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. 2011 Dec 9;107(24):241801.
doi: 10.1103/PhysRevLett.107.241801. Epub 2011 Dec 7.

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

K Abe  1 , Y Hayato, T Iida, M Ikeda, K Iyogi, J Kameda, Y Koshio, Y Kozuma, M Miura, S Moriyama, M Nakahata, S Nakayama, Y Obayashi, H Sekiya, M Shiozawa, Y Suzuki, A Takeda, Y Takenaga, 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 R Vagins, L Labarga, L M Magro, F Dufour, E Kearns, M Litos, J L Raaf, J L Stone, L R Sulak, M Goldhaber, K Bays, W R Kropp, S Mine, C Regis, M B Smy, H W Sobel, K S Ganezer, J Hill, W E Keig, J S Jang, J Y Kim, I T Lim, J B Albert, K Scholberg, C W Walter, R Wendell, T M Wongjirad, S Tasaka, J G Learned, S Matsuno, T Hasegawa, T Ishida, T Ishii, T Kobayashi, T Nakadaira, K Nakamura, K Nishikawa, H Nishino, Y Oyama, K Sakashita, T Sekiguchi, T Tsukamoto, A T Suzuki, A Minamino, T Nakaya, Y Fukuda, Y Itow, G Mitsuka, T Tanaka, C K Jung, I Taylor, C Yanagisawa, H Ishino, A Kibayashi, S Mino, T Mori, M Sakuda, H Toyota, Y Kuno, S B Kim, B S Yang, T Ishizuka, H Okazawa, Y Choi, K Nishijima, M Koshiba, M Yokoyama, Y Totsuka, S Chen, Y Heng, Z Yang, H Zhang, D Kielczewska, P Mijakowski, K Connolly, M Dziomba, R J Wilkes; Super-Kamiokande Collaboration
Affiliations

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

K Abe et al. Phys Rev Lett. .

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.

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