{"paper":{"title":"Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Ariga, A. Blondel, A. Bravar, A. Cervera, A.C. Kaboth, A. Clifton, A. Dabrowska, A.D. Marino, A. Ereditato, A. Garcia, A. Hillairet, A. Himmel, A. Izmaylov, A. Jacob, A.J. Finch, A. Khotjantsev, A.K. Ichikawa, A. Knight, A. Knox, A. Konaka, A. Kopylov, A. Korzenev, A. Longhin, A. Mefodiev, A. Minamino, A. Missert, A.P. Furmanski, A. Redij, A. Rubbia, A. Rychter, A. Shaikhiev, A. Suzuki, A. Takeda, A. Vacheret, A. Weber, A. Zalewska, B. Jamieson, B. Popov, B. Quilain, C. Andreopoulos, C. Bronner, C. Densham, C. Giganti, C.K. Jung, C. McGrew, C. Nantais, C. Nielsen, C. Pistillo, C. Riccio, C. Touramanis, C. Wilkinson, C.W. Walter, C. Yanagisawa, D. Autiero, D. Brailsford, D. Cherdack, D. Dewhurst, D. Fukuda, D. Hansen, D. Karlen, D. Kielczewska, D. Payne, D.R. Hadley, D. Sgalaberna, D. Shaw, D. Terhorst, D. Wark, E.D. Zimmerman, E. Iwai, E. Kearns, E. Larkin, E. Mazzucato, E. Radicioni, E. Reinherz-Aronis, E. Rondio, E. Scantamburlo, E.S. Pinzon Guerra, F. Bay, F. Di Lodovico, F. Gizzarelli, F. Hosomi, F. S\\'anchez, F. Sato, F. Shaker, G.A. Fiorentini, G. Barr, G. Christodoulou, G. Collazuol, G. De Rosa, G.J. Barker, G. Vasseur, H.A. Tanaka, H. Kakuno, H. Kim, H.K. Tanaka, H.M. O'Keeffe, H. Sekiya, I. Karpikov, I. Lamont, J. Caravaca Rodr\\'iguez, J. Coleman, J.D. Perkin, J. Dumarchez, J.F. Martin, J.H. Jo, J. Holeczek, J. Imber, J. Insler, J. Kameda, J. Kim, J. Kisiel, J. Lagoda, J.L. Palomino, J. Marteau, J.-M. Poutissou, J. Myslik, J. Nowak, J.P. Lopez, J.R. Wilson, J. Schwehr, J. Steinmann, J.T. Sobczyk, J. Yoo, J. Zalipska, J. \\.Zmuda, K.D. Nakamura, K.E. Duffy, K.G. Nakamura, K. Huang, K. Ieki, K. Iwamoto, K. Kondo, K. Mahn, K. Mavrokoridis, K. Nakamura, K. Nakayoshi, K. Nishikawa, K. Okumura, K. Sakashita, K. Scholberg, K.S. McFarland, K. Suzuki, K. Wakamatsu, K. Yamamoto, K. Yoshida, K. Zaremba, L. Cremonesi, L.F. Thompson, L. Haegel, L. Koch, L.L. Kormos, L. Ludovici, L. Magaletti, L. Pickard, L. Pickering, L. Southwell, L. Zambelli, M.A.M. Rayner, M. Antonova, M. Barbi, M. Batkiewicz, M. Buizza Avanzini, M.D. Haigh, M. Dziewiecki, M. Friend, M.G. Catanesi, M. Gonin, M. Hartz, M. Hierholzer, M. Hogan, M. Ikeda, M. Jiang, M.J. Wilking, M. Kabirnezhad, M. Khabibullin, M. Laveder, M. Lawe, M. Lazos, M. Malek, M. McCarthy, M. Mezzetto, M. Miura, M. Nakahata, M. Nirkko, M.O. Wascko, M. Pavin, M. Posiadala-Zezula, M. Ravonel, M. Scott, M. Shiozawa, M. Smy, M. Sorel, M. Tada, M. Tzanov, M. Vagins, M. Yamamoto, M. Yokoyama, M. Yu, M. Ziembicki, M. Zito, N.C. Hastings, N. Chikuma, N.D. Patel, N. Grant, N. McCauley, N. Yershov, O. Drapier, O. Mineev, P. Bartet-Friburg, P.F. Denner, P. Hamilton, P. Jonsson, P. Martins, P. Mijakowski, P.N. Ratoff, P. Przewlocki, P. Rojas, P. Stamoulis, R.A. Intonti, R.A. Owen, R. Castillo, R.G. Calland, R.J. Wilkes, R.J. Wilson, R. Kurjata, R.L. Helmer, R. Ohta, R.P. Litchfield, R. Poutissou, R. Sacco, R. Shah, R. Tacik, R. Terri, R. Wendell, S. Aoki, S. Assylbekov, S.B. Boyd, S. Berkman, S. Bhadra, S. Bolognesi, S. Bordoni, S. Cao, S. Di Luise, S. Dolan, S. Dytman, S. Emery-Schrenk, S.G. Giffin, S. Hirota, S. Horikawa, S. Johnson, S. King, S.L. Cartwright, S. Manly, S. Martynenko, S. Mine, S. Moriyama, S.M. Oser, S. Murphy, S. Nakayama, S.R. Dennis, S. Roth, S. Schoppmann, S. Short, S. Suvorov, S. Takahashi, S. Tobayama, S. Yen, S.Y. Suzuki, T2K Collaboration: K. Abe, T. Dealtry, T. Feusels, Th.A. Mueller, T. Hara, T. Hasegawa, T. Hayashino, T. Hiraki, T. Ishida, T. Ishii, T.J. Irvine, T. Kajita, T. Katori, T. Kikawa, T. Kobayashi, T. Koga, T. Kutter, T. Lindner, T. Maruyama, T. Nakadaira, T. Nakaya, T. Okusawa, T. Ovsyannikova, T. Sekiguchi, T. Shirahige, T. Stewart, T. Thakore, T. Tomura, T. Tsukamoto, T. Wachala, T. Yano, T. Yuan, V. Berardi, V. Galymov, V. Matveev, V. Palladino, V. Paolone, W. Kropp, W. Oryszczak, W. Toki, W. Warzycha, W.Y. Ma, X. Li, X. Lu, Y. Fujii, Y. Fukuda, Y. Hayato, Y. Koshio, Y. Kudenko, Y. Nishimura, Y. Oyama, Y. Petrov, Y. Seiya, Y. Suda, Y. Suzuki, Y. Takeuchi, Y. Uchida, Y. Yamada, Z.J. Liptak, Z. Vallari","submitted_at":"2015-12-08T15:03:24Z","abstract_excerpt":"T2K reports its first measurements of the parameters governing the disappearance of $\\bar{\\nu}_\\mu$ in an off-axis beam due to flavor change induced by neutrino oscillations. The quasimonochromatic $\\bar{\\nu}_\\mu$ beam, produced with a peak energy of 0.6 GeV at J-PARC, is observed at the far detector Super-Kamiokande, 295 km away, where the $\\bar{\\nu}_\\mu$ survival probability is expected to be minimal. Using a dataset corresponding to $4.01 \\times 10^{20}$ protons on target, $34$ fully contained $\\mu$-like events were observed. The best-fit oscillation parameters are $\\sin^2 (\\bar{\\theta}_{23"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.02495","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}