Search for differences in oscillation parameters for atmospheric neutrinos and antineutrinos at Super-Kamiokande.

/ Authors

K. Abe, Y. Hayato, T. Iida, M. Ikeda, K. Iyogi, J. Kameda, Y. Koshio, Y. Kozuma, M. Miura, S. Moriyama

and 110 more authors

M. Nakahata, S. Nakayama, Y. Obayashi, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takenaga, Y. Takeuchi, Y. Takeuchi, K. Ueno, K. Ueshima, H. Watanabe, S. Yamada, T. Yokozawa, C. Ishihara, H. Kaji, K. P. Lee, T. Kajita, K. Kaneyuki, T. McLachlan, K. Okumura, Y. Shimizu, N. Tanimoto, K. Martens, M. Vagins, M. Vagins, L. Labarga, L. Magro, F. Dufour, E. Kearns, E. Kearns, M. Litos, J. Raaf, J. Stone, J. Stone, L. Sulak, M. Goldhaber, K. Bays, W. Kropp, S. Mine, C. Regis, M. Smy, M. Smy, H. Sobel, H. Sobel, K. Ganezer, J. Hill, W. Keig, J. Jang, J. Kim, I. Lim, J. Albert, K. Scholberg, K. Scholberg, C. Walter, C. Walter, R. Wendell, T. Wongjirad, S. Tasaka, J. Learned, S. Matsuno, T. Hasegawa, T. Ishida, T. Ishii, Tomio Kobayashi, T. Nakadaira, Katsumi Nakamura, K. Nishikawa, H. Nishino, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, A. Suzuki, A. Minamino, T. Nakaya, T. Nakaya, Y. Fukuda, Y. Itow, G. Mitsuka, T. Tanaka, C. Jung, I. Taylor, C. Yanagisawa, H. Ishino, A. Kibayashi, S. Mino, T. Mori, M. Sakuda, H. Toyota, Y. Kuno, Shin-Do Kim, B. Yang, T. Ishizuka, H. Okazawa, Y. Choi, K. Nishijima, M. Koshiba, M. Yokoyama, Y. Totsuka, Shaomin Chen, Y. Heng, Z. Yang, Hong-hao Zhang, D. Kiełczewska, P. Mijakowski, K. Connolly, M. Dziomba, R. Wilkes

/ Abstract

We present a search for differences in the oscillations of antineutrinos and neutrinos in the Super-Kamiokande-I, -II, and -III atmospheric neutrino sample. Under a two-flavor disappearance model with separate mixing parameters between neutrinos and antineutrinos, we find no evidence for a difference in oscillation parameters. Best-fit antineutrino mixing is found to be at (Δm2,sin2 2θ)=(2.0×10(-3) eV2, 1.0) and is consistent with the overall Super-K measurement.

Journal: Physical review letters

DOI: 10.1103/PhysRevLett.107.241801