在大气μ子中微子振荡中，陶中微子比惰性中微子更受青睐。
Tau neutrinos favored over sterile neutrinos in atmospheric muon neutrino oscillations.
作者信息
Fukuda S, Fukuda Y, Ishitsuka M, Kajita T, Kameda J, Kaneyuki K, Kobayashi K, Koshio Y, Miura M, Moriyama S, Nakahata M, Nakayama S, Obayashi Y, Okada A, Okumura K, Sakurai N, Shiozawa M, Suzuki Y, Takeuchi H, Takeuchi Y, Toshito T, Totsuka Y, Yamada S, Earl M, Habig A, Kearns E, Messier M D, Scholberg K, Stone J L, Sulak L R, Walter C W, Goldhaber M, Barszczak T, Casper D, Gajewski W, Kropp W R, Mine S, Price L R, Smy M, Sobel H W, Vagins M R, Ganezer K S, Keig W E, Ellsworth R W, Tasaka S, Kibayashi A, Learned J G, Matsuno S, Takemori D
机构信息
Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan.
出版信息
Phys Rev Lett. 2000 Nov 6;85(19):3999-4003. doi: 10.1103/PhysRevLett.85.3999.
The previously published atmospheric neutrino data did not distinguish whether muon neutrinos were oscillating into tau neutrinos or sterile neutrinos, as both hypotheses fit the data. Using data recorded in 1100 live days of the Super-Kamiokande detector, we use three complementary data samples to study the difference in zenith angle distribution due to neutral currents and matter effects. We find no evidence favoring sterile neutrinos, and reject the hypothesis at the 99% confidence level. On the other hand, we find that oscillation between muon and tau neutrinos suffices to explain all the results in hand.
先前发表的大气中微子数据无法区分μ子中微子是振荡成τ中微子还是惰性中微子，因为这两种假设都与数据相符。利用超级神冈探测器1100个有效天记录的数据，我们使用三个互补的数据样本研究中性流和物质效应导致的天顶角分布差异。我们没有发现支持惰性中微子的证据，并在99%的置信水平下拒绝了该假设。另一方面，我们发现μ子中微子和τ中微子之间的振荡足以解释目前所有的结果。
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