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1. Basic Performance of PHENEX: A Polarimeter for High ENErgy X rays

Author: Hiroshi Tsunemi, Kiyoshi Hayashida, Y. Ishigaki, Tatehiro Mihara, Fuyuki Tokanai, M. Morimoto, C. Ito, Shuichi Gunji, Kento Suzuki, Asami Hayato, Yoshitaka Saito, S. Kishimoto, Naohisa Anabuki, Makoto Kanno, H. Sakurai, H. Murayama, M. Kohama, Masayo Suzuki, Takamasa Yamagami, and Yuji Kishimoto
Subjects: Physics, Nuclear and High Energy Physics, X-ray astronomy, business.industry, Detector, Polarimetry, Polarimeter, Astrophysics, Polarization (waves), Modulation factor, Optics, Crab Nebula, Nuclear Energy and Engineering, High-energy X-rays, Electrical and Electronic Engineering, business
Abstract: 著者人数: 20名, 資料番号: SA1000093000
Published: 2007
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2. Measurement of neutrino oscillation by the K2K experiment

Author: S. Andringa, T. Nakadaira, R. Gran, Tadayuki Takahashi, Yoshitaka Itow, Makoto Sakuda, F. Nakata, K. Fujii, A. Rodriguez, D. Kerr, M. H. Ahn, U. Dore, S. Likhoded, S P Mikheyev, K. Martens, Y. Totsuka, Y. Takubo, Kate Scholberg, Y. Takeuchi, Yu. Kudenko, Shinya Yamada, H. I. Jang, S. C. Boyd, M. Okumura, A. Blondel, A. Ikeda, K. Tashiro, Itsuo Nakano, C. K. Jung, M. Sekiguchi, H. Yokoyama, F. Pierre, Minoru Yoshida, M. Kitamura, L. Whitehead, K. Taki, S. Nawang, N. Yershov, Shogo Nishiyama, O. V. Mineev, E. Sharkey, K. Kaneyuki, Hirokazu Ishino, D. Kielczewska, Shoei Nakayama, Taichi Morita, Y. Kurimoto, Hiroyuki Noumi, T. Otaki, R. Schroeter, L. Ludovici, E. J. Jeon, Takashi Kobayashi, J. Kameda, M. Onchi, Y. Yamanoi, C. Cavata, M. Sorel, Katsuki Hiraide, H. C. Bhang, P. F. Loverre, J. Bouchez, M. Y. Pac, G. Sitjes, S. Mine, C. O. Kim, I. Kato, E. Seo, A. Shima, T. Kutter, K. Hayashi, H. So, S. M. Oser, T. Ishida, J. Hill, J. Catala, A. K. Ichikawa, Tomoyuki Maruyama, T. Hara, K. K. Joo, Lawrence Sulak, P. Novella, Susumu Noda, S. Fukuda, K. Takenaka, Yoshitaka Kuno, T. Ishii, Masaaki Tanaka, F. Nova, John G. Learned, Y. Yamada, B. H. Kang, Y. Obayashi, M. Takasaki, A. Minamino, A. Tornero-Lopez, J.J. Gómez-Cadenas, Takanori Sasaki, M. Fechner, S. Echigo, C. Yanagisawa, J. Zalipska, C. McGrew, G. Jover, J.H. Kim, K. Nakamura, K. B. McConnel Mahn, S. B. Kim, V. A. Matveev, M. Minakawa, A. Cervera, C. W. Walter, Y. Takenaga, Y. Hayato, Yuichi Oyama, Masaya Hasegawa, M. Miura, G. Kume, M. Tada, David William Casper, Takehisa Hasegawa, C. Mitsuda, K. Sato, J. Hosaka, A. Suzuki, R. L. Helmer, Hyosun Kim, Katsuhiro Kobayashi, A. Sakai, Nobuyuki Sakurai, Yusuke Koshio, S. Ueda, Shoji Yamamoto, J. Mallet, S. Matsuno, H. Takeuchi, T. Ooyabu, Masayuki Nakahata, Y. Aoyama, R. Terri, R. Ashie, H. Ishii, Y. Suga, Masashi Yokoyama, J. S. Jang, G. Mitsuka, E. Aliu, H. Tanaka, A. Sarrat, Mark R. Vagins, K. K. Shiraishi, Takaaki Kajita, Masaki Ishitsuka, Kenichi Tanaka, Yoshihiro Suzuki, H. Park, Masaharu Ieiri, X. Espinal, Y. Moriguchi, Beom Jun Kim, Michael B. Smy, Y. Fukuda, T. Iwashita, R. J. Wilkes, I. Higuchi, I. T. Lim, Y. Kato, W. R. Kropp, Federico Sanchez, Toshio Namba, C. Mariani, H. Maesaka, Ko Okumura, E. Kearns, Shigeki Aoki, T. Toshito, Hiroshi Sato, K. Asakura, P. Kitching, C. Mauger, J. Argyriades, H. Nishino, S. H. Lim, A. Okada, M. Kohama, M. Takatsuki, F. Berghaus, Tsuyoshi Nakaya, C. Saji, J. Kubota, Jordi Burguet-Castell, H. G. Berns, W. Wang, Masataka Iinuma, E. Hirose, J. Yoo, K. Nishikawa, J. Y. Kim, Henry W. Sobel, K. Nitta, Y. Tanaka, Masato Shiozawa, Shaomin Chen, A. Konaka, Shigetaka Moriyama, K. O. Cho, R. Nambu, N. Tamura, Silvia Borghi, J. L. Stone, T. Inagaki, A. N. Khotjantsev, Y. Fujii, J. H. Choi, M. M. Khabibullin, Stephane T'Jampens, E. Fernandez, I. S. Jeong, and K. Ishihara
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Tamura, Norio, 010308 nuclear & particles physics, Oscillation, T2K experiment, FOS: Physical sciences, Física, Elementary particle, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Massless particle, High Energy Physics - Experiment (hep-ex), K2K experiment, 0103 physical sciences, 田村, 詔生, Neutrino, 010306 general physics, Neutrino oscillation, Lepton
Abstract: We present measurements of nu_mu disappearance in K2K, the KEK to Kamioka long-baseline neutrino oscillation experiment. One hundred and twelve beam-originated neutrino events are observed in the fiducial volume of Super-Kamiokande with an expectation of 158.1^{+9.2}_{-8.6} events without oscillation. A distortion of the energy spectrum is also seen in 58 single-ring muon-like events with reconstructed energies. The probability that the observations are explained by the expectation for no neutrino oscillation is 0.0015% (4.3sigma). In a two flavor oscillation scenario, the allowed Delta m^2 region at sin^2(2theta) is between 1.9 and 3.5 x 10^{-3} eV^2 at the 90% C.L. with a best-fit value of 2.8 x 10^{-3} eV^2., Comment: 40 pages, 48 figures
Published: 2006

3. GPS survey in long baseline neutrino-oscillation measurement

Author: Kenzo Nakamura, K. Nishikawa, T. Inagaki, E. Kusano, Michifumi Minakawa, M. Kohama, Yutaka Yamanoi, M. Kurodai, Makoto Sakuda, Masaharu Ieiri, Kazuhiro Tanaka, Hiroyuki Noumi, Minoru Takasaki, Yoshihiro Suzuki, Takehisa Hasegawa, Y. Katoh, and Tomoyuki Maruyama
Subjects: Physics, Nuclear and High Energy Physics, Beam diameter, Muon, Physics::Instrumentation and Detectors, law.invention, Nuclear physics, Magnetic horn, Nuclear Energy and Engineering, Neutrino detector, law, Physics::Accelerator Physics, Focal length, High Energy Physics::Experiment, Electrical and Electronic Engineering, Neutrino, Neutrino oscillation, Beam (structure)
Abstract: We made a series of surveys to obtain neutrino beam line direction toward SuperKamiokande (SK) at a distance of 250 km for the long-baseline neutrino oscillation experiment at KEK. We found that the beam line is directed to SK within 0.03 mr and 0.09 mr (in sigma) in the horizontal and vertical directions, respectively. During beam operation, we monitored the muon distribution from secondary pions produced at the target and collected by a magnetic horn system. We found that the horn system functions like a lens of a point-to-parallel optics with magnification of approximately -100 and the focal length of 2.3 m. Namely, a small displacement of the primary beam position at the target is magnified about a factor -100 at the muon centroid, while the centroid position is almost stable against a change of the incident angle of the primary beam. Therefore, the muon centroid can be a useful monitor of the neutrino beam direction. We could determine the muon centroid within 6 mm and 12 mm in horizontal and vertical directions, respectively. This means that the neutrino beam direction could be controlled within 0.03 mr and 0.06 mr (in sigma) in the horizontal and vertical directions, respectively. We confirmed the beam direction with the neutrino distribution reconstructed at the near detector in KEK.
Published: 2004
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4. 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
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5. 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

6. 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
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7. Brief Parenteral Nutrition Accelerates Weight Gain, Head Growth Even in Healthy VLBWs

Author: Naho, Morisaki, Mandy B, Belfort, Marie C, McCormick, Rintaro, Mori, Hisashi, Noma, Satoshi, Kusuda, Masanori, Fujimura, and M, Kohama
Subjects: Adult, Male, Pediatrics, medicine.medical_specialty, Parenteral Nutrition, Time Factors, Epidemiology, Science, Birth weight, Weight Gain, Enteral administration, Child Development, Intensive Care Units, Neonatal, medicine, Humans, Infant, Very Low Birth Weight, Clinical Epidemiology, Neonatology, Growth Retardation, Pediatric Epidemiology, Biology, Nutrition, Multidisciplinary, business.industry, Malnutrition, Postmenstrual Age, Infant, Newborn, Infant, Correction, Obstetrics and Gynecology, Length of Stay, Low birth weight, Parenteral nutrition, Health, Gestation, Medicine, Female, medicine.symptom, business, Weight gain, Head, Organism Development, Research Article, Developmental Biology
Abstract: IntroductionWhether parenteral nutrition benefits growth of very low birth weight (VLBW) preterm infants in the setting of rapid enteral feeding advancement is unclear. Our aim was to examine this issue using data from Japan, where enteral feeding typically advances at a rapid rate.MethodsWe studied 4005 hospitalized VLBW, very preterm (23-32 weeks' gestation) infants who reached full enteral feeding (100 ml/kg/day) by day 14, from 75 institutions in the Neonatal Research Network Japan (2003-2007). Main outcomes were weight gain, head growth, and extra-uterine growth restriction (EUGR, measurement Results40% of infants received parenteral nutrition. Adjusting for maternal, infant, and institutional characteristics, infants who received parenteral nutrition had greater weight gain [0.09 standard deviation (SD), 95% CI: 0.02, 0.16] and head growth (0.16 SD, 95% CI: 0.05, 0.28); lower odds of EUGR by head circumference (OR 0.66, 95% CI: 0.49, 0.88). No statistically significant difference was seen in the proportion of infants with EUGR at discharge. SGA infants and infants who took more than a week until full feeding had larger estimates.DiscussionEven in infants who are able to establish enteral nutrition within 2 weeks, deprivation of parenteral nutrition in the first weeks of life could lead to under nutrition, but infants who reached full feeding within one week benefit least. It is important to predict which infants are likely or not likely to advance on enteral feedings within a week and balance enteral and parenteral nutrition for these infants.
Published: 2014

8. Detection of accelerator-produced neutrinos at a distance of 250 km

Author: S.H Ahn, S An, S Aoki, H.G Berns, H.C Bhang, S Boyd, D Casper, T Chikamatsu, J.H Choi, S Echigo, M Etoh, K Fujii, S Fukuda, Y Fukuda, W Gajewski, U Golebiewska, T Hara, T Hasegawa, Y Hayato, J Hill, S.J Hong, M Ieiri, T Inada, T Inagaki, T Ishida, H Ishii, T Ishii, H Ishino, M Ishitsuka, Y Itow, T Iwashita, H.I Jang, J.S Jang, E.J Jeon, E.M Jeong, C.K Jung, T Kadowaki, T Kajita, J Kameda, K Kaneyuki, I Kato, Y Kato, E Kearns, S Kenmochi, B.H Khang, A Kibayashi, D Kielczewska, B.J Kim, C.O Kim, H.I Kim, J.H Kim, J.Y Kim, S.B Kim, S Kishi, M Kitamura, K Kobayashi, T Kobayashi, Y Kobayashi, M Kohama, D.G Koo, Y Koshio, W Kropp, G Kume, E Kusano, J.G Learned, H.K Lee, J.W Lee, S.B Lee, I.T Lim, S.H Lim, H Maesaka, K Martens, T Maruyama, S Matsuno, C Mauger, C McGrew, M Minakawa, S Mine, M Miura, S Miyamoto, K Miyano, S Moriyama, S Mukai, M Nakahata, K Nakamura, M Nakamura, I Nakano, T Nakaya, S Nakayama, K Nakayoshi, K Nishijima, K Nishikawa, S Nishiyama, S Noda, H Noumi, Y Obayashi, J.K Oh, A Okada, M Onchi, T Otaki, Y Oyama, M.Y Pac, H Park, S.H Park, S.K Park, A Sakai, M Sakuda, N Sakurai, N Sasao, K Sato, K Scholberg, E Seo, E Sharkey, K Shiino, A Shima, M Shiozawa, H So, H Sobel, A Stachyra, J.L Stone, L.R Sulak, A Suzuki, Y Suzuki, M Takasaki, M Takatsuki, K Takenaka, H Takeuchi, Y Takeuchi, N Tamura, K.H Tanaka, Y Tanaka, K Tashiro, K Tauchi, T Toshito, Y Totsuka, V Tumakov, T Umeda, M Vagins, C.W Walter, R.J Wilkes, S Yamada, T Yamaguchi, Y Yamanoi, C Yanagisawa, H Yokoyama, J Yoo, M Yoshida, and S.Y You
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Detector, Extrapolation, FOS: Physical sciences, Coincidence, High Energy Physics - Experiment, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Pion, K2K experiment, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Neutrino, Neutrino oscillation, Nuclear Experiment, Beam (structure)
Abstract: The KEK to Kamioka long-baseline neutrino experiment (K2K) has begun its investigation of neutrino oscillations suggested by atmospheric neutrino observations. Twenty-eight neutrino events have been detected in coincidence with the expected arrival time of the beam in the 22.5 kt fiducial volume of Super--Kamiokande, the far detector at 250 km distance. The expectation is 37.8+3.5-3.8, derived using measurements of neutrino interactions in a near detector and extrapolation using a beam simulation validated by a measurement of pion kinematics after production and focusing. The background is of order 10^-3 events., Comment: 6 pages, 3 embedded figures, LaTeX with RevTeX style, submitted to PRL. This version is As Submitted
Published: 2001
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9. 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
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10. 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
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11. 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
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12. Large horn magnets at the KEK neutrino beam line. II

Author: K. Nishikawa, T. Inagaki, Tomoyuki Maruyama, H. Nuomi, Minoru Takasaki, Y. Kato, Yutaka Yamanoi, Masaharu Ieiri, Kazuhiro Tanaka, Yoshihiro Suzuki, E. Kusano, Michifumi Minakawa, and M. Kohama
Subjects: Physics, Proton Synchrotron, Superconducting magnet, Condensed Matter Physics, Synchrotron, Electronic, Optical and Magnetic Materials, law.invention, Magnetic field, Nuclear physics, law, Horn (acoustic), Magnet, Electrical and Electronic Engineering, Neutrino, Neutrino oscillation
Abstract: For pt.I see Yamanoi et al., Proc. on Magnet Technology, p.711 (1997) We report on the status of the latest operation of the horn magnets. Our two types of large horn magnets were installed in the neutrino beam line at the KEK-12 GeV Proton Synchrotron (KEK-PS) and have been operated since March 1999. These two focusing magnets were designed to be excited at pulsed-high currents of up to 250 kA. One of the special characters of our horn magnet is a built-in pion-production target at the most upstream part of the inner conductor. This configuration enable us to increase the neutrino flux as high as possible with low-energy primary protons from the KEK-PS. Our horns have a coaxial-shape structure with a large diameter, i.e. a large volume of the magnetic field, in order to collect as many pions as possible. We estimate that the neutrino flux is enhanced by a factor of 14 by using this horn system. Both horns have been excited over 10/sup 6/ times at pulsed currents of 175 kA-250 kA. Some beginning problems were found in the peripheral apparatus of the horn magnets, and the built-in production target was found have a fatal mechanical damage. In the spring run, the performance of our horn magnet system was almost sufficient as a pion focusing device for a long-baseline neutrino oscillation experiment.
Published: 2000
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13. Estimation of the site-energy difference in the crystal of tetraethylammonium(dimethyltetracyano-p-quinodimethanide)2 (Et4N(DMTCNQ)2)

Author: Kazumasa Ueda, Toyonari Sugimoto, C. Nakano, M. Kohama, and K. Yakushi
Subjects: Tetraethylammonium, Stereochemistry, Frequency shift, General Chemistry, Crystal structure, Spectral shift, Condensed Matter Physics, Ion, Crystal, chemistry.chemical_compound, Crystallography, symbols.namesake, chemistry, Reflection spectrum, Materials Chemistry, symbols, Raman spectroscopy
Abstract: We determined the fractional charge of DMTCNQ in the crystal of anion radical salts Et 4 N(DMTCNQ) 2 as Et 4 N + (A −0.6 B −0.4 ) combining the frequency shift of the Raman active CC stretching mode with the calculation of Madelung energy, where A and B represent DMTCNQ in the crystallographically independent sites. We estimated the site-energy difference between A and B from the analysis of the reflection spectrum of the charge-transfer band. The site-energy difference estimated from the calculation of the Madelung energy was comparable with this experimentally estimated value 0.082 eV.
Published: 2000
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14. MRI of arachnoid granulations within the dural sinuses using a FLAIR pulse sequence

Author: Ichiro Ikushima, M Kohama, Masayuki Yamura, H Kawano, K Arikawa, Mutsumasa Takahashi, O Makita, and Yukunori Korogi
Subjects: Adult, Male, congenital, hereditary, and neonatal diseases and abnormalities, Adolescent, Arachnoid granulation, Fluid-attenuated inversion recovery, Subarachnoid Space, Lesion, Cerebrospinal fluid, Dural sinus, Humans, Medicine, Radiology, Nuclear Medicine and imaging, Child, Sinus (anatomy), Aged, Retrospective Studies, Aged, 80 and over, business.industry, General Medicine, Anatomy, Middle Aged, medicine.disease, Cerebral Veins, Thrombosis, nervous system diseases, body regions, Skull, medicine.anatomical_structure, Child, Preschool, Pulsatile Flow, Granulation Tissue, Female, Dura Mater, Arachnoid, medicine.symptom, business, Nuclear medicine, Magnetic Resonance Angiography
Abstract: The purpose of the study was to assess the signal intensities of arachnoid granulations within the dural sinuses using the FLAIR sequence for differentiation of space-occupying lesions in and adjacent to the dural sinuses. We retrospectively reviewed MR images of the brain of 1118 consecutive subjects, ranging in age from 0 to 93 years (mean 57.2 years). Nodules within the dural sinuses with signal intensities similar to that of cerebrospinal fluid (CSF) on both T1 and T2 weighted images were defined as arachnoid granulations. The location, signal intensity on T1 weighted spin echo (SE), T2 weighted fast SE and FLAIR images, the impression on the inner table of the skull, and the size of the lesion were assessed. 112 subjects (10.0%), age range 4-89 years old (mean 58.9 years), were found to have 134 arachnoid granulations. The commonest location was the transverse sinus, with 115 granulations (85.8%). The prevalence of the granulations showed a peak in the sixth decade of age. All granulations were isointense relative to CSF on T2 weighted images and almost all lesions were isointense relative to CSF on T1 weighted images. On FLAIR images, 90.3% of the granulations were isointense relative to CSF and the other 9.7% granulations were slightly hyperintense compared with the CSF. 21 (15.7%) subjects showed impressions on the inner table; one case involved the outer table. In conclusion, arachnoid granulations were isointense or slightly hyperintense relative to CSF on FLAIR. FLAIR images are helpful in differentiating arachnoid granulations from other dural sinus lesions or skull lesions which have an intensity similar to that of CSF on T1 weighted and T2 weighted images. Arachnoid granulation is a normal variation in cerebral venous anatomy which is frequently observed in thin slice, contrast enhanced CT and MRI, conventional angiography and MR angiography (MRA) (1-4). However, it is some- times difficult to differentiate arachnoid granula- tion from dural sinus thrombosis, dermoid, epidermoid, cavernous haemangioma, menin- gioma and other lesions (5, 6). Arachnoid granulations are hypointense on T1 weighted images, variable in signal on proton density weighted images and hyperintense on T2 weighted images (3, 4). To our knowledge, the appearance of arachnoid granulations on FLAIR images has not been previously described; such information may be helpful in preventing the erroneous diagnosis of venous sinus disease. The purpose of the present study was to assess the signal intensity of arachnoid granulations in variable sequences, including FLAIR, on routine MR images. We also assessed the size and frequency of the granulations.
Published: 1999
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15. 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
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16. 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
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17. 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

18. 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

19. 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
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20. 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
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21. Physisorption lifetimes of Cl2 on the Si(100) surfaces adsorbed with Cs and Cl

Author: Akira Namiki, H. Doshita, M Kamada, K. Ohtani, S Tanaka, M Kohama, K Asao, and Y Takamine
Subjects: Silicon, Chemistry, Scattering, Analytical chemistry, chemistry.chemical_element, Surfaces and Interfaces, Condensed Matter Physics, Alkali metal, Spectral line, Surfaces, Coatings and Films, Adsorption, Physisorption, X-ray photoelectron spectroscopy, Caesium, Materials Chemistry
Abstract: Physisorption lifetimes of Cl 2 as well as Cs(4d) and Cl(2p) XPS spectra have been measured on the Cl/Cs/Si(100) surfaces. As the Cs coverage is increased and the surface temperature is lowered, trapping-desorption scattering emerges to show the fast and slow detrapping modes. The activation energies and the pre-exponential factors for detrapping become large with increasing Cs coverage. The appearance of two peaks in the observed Cs(4d) XPS spectra suggests two types of Cs adatoms. Local surface dipoles due to the Cs adatoms may be responsible for the difference in the depth of the physisorption wells.
Published: 1998
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22. 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
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23. Measurement of a small atmospheric ν/ν ratio

Author: Y. Fukuda, T. Hayakawa, E. Ichihara, K. Inoue, K. Ishihara, H. Ishino, Y. Itow, T. Kajita, J. Kameda, S. Kasuga, K. Kobayashi, Y. Kobayashi, Y. Koshio, K. Martens, M. Miura, M. Nakahata, S. Nakayama, A. Okada, M. Oketa, K. Okumura, M. Ota, N. Sakurai, M. Shiozawa, Y. Suzuki, Y. Takeuchi, Y. Totsuka, S. Yamada, M. Earl, A. Habig, J.T. Hong, E. Kearns, S.B. Kim, M. Masuzawa, M.D. Messier, K. 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, F. Reines, H.W. Sobel, M.R. Vagins, K.S. Ganezer, W.E. Keig, R.W. Ellsworth, S. Tasaka, J.W. Flanagan, A. Kibayashi, J.G. Learned, S. Matsuno, V. Stenger, D. Takemori, T. Ishii, J. Kanzaki, T. Kobayashi, K. Nakamura, K. Nishikawa, Y. Oyama, A. Sakai, M. Sakuda, O. Sasaki, S. Echigo, M. Kohama, A.T. Suzuki, T.J. Haines, E. Blaufuss, R. Sanford, R. Svoboda, M.L. Chen, Z. Conner, J.A. Goodman, G.W. Sullivan, M. Mori, F. Goebel, J. Hill, C.K. Jung, C. Mauger, C. McGrew, E. Sharkey, B. Viren, C. Yanagisawa, W. Doki, T. Ishizuka, Y. Kitaguchi, H. Koga, K. Miyano, H. Okazawa, C. Saji, M. Takahata, A. Kusano, Y. Nagashima, M. Takita, T. Yamaguchi, M. Yoshida, M. Etoh, K. Fujita, A. Hasegawa, T. Hasegawa, S. Hatakeyama, T. Iwamoto, T. Kinebuchi, M. Koga, T. Maruyama, H. Ogawa, M. Saito, A. Suzuki, F. Tsushima, M. Koshiba, M. Nemoto, K. Nishijima, T. Futagami, Y. Hayato, Y. Kanaya, K. Kaneyuki, Y. Watanabe, D. Kielczewska, R. Doyle, J. George, A. Stachyra, L. Wai, J. Wilkes, and K. Young
Subjects: Momentum, Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Monte Carlo method, Detector, Theoretical models, High Energy Physics::Experiment, Production (computer science), Atmospheric neutrino, Nuclear Experiment, Visible energy
Abstract: From an exposure of 25.5~kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum $p_e > 100$ MeV/$c$, $p_\mu > 200$ MeV/$c$, and with visible energy less than 1.33 GeV. Using a detailed Monte Carlo simulation, the ratio $(\mu/e)_{DATA}/(\mu/e)_{MC}$ was measured to be $0.61 \pm 0.03(stat.) \pm 0.05(sys.)$, consistent with previous results from the Kamiokande, IMB and Soudan-2 experiments, and smaller than expected from theoretical models of atmospheric neutrino production.
Published: 1998
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24. 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

25. [Recent studies on the history of philanthropic associations in China: private philanthropic associations in early modern China]

Author: M, Kohama
Subjects: History, 17th Century, Volunteers, China, Social Responsibility, Charities, History, 16th Century, Social Conditions, Gender Identity, History, 19th Century, Fund Raising, History, 20th Century, History, 18th Century, History, 15th Century
Published: 2011

26. Performance of hard X-ray polarimeter: PHENEX

Author: Yuji Kishimoto, S. Kishimoto, H. Tsunemi, Yoshitaka Saito, N. Anabuki, S. Gunji, Y. Tanaka, M. Yamauchi, M. Suzuki, N. Toukairin, M. Kohama, H. Sakurai, F. Tokanai, T. Mihara, K. Hayashida, and N. Fujita
Subjects: Physics, Polarimetry, Polarimeter, Astrophysics
Abstract: Shuichi Gunji, Yuji Kishimoto, Makoto Kanno Akihiro Murayama Yasuhiro Ishigaki Yushi Ishikawa Kyoko Katayama Kiyoshi Hayashida Naohisa Anabuki Shinji Morimoto Tatehiro Mihara Mitsuhiro Kohama Motoko Suzuki Shunji Kishimoto Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan Osaka Univ., 1-1 Machikaneyama-machi Toyonaka, Osaka 560-0043, Japan RIKEN, 2-1 Hirosawa, Wako Saitama ,351-0198, Japan KEK-PF, Tsukuba, Ibaraki 305-0801, Japan
Published: 2010
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27. The First Light from MAXI onboard JEM (Kibo)-EF on ISS

Author: M. Matsuoka, M. Suzuki, K. Kawasaki, S. Ueno, H. Tomida, Y. Adachi, M. Ishikawa, Y. Itamoto, D. Takahashi, H. Katayama, K. Ebisawa, T. Mihara, M. Kohama, M. Sugizaki, Y. Nakagawa, T. Yamamoto, H. Tsunemi, M. Kimura, N. Kawai, M. Morii, K. Sugimori, A. Yoshida, K. Yamaoka, S. Nakahira, I. Takahashi, H. Negoro, M. Nakajima, R. Ishiwata, S. Miyoshi, H. Ozawa, Y. Ueda, N. Isobe, S. Eguchi, K. Hiroi, M. Yamauchi, A. Daikuuji, A. Comastri, L. Angelini, and M. Cappi
Subjects: Physics, Pulsar, Sky, media_common.quotation_subject, Observation period, Astronomy, Astrophysics, First light, Gamma-ray burst, media_common
Abstract: MAXI, the first astronomical payload attached to ISS JEM‐EF, began operation on August 3, 2009 for monitoring all‐sky X‐ray images every ISS orbit (92 min). This paper reports the first results obtained during the 1‐month test observations. All instruments as well as two main X‐ray slit cameras, the GSC and SSC, worked as we expected. The detection limits of MAXI‐GSC are about 25 mCrab and 8 mCrab for one ISS orbit (92 min) and 1‐day observations, respectively. GSC covers about 76% and 96% of the entire sky for respective single‐orbit and 1‐day observations. MAXI has detected a transient X‐ray pulsar A0535+26, an X‐ray burst, and a gamma‐ray burst in the first month of the test observation period.
Published: 2010
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28. MAXI Nova Alert System and the Latest Scientific Results

Author: H. Negoro, S. Miyoshi, H. Ozawa, R. Ishiwata, N. Nakajima, M. Matsuoka, K. Kawasaki, S. Ueno, H. Tomida, M. Suzuki, M. Ishikawa, T. Mihara, M. Kohama, M. Sugizaki, Y. Nakagawa, H. Tsunemi, N. Kawai, M. Morii, A. Yoshida, K. Yamaoka, Y. Ueda, N. Isobe, S. Eguchi, A. Comastri, L. Angelini, and M. Cappi
Subjects: Physics, media_common.quotation_subject, Radio equipment, Real-time computing, Astronomy, Nova (laser), law.invention, Radio telescope, Telescope, Sky, law, International Space Station, Transient (computer programming), Alert system, media_common
Abstract: MAXI, Monitor of All‐sky X‐ray Image, is the first astronomical telescope onboard the ISS. One of the main goals of our mission is to discover new transient objects by scanning more than 95% of the sky every ∼92 min with two types of X‐ray cameras, Gas Slit Camera (GSC) and Solid‐state Slit Camera (SSC) [1].We have developed a completely new data analysis system, a nova alert system, to find transient objects and send alerts to the world as soon as possible. Here we describe the current status of the system, and transient objects discovered with the system.
Published: 2010
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29. The PHENEX experiment result

Author: N. Anabuke, Y. Ishikawa, F. Tokanai, S. Gunji, Makoto Kanno, Yoshitaka Saito, Yuji Kishimoto, H. Sakurai, T. Mihara, M. Kohama, H. Tsunemi, M. Suzuki, and K. Hayashida
Subjects: Engineering, business.industry, business
Published: 2009
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30. Performance and current status of Monitor of All-sky X-ray Image on the International Space Station

Author: M. Suzuki, M. Matsuoka, K. Kawasaki, S. Ueno, H. Tomida, M. Kohama, M. Ishikawa, H. Katayama, T. Mihara, N. Isobe, H. Tsunemi, E. Miyata, H. Negoro, M. Nakajima, N. Kawai, J. Kataoka, A. Yoshida, K. Yamaoka, M. Morii, M. Galassi, David Palmer, and Ed Fenimore
Subjects: Physics, Sky, media_common.quotation_subject, International Space Station, X ray image, Astronomy, Gamma-ray burst, Remote sensing, media_common
Abstract: Monitor of All‐sky X‐ray Image (MAXI) will be launched and attached on the International Space Station (ISS) next year. MAXI scans the sky while ISS goes around the Earth and provides an all sky X‐ray image every orbit. MAXI has two types of X‐ray instruments: gas‐proportional counters for 2–30 keV and CCD cameras for 0.5–10 keV. MAXI will be able to transmit alerts to the Internet on X‐ray transients including bright X‐ray afterglows.
Published: 2008
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31. 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
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32. 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
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33. 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

34. 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

35. Design, construction, and operation of SciFi tracking detector for K2K experiment

Author: A Suzuki, H Park, S Aoki, S Echigo, K Fujii, T Hara, T Iwashita, M Kitamura, M Kohama, G Kume, M Onchi, T Otaki, K Sato, M Takatsuki, K Takenaka, Y Tanaka, K Tashiro, T Inagaki, I Kato, S Mukai, T Nakaya, K Nishikawa, N Sasao, A Shima, H Yokoyama, T Chikamatsu, Y Hayato, T Ishida, T Ishii, H Ishino, E.J Jeon, T Kobayashi, S.B Lee, K Nakamura, Y Oyama, A Sakai, M Sakuda, V Tumakov, S Fukuda, Y Fukuda, M Ishizuka, Y Itow, T Kajita, J Kameda, K Kaneyuki, K Kobayashi, Y Kobayashi, Y Koshio, M Miura, S Moriyama, M Nakahata, S Nakayama, Y Obayashi, A Okada, N Sakurai, M Shiozawa, Y Suzuki, H Takeuchi, Y Takeuchi, Y Totsuka, T Toshito, S Yamada, K Miyano, M Nakamura, N Tamura, I Nakano, M Yoshida, T Kadowaki, S Kishi, T Maruyama, M Etoh, K Nishijima, H.C Bhang, B.H Khang, B.J Kim, H.I Kim, J.H Kim, S.B Kim, H So, J.H Yoo, J.H Choi, H.I Jang, J.S Jang, J.Y Kim, I.T Lim, M.Y Pac, E Kearns, K Scholberg, J.L Stone, L.R Sulak, C.W Walter, D Casper, W Gajewski, W Kropp, S Mine, H Sobel, M Vagins, S Matsuno, J Hill, C.K Jung, K Martens, C Mauger, C McGrew, E Sharkey, C Yanagisawa, H Berns, S Boyd, J Wilkes, D Kielczewska, and U Golebiewska
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, business.industry, Physics::Instrumentation and Detectors, Track (disk drive), Noise reduction, Detector, FOS: Physical sciences, Tracking (particle physics), Particle identification, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, K2K experiment, High Energy Physics::Experiment, business, Neutrino oscillation, Instrumentation
Abstract: We describe the construction and performance of a scintillating fiber detector used in the near detector for the K2K (KEK to Kamioka, KEK E362) long baseline neutrino oscillation experiment. The detector uses 3.7 m long and 0.692 mm diameter scintillating fiber coupled to image-intensifier tubes (IIT), and a CCD camera readout system. Fiber sheet production and detector construction began in 1997, and the detector was commissioned in March, 1999. Results from the first K2K runs confirm good initial performance : position resolution is estimated to be about 0.8 mm, and track finding efficiency is $98 \pm 2$ % for long tracks (i.e., those which intersect more than 5 fiber planes). The hit efficiency was estimated to be $92 \pm 2$ % using cosmic-ray muons, after noise reduction at the offline stage. The possibility of using the detector for particle identification is also discussed., Comment: In total 21 pages with 18 figures. THis is the proceedings for "The 7th International Conference on Instrumentation for Colliding Beam Physics", held on Hamamatsu, Japan, Nov. 15-19, 1999
Published: 2000
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36. 16-N as a calibration source for Super-Kamiokande

Author: E Blaufuss, G Guillian, Y Fukuda, S Fukuda, M Ishitsuka, Y Itow, T Kajita, J Kameda, K Kaneyuki, K Kobayashi, Y Kobayashi, Y Koshio, M Miura, S Moriyama, M Nakahata, S Nakayama, Y Obayashi, A Okada, K Okumura, N Sakurai, M Shiozawa, Y Suzuki, H Takeuchi, Y Takeuchi, T Toshito, Y Totsuka, S Yamada, M Earl, A Habig, 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, L.R Price, M 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 Oyama, A Sakai, M Sakuda, O Sasaki, S Echigo, M Kohama, A.T Suzuki, T Inagaki, K Nishikawa, T.J Haines, B.K Kim, R Sanford, R Svoboda, M.L Chen, J.A Goodman, G.W Sullivan, J Hill, C.K Jung, K Martens, M Malek, C Mauger, C McGrew, E Sharkey, B Viren, C Yanagisawa, M Kirisawa, S Inaba, C Mitsuda, K Miyano, H Okazawa, C Saji, M Takahashi, M Takahata, Y Nagashima, K Nitta, M Takita, M Yoshida, S.B Kim, 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
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Scale (ratio), Physics::Instrumentation and Detectors, Solar neutrino, Detector, Isotropy, FOS: Physical sciences, Linear particle accelerator, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Neutron generator, Calibration, Physics::Accelerator Physics, Super-Kamiokande, Instrumentation
Abstract: The decay of 16-N is used to cross check the absolute energy scale calibration for solar neutrinos established by the electron linear accelerator (LINAC). A deuterium-tritium neutron generator was employed to create 16-N via the (n,p) reaction on 16-O in the water of the detector. This technique is isotropic and has different systematic uncertainties than the LINAC. The results from this high statistics data sample agree with the absolute energy scale of the LINAC to better than 1%. A natural source of 16-N from the capture of mu^- on 16-O, which is collected as a background to the solar neutrino analysis, is also discussed., Comment: 20 pages, 10 figures, Submitted to NIM A, published version
Published: 2000
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37. 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

38. 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

39. [Usefulness of recombinant human erythropoietin in cardiac surgery with autologous blood transfusion]

Author: S, Takanashi, M, Kohama, K, Aoki, S, Furuta, and K, Numata
Subjects: Blood Transfusion, Autologous, Postoperative Complications, Humans, Anemia, Cardiac Surgical Procedures, Erythropoietin, Recombinant Proteins
Abstract: The efficacy and method of administration of recombinant human erythropoietin (EPO) in adult cardiac surgical patients when given preoperatively was evaluated. We used EPO intravenously (iv) with 40 mg ferric oxide for a total of consecutive 47 patients. The patients were divided into group A (n = 14; EPO 200 IU/kg iv 3 times a week from 3 weeks prior to surgery to 2 weeks after surgery, donation of 800 ml) and group B (n = 33; EPO 200 IU/kg iv everyday from 8 days prior to surgery to 2 weeks after surgery, donation of 400 ml). Control groups were group AO (n = 11; donation of 835 +/- 33 ml from 14.8 days prior to surgery) and group BO (n = 7; donation of 406 +/- 34 ml at 7.3 days prior to surgery). All the EPO-treated patients received no homologous blood transfusion while 2 of patients in group BO received some homologous blood transfusion. A hemoglobin change between pre-donation and surgery was +0.14 +/- 1.3 (g/dl) in group A, +0.04 +/- 1.0 (g/dl) in group B, -1.7 +/- 1.3 (g/dl) in group AO and -1.0 +/- 0.6 (g/dl) in group BO. In a comparison of post-surgical hemoglobin levels between group A and group B, we demonstrated that the level in group B, +2.1 +/- 1.8 (g/dl) was significantly higher than that in group A, +11.1 +/- 1.6 (g/dl) 2 weeks after surgery. There was no evidence to show an aggravation of anemia in the pre-surgical period in EPO-treated groups.(ABSTRACT TRUNCATED AT 250 WORDS)
Published: 1991

40. Changes of antithrombin III and antithrombin III-heparin complex levels, and ACT in cardiac surgery

Author: E, Inada, K, Iwahashi, K, Aoki, S, Takanashi, M, Kohama, and Y, Aoki
Subjects: Adult, Male, Cardiopulmonary Bypass, Whole Blood Coagulation Time, Heart Diseases, Heparin, Antithrombin III, Humans, Female, Partial Thromboplastin Time, Blood Coagulation Tests, Middle Aged
Published: 1990

41. 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
Full Text: View/download PDF

42. EFFECTS OF PROTAMINE ON ACT AND ANTITHROM-BIN III-HEPARIN COMPLEX DURING CARDIAC SURGERY

Author: Furuta S, M. Kohama, H. Aoki, S. Takanashi, Aoki K, K. Iwahashi, and E. Inada
Subjects: medicine.medical_specialty, biology, business.industry, Heparin, Protamine, Bin, Cardiac surgery, Anesthesiology and Pain Medicine, Internal medicine, medicine, biology.protein, Cardiology, business, medicine.drug
Published: 1991
Full Text: View/download PDF

43. [A case of total exclusion of thoracoabdominal aortic aneurysm for the DeBakey IIIb type of dissecting aneurysm--with special reference to the problem of the spinal cord injury]

Author: Y, Oka, T, Miyamoto, H, Murata, H, Ohashi, K, Yamashita, and M, Kohama
Subjects: Male, Aortic Dissection, Humans, Aorta, Thoracic, Aorta, Abdominal, Middle Aged, Aortic Aneurysm
Published: 1985

44. [Changes in PTCA in candidates for coronary artery bypass grafting]

Author: S, Suehiro, Y, Shimizu, S, Iwaoka, H, Terai, M, Kohama, and S, Takanashi
Subjects: Male, Humans, Coronary Disease, Female, Coronary Artery Bypass, Middle Aged, Angioplasty, Balloon
Published: 1987

45. [Internal mammary artery graft for myocardial revascularization in patients 70 years of age and older]

Author: S, Suehiro, Y, Shimizu, S, Iwaoka, H, Terai, M, Kohama, and S, Takanashi
Subjects: Male, Age Factors, Humans, Coronary Disease, Female, Saphenous Vein, Coronary Artery Bypass, Internal Mammary-Coronary Artery Anastomosis, Aged
Published: 1987

46. [Left atrial myxoma growing into the right atrium with two separate lesions in the left atrium--a case report]

Author: Y, Oka, T, Miyamoto, K, Aoki, K, Kitai, M, Kohama, and T, Yamamoto
Subjects: Adult, Heart Neoplasms, Neoplasms, Multiple Primary, Humans, Female, Heart Atria, Myxoma, Ultrasonography
Published: 1985

47. [Total removal of infected pacemaker electrodes with cardiopulmonary bypass]

Author: M, Kohama, S, Takanashi, K, Aoki, S, Furuta, H, Takada, K, Sagara, and T, Fu
Subjects: Pacemaker, Artificial, Cardiopulmonary Bypass, Sepsis, Humans, Female, Electrodes, Aged
Published: 1988

48. [A case report of simultaneous myocardial revascularization and carotid patch angioplasty]

Author: S, Suehiro, Y, Simizu, M, Kohama, H, Yao, and K, Terashita
Subjects: Carotid Artery Diseases, Male, Methods, Humans, Coronary Disease, Constriction, Pathologic, Coronary Artery Bypass, Middle Aged, Carotid Artery, Internal
Published: 1988

49. [A case of multilocular cystic nephroma]

Author: H, Ohmine, M, Kohama, K, Ohshiro, N, Tamaki, T, Nakamoto, S, Makiya, Y, Takasato, and Y, Nagamine
Subjects: Polycystic Kidney Diseases, Humans, Infant, Female, Tomography, X-Ray Computed
Published: 1987

50. [Pathophysiology of various disease conditions--current concepts. 6. Cerebral apoplexy]

Author: M, Kohama
Subjects: Cerebrovascular Disorders
Published: 1972

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