T. Iwashita
Kobe University
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Publication
Featured researches published by T. Iwashita.
Physical Review Letters | 2003
M. H. Ahn; S. Aoki; Hyoung Chan Bhang; S. Boyd; David William Casper; Jin-Oh Choi; Satoru Fukuda; Y. Fukuda; W. Gajewski; T. Hara; M. Hasegawa; T. Hasegawa; Y. Hayato; J. Hill; Atsushi Ichikawa; A. Ikeda; T. Inagaki; T. Ishida; T. Ishii; M. Ishitsuka; Y. Itow; T. Iwashita; H.I. Jang; J. S. Jang; E. J. Jeon; C. K. Jung; T. Kajita; J. Kameda; K. Kaneyuki; I. Kato
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%.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2003
B.J Kim; T. Iwashita; T. Ishida; E. J. Jeon; H. Yokoyama; S. Aoki; H. G. Berns; Hyoung Chan Bhang; S. Boyd; K. Fujii; T. Hara; Y. Hayato; J. Hill; T. Ishii; H. Ishino; C. K. Jung; E. Kearns; Hyun-Jeong Kim; Joong Hyun Kim; Jae-Joong Kim; S. B. Kim; Tooru Kobayashi; G. Kume; S. Matsuno; S. Mine; K. Nakamura; M Nakamura; K. Nishikawa; M. Onchi; T. Otaki
The K2K long-baseline neutrino oscillation experiment uses a Scintillating Fiber Detector (SciFi) to reconstruct charged particles produced in neutrino interactions in the near detector. We describe the track reconstruction algorithm and the performance of the SciFi after 3 years of operation.
