Search for electron neutrino appearance in a 250 km long-baseline experiment

M. H. Ahn, S. Aoki, Y. Ashie, H. Bhang, S. Boyd, D. Casper, J. H. Choi, S. Fukuda, Y. Fukuda, R. Gran, T. Hara, M. Hasegawa, T. Hasegawa, K. Hayashi, Y. Hayato, J. Hill, A. K. Ichikawa, A. Ikeda, T. Inagaki, T. IshidaT. Ishii, M. Ishitsuka, Y. Itow, T. Iwashita, H. I. Jang, J. S. Jang, E. J. Jeon, K. K. Joo, C. K. Jung, T. Kajita, J. Kameda, K. Kaneyuki, I. Kato, E. Kearns, A. Kibayashi, D. Kielczewska, B. J. Kim, C. O. Kim, J. Y. Kim, S. B. Kim, K. Kobayashi, T. Kobayashi, Y. Koshio, W. R. Kropp, J. G. Learned, S. H. Lim, I. T. Lim, H. Maesaka, T. Maruyama, S. Matsuno, C. Mauger, C. Mcgrew, A. Minamino, S. Mine, M. Miura, K. Miyano, T. Morita, S. Moriyama, M. Nakahata, K. Nakamura, I. Nakano, F. Nakata, T. Nakaya, S. Nakayama, T. Namba, R. Nambu, K. Nishikawa, S. Nishiyama, S. Noda, Y. Obayashi, A. Okada, Y. Oyama, M. Y. Pac, H. Park, C. Saji, M. Sakuda, A. Sarrat, T. Sasaki, N. Sasao, K. Scholberg, M. Sekiguchi, E. Sharkey, M. Shiozawa, K. K. Shiraishi, M. Smy, H. W. Sobel, J. L. Stone, Y. Suga, L. R. Sulak, A. Suzuki, Y. Suzuki, Y. Takeuchi, N. Tamura, M. Tanaka, Y. Totsuka, S. Ueda, M. R. Vagins, C. W. Walter, W. Wang, R. J. Wilkes, S. Yamada, S. Yamamoto, C. Yanagisawa, H. Yokoyama, J. Yoo, M. Yoshida, J. Zalipska

研究成果: Article査読

61 被引用数 (Scopus)

抄録

The search for electron neutrino appearance from accelerator-produced muon neutrinos in the K2K 250 km long-baseline neutrino experiment was described. It was observed that one electron event was found in the data corresponding to an exposure of 4.8 × 1019 protons on target. The number of expected background neutrino events in the absence of neutrino oscillations was found to be 2.4±0.6 events and was found to be dominated by misidentification of events from neutral current production. The probability density function of the expected number of electron events was evaluated from the the Poisson distribution, which was convoluted with systematic uncertainty.

本文言語English
論文番号051801
ページ(範囲)051801-1-051801-5
ジャーナルPhysical review letters
93
5
DOI
出版ステータスPublished - 2004 7 30
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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