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

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. HillS. 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, S. Y. You

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232 Citations (Scopus)


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 37.8-3.8 +3.5, 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.

Original languageEnglish
Pages (from-to)178-184
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2-4
Publication statusPublished - 2001 Jul 5

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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