| Literature DB >> 24655245 |
A Renshaw1, K Abe2, Y Hayato2, K Iyogi3, J Kameda2, Y Kishimoto2, M Miura2, S Moriyama2, M Nakahata2, Y Nakano3, S Nakayama2, H Sekiya2, M Shiozawa2, Y Suzuki2, A Takeda2, Y Takenaga3, T Tomura2, K Ueno3, T Yokozawa3, R A Wendell2, T Irvine4, T Kajita5, K Kaneyuki5, K P Lee4, Y Nishimura4, K Okumura5, T McLachlan4, L Labarga6, S Berkman7, H A Tanaka8, S Tobayama7, E Kearns9, J L Raaf10, J L Stone9, L R Sulak10, M Goldhabar11, K Bays1, G Carminati1, W R Kropp1, S Mine1, M B Smy12, H W Sobel12, K S Ganezer13, J Hill13, W E Keig13, N Hong14, J Y Kim14, I T Lim14, T Akiri15, A Himmel15, K Scholberg16, C W Walter16, T Wongjirad15, T Ishizuka17, S Tasaka18, J S Jang19, J G Learned20, S Matsuno20, S N Smith20, T Hasegawa21, T Ishida21, T Ishii21, T Kobayashi21, T Nakadaira21, K Nakamura22, Y Oyama21, K Sakashita21, T Sekiguchi21, T Tsukamoto21, A T Suzuki23, Y Takeuchi23, C Bronner24, S Hirota24, K Huang24, K Ieki24, M Ikeda24, T Kikawa24, A Minamino24, T Nakaya25, K Suzuki24, S Takahashi24, Y Fukuda26, K Choi27, Y Itow27, G Mitsuka27, P Mijakowski28, J Hignight29, J Imber29, C K Jung29, C Yanagisawa29, H Ishino30, A Kibayashi30, Y Koshio30, T Mori30, M Sakuda30, T Yano30, Y Kuno31, R Tacik32, S B Kim33, H Okazawa34, Y Choi35, K Nishijima36, M Koshiba37, Y Totsuka37, M Yokoyama38, K Martens39, Ll Marti39, M R Vagins12, J F Martin40, P de Perio40, A Konaka41, M J Wilking41, S Chen42, Y Zhang42, R J Wilkes43.
Abstract
We report an indication that the elastic scattering rate of solar B8 neutrinos with electrons in the Super-Kamiokande detector is larger when the neutrinos pass through Earth during nighttime. We determine the day-night asymmetry, defined as the difference of the average day rate and average night rate divided by the average of those two rates, to be [-3.2 ± 1.1(stat) ± 0.5(syst)]%, which deviates from zero by 2.7 σ. Since the elastic scattering process is mostly sensitive to electron-flavored solar neutrinos, a nonzero day-night asymmetry implies that the flavor oscillations of solar neutrinos are affected by the presence of matter within the neutrinos' flight path. Super-Kamiokande's day-night asymmetry is consistent with neutrino oscillations for 4 × 10(-5) eV(2) ≤ Δm 2(21) ≤ 7 × 10(-5) eV(2) and large mixing values of θ12, at the 68% C.L.Year: 2014 PMID： 24655245 DOI： 10.1103/PhysRevLett.112.091805
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161