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. 2006 Oct 27;97(17):171801.
doi: 10.1103/PhysRevLett.97.171801. Epub 2006 Oct 23.

Measurement of atmospheric neutrino flux consistent with tau neutrino appearance

K Abe  1 , Y Hayato, T Iida, K Ishihara, J Kameda, Y Koshio, A Minamino, C Mitsuda, M Miura, S Moriyama, M Nakahata, Y Obayashi, H Ogawa, M Shiozawa, Y Suzuki, A Takeda, Y Takeuchi, K Ueshima, I Higuchi, C Ishihara, M Ishitsuka, T Kajita, K Kaneyuki, G Mitsuka, S Nakayama, H Nishino, K Okumura, C Saji, Y Takenaga, Y Totsuka, S Clark, S Desai, F Dufour, E Kearns, S Likhoded, M Litos, J L Raaf, J L Stone, L R Sulak, W Wang, M Goldhaber, D Casper, J P Cravens, W R Kropp, D W Liu, S Mine, C Regis, M B Smy, H W Sobel, M R Vagins, K S Ganezer, J E Hill, W E Keig, J S Jang, J Y Kim, I T Lim, K Scholberg, N Tanimoto, C W Walter, R Wendell, R W Ellsworth, S Tasaka, E Guillian, J G Learned, S Matsuno, M D Messier, A K Ichikawa, T Ishida, T Ishii, T Iwashita, T Kobayashi, T Nakadaira, K Nakamura, K Nitta, Y Oyama, A T Suzuki, M Hasegawa, I Kato, H Maesaka, T Nakaya, K Nishikawa, T Sasaki, H Sato, S Yamamoto, M Yokoyama, T J Haines, S Dazeley, S Hatakeyama, R Svoboda, G W Sullivan, A Habig, R Gran, Y Fukuda, T Sato, Y Itow, T Koike, C K Jung, T Kato, K Kobayashi, M Malek, C McGrew, A Sarrat, R Terri, C Yanagisawa, N Tamura, M Sakuda, M Sugihara, Y Kuno, M Yoshida, S B Kim, J Yoo, T Ishizuka, H Okazawa, Y Choi, H K Seo, Y Gando, T Hasegawa, K Inoue, H Ishii, K Nishijima, H Ishino, Y Watanabe, M Koshiba, D Kielczewska, J Zalipska, H G Berns, K K Shiraishi, K Washburn, R J Wilkes; Super-Kamiokande Collaboration
Affiliations

Measurement of atmospheric neutrino flux consistent with tau neutrino appearance

K Abe et al. Phys Rev Lett. .

Abstract

A search for the appearance of tau neutrinos from nu(mu) <--> nu(tau) oscillations in the atmospheric neutrinos has been performed using 1489.2 days of atmospheric neutrino data from the Super-Kamiokande-I experiment. A best fit tau neutrino appearance signal of 138+/-48(stat)-32(+15)(syst) events is obtained with an expectation of 78+/-26(syst). The hypothesis of no tau neutrino appearance is disfavored by 2.4 sigma.

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