Measurement of neutrino oscillation by the K2K experiment

Published

Journal Article

We present measurements of νμ disappearance in K2K, the KEK to Kamioka long-baseline neutrino oscillation experiment. One-hundred and twelve beam-originated neutrino events are observed in the fiducial volume of Super-Kamiokande with an expectation of 158.1-8.6+9.2 events without oscillation. A distortion of the energy spectrum is also seen in 58 single-ring muonlike events with reconstructed energies. The probability that the observations are explained by the expectation for no neutrino oscillation is 0.0015% (4.3σ). In a two-flavor oscillation scenario, the allowed Δm2 region at sin 22θ=1 is between 1.9 and 3.5×10-3eV2 at the 90% C.L. with a best-fit value of 2.8×10-3eV2. © 2006 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Ahn, MH; Aliu, E; Andringa, S; Aoki, S; Aoyama, Y; Argyriades, J; Asakura, K; Ashie, R; Berghaus, F; Berns, HG; Bhang, H; Blondel, A; Borghi, S; Bouchez, J; Boyd, SC; Burguet-Castell, J; Casper, D; Catala, J; Cavata, C; Cervera, A; Chen, SM; Cho, KO; Choi, JH; Dore, U; Echigo, S; Espinal, X; Fechner, M; Fernandez, E; Fujii, K; Fujii, Y; Fukuda, S; Fukuda, Y; Gomez-Cadenas, J; Gran, R; Hara, T; Hasegawa, M; Hasegawa, T; Hayashi, K; Hayato, Y; Helmer, RL; Higuchi, I; Hill, J; Hiraide, K; Hirose, E; Hosaka, J; Ichikawa, AK; Ieiri, M; Iinuma, M; Ikeda, A; Inagaki, T; Ishida, T; Ishihara, K; Ishii, H; Ishii, T; Ishino, H; Ishitsuka, M; Itow, Y; Iwashita, T; Jang, HI; Jang, JS; Jeon, EJ; Jeong, IS; Joo, KK; Jover, G; Jung, CK; Kajita, T; Kameda, J; Kaneyuki, K; Kang, BH; Kato, I; Kato, Y; Kearns, E; Kerr, D; Kim, CO; Khabibullin, M; Khotjantsev, A; Kielczewska, D; Kim, BJ; Kim, HI; Kim, JH; Kim, JY; Kim, SB; Kitamura, M; Kitching, P; Kobayashi, K; Kobayashi, T; Kohama, M; Konaka, A; Koshio, Y; Kropp, W; Kubota, J; Kudenko, Y; Kume, G; Kuno, Y; Kurimoto, Y; Kutter, T; Learned, J; Likhoded, S

Published Date

  • October 20, 2006

Published In

Volume / Issue

  • 74 / 7

Electronic International Standard Serial Number (EISSN)

  • 1550-2368

International Standard Serial Number (ISSN)

  • 1550-7998

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.74.072003

Citation Source

  • Scopus