakayama, M. Ota, H. Ogawa, A. Sakai, Nobuyuki Sakurai, S. B. Kim, G. W. Sullivan, M. Etoh, A. L. Stachyra, S. Echigo, R. W. Ellsworth, J. Hsu, M. Masuzawa, M. D. Messier, V. J. Stenger, P. G. Halverson, J. L. Stone, Ken-ichiro Kobayashi, M. L. Chen, M. Goldhaber, J. Kameda, S. Hatakeyama, A. Kusano, W. Gajewski, Kate Scholberg, T. Iwamoto, J. T. Hong, H. Koga, A. Kibayashi, K. K. Young, Yusuke Koshio, T. Kinebuchi, R. A. Doyle, L. R. Sulak, Hirokazu Ishino, Y. Kanaya, T. Ishii, Y. Watanabe, Yuichi Oyama, Masaki Mori, M. Kohama, D. Takemori, J. Wilkes, R. Sanford, K. Nishijima, L. Wai, C. McGrew, M. Oketa, Tomoyuki Maruyama, C. Mauger, A. Okada, K. Martens, J. W. Flanagan, F. Tsushima, Takehisa Hasegawa, Y. Hayato, Y. Kitaguchi, Masayuki Nakahata, J. A. Goodman, Yoshitaka Itow, B. Viren, Kazumasa Miyano, John Hill, W. Doki, T. J. Haines, W. E. Keig, Y. Kobayashi, Junichi Kanzaki, C. K. Jung, Masato Shiozawa, T. Barszczak, E. Kearns, R. Svoboda, T. Ishizuka, H. Okazawa, Alec Habig, S. Matsuno, M. Koga, Akira Hasegawa, L. R. Price, Shigeki Tasaka, and E. Sharkey

Subjects
Physics, Nuclear physics, Solar neutrino, General Physics and Astronomy, Flux, Super-Kamiokande
Published
1998

Catalog

Books, media, physical & digital resources
See catalog results