Ahn, M. H.Aliu, E.Andringa, S.Aoki, S.Aoyama, Y.Argyriades, J.Asakura, K.Ashie, R.Berghaus, F.Berns, H. G.Bhang, H.Blondel, A.Borghi, S.Bouchez, J.Boyd, S. C.Burguet-Castell, J.Casper, D.Catala, J.Cavata, C.Cervera, A.Chen, S. M.Cho, K. O.Choi, J. H.Dore, U.Echigo, S.Espinal, X.Fechner, M.Fernandez, E.Fujii, K.Fujii, Y.Fukuda, S.Fukuda, Y.Gomez-Cadenas, J. J.Gran, R.Hara, T.Hasegawa, M.Hasegawa, T.Hayashi, K.Hayato, Y.Helmer, R. L.Higuchi, I.Hill, J.Hiraide, K.Hirose, E.Hosaka, J.Ichikawa, A. K.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, H. I.Jang, J. S.Jeon, E. J.Jeong, I. S.Joo, K. K.Jover, G.Jung, C. K.Kajita, T.Kameda, J.Kaneyuki, K.Kang, B. H.Kato, I.Kato, Y.Kearns, E.Kerr, D.Kim, C. O.Khabibullin, M.Khotjantsev, A.Kielczewska, D.Kim, B. J.Kim, H. I.Kim, J. H.Kim, J. Y.Kim, S. B.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.Lim, I. T.Lim, S. H.Loverre, P. F.Ludovici, L.Maesaka, H.Mallet, J.Mariani, CamilloMartens, K.Maruyama, T.Matsuno, S.Matveev, V. A.Mauger, C.Mahn, K. B. M.McGrew, C.Mikheyev, S.Minakawa, M.Minamino, A.Mine, S.Mineev, O.Mitsuda, C.Mitsuka, G.Miura, M.Moriguchi, Y.Morita, T.Moriyama, S.Nakadaira, T.Nakahata, M.Nakamura, K.Nakano, I.Nakata, F.Nakaya, T.Nakayama, S.Namba, T.Nambu, R.Nawang, S.Nishikawa, K.Nishino, H.Nishiyama, S.Nitta, K.Noda, S.Noumi, H.Nova, F.Novella, P.Obayashi, Y.Okada, A.Okumura, K.Okumura, M.Onchi, M.Ooyabu, T.Oser, S. M.Otaki, T.Oyama, Y.Pac, M. Y.Park, H.Pierre, F.Rodriguez, A.Saji, C.Sakai, A.Sakuda, M.Sakurai, N.Sanchez, F.Sarrat, A.Sasaki, T.Sato, H.Sato, K.Scholberg, K.Schroeter, R.Sekiguchi, M.Seo, E.Sharkey, E.Shima, A.Shiozawa, M.Shiraishi, K. K.Sitjes, G.Smy, M.So, H.Sobel, H.Sorel, M.Stone, J.Sulak, L.Suga, Y.Suzuki, A.Suzuki, Y.Suzuki, Y.Tada, M.Takahashi, T.Takasaki, M.Takatsuki, M.Takenaga, Y.Takenaka, K.Takeuchi, H.Takeuchi, Y.Taki, K.Takubo, Y.Tamura, N.Tanaka, H.Tanaka, K.Tanaka, M.Tanaka, Y.Tashiro, K.Terri, R.T'Jampens, S.Tornero-Lopez, A.Toshito, T.Totsuka, Y.Ueda, S.Vagins, M. R.Whitehead, L.Walter, C. W.Wang, W.Wilkes, R. J.Yamada, S.Yamada, Y.Yamamoto, S.Yamanoi, Y.Yanagisawa, C.Yershov, N.Yokoyama, H.Yokoyama, M.Yoo, J.Yoshida, M.Zalipska, J.2018-01-102018-01-102006-10-012470-0010http://hdl.handle.net/10919/81650We present measurements of ν_μ 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^+9.2<sub-8.6</sub> events without oscillation. A distortion of the energy spectrum is also seen in 58 single-ring muon-like 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 &#916;m² region at sin² 2θ = 1 is between 1.9 and 3.5 × 10⁻³ eV² at the 90% C.L. with a best-fit value of 2.8 × 10⁻³ eV².? - ? (39) page(s)In CopyrightAstronomy & AstrophysicsPhysics, Particles & FieldsPhysicsSINGLE-PION-PRODUCTIONCHARGED-CURRENT INTERACTIONSCROSS-SECTION MEASUREMENTSSCIBAR DETECTORCONSTRUCTIONPHYSICSSYSTEMCALORIMETERSCATTERINGCOLLISIONSArticle - Refereedhttps://doi.org/10.1103/PhysRevD.74.072003747Mariani, C [0000-0003-3284-4681]2470-0029