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Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam

  • K. Abe
  • , C. Andreopoulos
  • , M. Antonova
  • , S. Aoki
  • , A. Ariga
  • , S. Assylbekov
  • , D. Autiero
  • , M. Barbi
  • , G. J. Barker
  • , G. Barr
  • , P. Bartet-Friburg
  • , M. Batkiewicz
  • , F. Bay
  • , V. Berardi
  • , S. Berkman
  • , S. Bhadra
  • , A. Blondel
  • , S. Bolognesi
  • , S. Bordoni
  • , S. B. Boyd
  • D. Brailsford, A. Bravar, C. Bronner, M. Buizza Avanzini, R. G. Calland, S. Cao, J. Caravaca Rodríguez, S. L. Cartwright, R. Castillo, M. G. Catanesi, A. Cervera, D. Cherdack, N. Chikuma, G. Christodoulou, A. Clifton, J. Coleman, G. Collazuol, L. Cremonesi, A. Dabrowska, G. De Rosa, T. Dealtry, P. F. Denner, S. R. Dennis, C. Densham, D. Dewhurst, F. Di Lodovico, S. Di Luise, S. Dolan, O. Drapier, K. E. Duffy, J. Dumarchez, S. Dytman, M. Dziewiecki, S. Emery-Schrenk, A. Ereditato, T. Feusels, A. J. Finch, G. A. Fiorentini, M. Friend, Y. Fujii, D. Fukuda, Y. Fukuda, A. P. Furmanski, V. Galymov, A. Garcia, S. G. Giffin, C. Giganti, F. Gizzarelli, M. Gonin, N. Grant, D. R. Hadley, L. Haegel, M. D. Haigh, P. Hamilton, D. Hansen, T. Hara, M. Hartz, T. Hasegawa, N. C. Hastings, T. Hayashino, Y. Hayato, R. L. Helmer, M. Hierholzer, A. Hillairet, A. Himmel, T. Hiraki, S. Hirota, M. Hogan, J. Holeczek, S. Horikawa, F. Hosomi, K. Huang, A. K. Ichikawa, K. Ieki, M. Ikeda, J. Imber, J. Insler, R. A. Intonti, T. J. Irvine, T. Ishida, T. Ishii, E. Iwai, K. Iwamoto, A. Izmaylov, A. Jacob, B. Jamieson, M. Jiang, S. Johnson, J. H. Jo, P. Jonsson, C. K. Jung, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, D. Karlen, I. Karpikov, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, D. Kielczewska, T. Kikawa, H. Kim, J. Kim, S. King, J. Kisiel, A. Knight, A. Knox, T. Kobayashi, L. Koch, T. Koga, A. Konaka, K. Kondo, A. Kopylov, L. L. Kormos, A. Korzenev, Y. Koshio, W. Kropp, Y. Kudenko, R. Kurjata, T. Kutter, J. Lagoda, I. Lamont, E. Larkin, M. Laveder, M. Lawe, M. Lazos, T. Lindner, Z. J. Liptak, R. P. Litchfield, X. Li, A. Longhin, J. P. Lopez, L. Ludovici, X. Lu, L. Magaletti, K. Mahn, M. Malek, S. Manly, A. D. Marino, J. Marteau, J. F. Martin, P. Martins, S. Martynenko, T. Maruyama, V. Matveev, K. Mavrokoridis, W. Y. Ma, E. Mazzucato, M. McCarthy, N. McCauley, K. S. McFarland, C. McGrew, A. Mefodiev, M. Mezzetto, P. Mijakowski, A. Minamino, O. Mineev, S. Mine, A. Missert, M. Miura, S. Moriyama, Th A. Mueller, S. Murphy, J. Myslik, T. Nakadaira, M. Nakahata, K. G. Nakamura, K. Nakamura, K. D. Nakamura, S. Nakayama, T. Nakaya, K. Nakayoshi, C. Nantais, C. Nielsen, M. Nirkko, K. Nishikawa, Y. Nishimura, J. Nowak, H. M. O'Keeffe, R. Ohta, K. Okumura, T. Okusawa, W. Oryszczak, S. M. Oser, T. Ovsyannikova, R. A. Owen, Y. Oyama, V. Palladino, J. L. Palomino, V. Paolone, N. D. Patel, M. Pavin, D. Payne, J. D. Perkin, Y. Petrov, L. Pickard, L. Pickering, E. S. Pinzon Guerra, C. Pistillo, B. Popov, M. Posiadala-Zezula, J. M. Poutissou, R. Poutissou, P. Przewlocki, B. Quilain, E. Radicioni, P. N. Ratoff, M. Ravonel, M. A.M. Rayner, A. Redij, E. Reinherz-Aronis, C. Riccio, P. Rojas, E. Rondio, S. Roth, A. Rubbia, A. Rychter, R. Sacco, K. Sakashita, F. Sánchez, F. Sato, E. Scantamburlo, K. Scholberg, S. Schoppmann, J. Schwehr, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, R. Shah, A. Shaikhiev, F. Shaker, D. Shaw, M. Shiozawa, T. Shirahige, S. Short, M. Smy, J. T. Sobczyk, M. Sorel, L. Southwell, P. Stamoulis, J. Steinmann, T. Stewart, Y. Suda, S. Suvorov, A. Suzuki, K. Suzuki, S. Y. Suzuki, Y. Suzuki, R. Tacik, M. Tada, S. Takahashi, A. Takeda, Y. Takeuchi, H. K. Tanaka, H. A. Tanaka, D. Terhorst, R. Terri, T. Thakore, L. F. Thompson, S. Tobayama, W. Toki, T. Tomura, C. Touramanis, T. Tsukamoto, M. Tzanov, Y. Uchida, A. Vacheret, M. Vagins, Z. Vallari, G. Vasseur, T. Wachala, K. Wakamatsu, C. W. Walter, D. Wark, W. Warzycha, M. O. Wascko, A. Weber, R. Wendell, R. J. Wilkes, M. J. Wilking, C. Wilkinson, J. R. Wilson, R. J. Wilson, Y. Yamada, K. Yamamoto, M. Yamamoto, C. Yanagisawa, T. Yano, S. Yen, N. Yershov, M. Yokoyama, J. Yoo, K. Yoshida, T. Yuan, M. Yu, A. Zalewska, J. Zalipska, L. Zambelli, K. Zaremba, M. Ziembicki, E. D. Zimmerman, M. Zito, J. Żmuda
  • University of Tokyo
  • University of Liverpool
  • CCLRC Rutherford Appleton Laboratory
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • Kobe University
  • University of Bern
  • Colorado State University
  • IGFL, Université de Lyon, Université Lyon 1
  • University of Regina
  • University of Warwick
  • University of Oxford
  • Laboratoire de Probabilités et Modèles Aléatoires
  • Institute for Nuclear Physics
  • ETH Zurich
  • Politecnico di Bari
  • University of British Columbia
  • York University
  • University of Geneva
  • Universite Paris-Saclay
  • The Barcelona Institute of Science and Technology
  • Imperial College London
  • Lancaster University
  • Kyoto University
  • The University of Sheffield
  • CSIC-UV - Instituto de Física Corpuscular (IFIC)
  • University of Padova
  • Queen Mary University of London
  • University of Naples Federico II
  • University of Pittsburgh
  • Warsaw University of Technology
  • High Energy Accelerator Research Organization (KEK)
  • Okayama University
  • Miyagi University of Education
  • TRIUMF
  • University of Victoria
  • Duke University
  • University of Silesia
  • Ip Paris
  • Louisiana State University
  • University of Rochester
  • University of Winnipeg
  • University of Colorado Boulder
  • Stony Brook University
  • National Research Nuclear University MEPhI
  • National Centre for Nuclear Research (NCBJ)
  • Royal Holloway University of London
  • Tokyo Metropolitan University
  • Boston University
  • University of Warsaw
  • J-PARC
  • Osaka City University
  • RWTH Aachen University
  • Long Beach VA and University of California
  • University of Rome
  • Michigan State University
  • University of Toronto
  • Joint Institute for Nuclear Research, Dubna
  • Wroclaw University
  • Institute of Particle Physics
  • University of Washington
  • York College/The City University of New York

Research output: Contribution to journalArticlepeer-review

Abstract

T2K reports its first measurements of the parameters governing the disappearance of ν-μ in an off-axis beam due to flavor change induced by neutrino oscillations. The quasimonochromatic ν-μ 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 ν-μ survival probability is expected to be minimal. Using a data set corresponding to 4.01×1020 protons on target, 34 fully contained μ-like events were observed. The best-fit oscillation parameters are sin2(θ-23)=0.45 and |Δm-322|=2.51×10-3 eV2 with 68% confidence intervals of 0.38-0.64 and 2.26-2.80×10-3 eV2, respectively. These results are in agreement with existing antineutrino parameter measurements and also with the νμ disappearance parameters measured by T2K.

Original languageEnglish
Article number181801
JournalPhysical Review Letters
Volume116
Issue number18
DOIs
Publication statusPublished - 5 May 2016

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