Indications of neutrino oscillation in a 250 km long-baseline experiment

M. H. Ahn*, S. Aoki, H. Bhang, S. Boyd, D. Casper, J. H. Choi, S. Fukuda, Y. Fukuda, W. Gajewski, T. Hara, M. Hasegawa, T. Hasegawa, Y. Hayato, J. Hill, A. K. Ichikawa, A. Ikeda, T. Inagaki, T. Ishida, T. Ishii, M. IshitsukaY. Itow, T. Iwashita, H. I. Jang, J. S. Jang, E. J. Jeon, C. K. Jung, T. Kajita, J. Kameda, K. Kaneyuki, I. Kato, E. Kearns, A. Kibayashi, D. Kielczewska, K. Kobayashi, B. J. Kim, C. O. Kim, J. Y. Kim, S. B. Kim, T. Kobayashi, M. Kohama, Y. Koshio, W. R. Kropp, J. G. Learned, S. H. Lim, I. T. Lim, H. Maesaka, K. Martens, T. Maruyama, S. Matsuno, C. Mauger, C. Mcgrew, S. Mine, M. Miura, K. Miyano, S. Moriyama, M. Nakahata, K. Nakamura, I. Nakano, F. Nakata, T. Nakaya, S. Nakayama, T. Namba, K. Nishikawa, S. Nishiyama, S. Noda, A. Obayashi, A. Okada, T. Ooyabu, Y. Oyama, M. Y. Pac, H. Park, M. Sakuda, N. Sakurai, N. Sasao, K. Scholberg, E. Sharkey, M. Shiozawa, H. So, H. W. Sobel, A. Stachyra, J. L. Stone, Y. Suga, L. R. Sulak, A. Suzuki, Y. Suzuki, Y. Takeuchi, N. Tamura, T. Toshito, Y. Totsuka, M. R. Vagins, C. W. Walter, R. J. Wilkes, S. Yamada, S. Yamamoto, C. Yanagisawa, H. Yokoyama, J. Yoo, M. Yoshida, J. Zalipska

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

896 Citations (Scopus)

Abstract

A study was performed on Kamioka long-baseline neutrino oscillation experiment (K2K). The indications of neutrino oscillation such as a reduction of flux together with a distortion of the energy spectrum were observed in the experiment. In Super Kamiokande (SK), 250 km from the neutrino production point, fifty-six beam neutrino events were observed. It was found that the probability that the measurements at SK is explained by statistical fluctuation without neutrino oscillation is less than 1%.

Original languageEnglish
Article number041801
Pages (from-to)418011-418015
Number of pages5
JournalPhysical Review Letters
Volume90
Issue number4
Publication statusPublished - 2003 Jan 31
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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