Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
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DOI：
10.1103/physrevlett.113.101101
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发表时间：
2014-09-02
影响因子：
8.6
通讯作者：
Zoll, M.
中科院分区：
文献类型：
--
作者：
Aartsen, M. G.;Ackermann, M.;Zoll, M.
2010年至2012年间，在冰立方探测器内对高能中微子相互作用的研究首次提供了来自地外的高能中微子通量的证据。用同样的方法对冰立方探测器第三年（2012-2013）的完整数据进行分析的结果与之前报道的100 TeV-PeV范围内的天体物理通量一致，每味10(-8)GeV cm(-2) s(-1) sr(-1)，并且拒绝了对5.7 sigma合并三年数据的纯粹大气解释。这些数据与所有三种中微子的相同通量和各向同性到达方向的预期一致，表明它们要么是众多的，要么是空间扩展的。该数据集为期三年，寿命为988天，总共包含37个中微子候选事件，沉积能量从30到2000 TeV不等。2000-TeV事件是迄今为止观测到的能量最高的中微子相互作用。
A search for high-energy neutrinos interacting within the IceCube detector between 2010 and 2012 provided the first evidence for a high-energy neutrino flux of extraterrestrial origin. Results from an analysis using the same methods with a third year (2012-2013) of data from the complete IceCube detector are consistent with the previously reported astrophysical flux in the 100 TeV-PeV range at the level of 10(-8) GeV cm(-2) s(-1) sr(-1) per flavor and reject a purely atmospheric explanation for the combined three-year data at 5.7 sigma. The data are consistent with expectations for equal fluxes of all three neutrino flavors and with isotropic arrival directions, suggesting either numerous or spatially extended sources. The three-year data set, with a live time of 988 days, contains a total of 37 neutrino candidate events with deposited energies ranging from 30 to 2000 TeV. The 2000-TeV event is the highest-energy neutrino interaction ever observed.