http://arxiv.org/abs/1402.3627
First evidence of high-energy astrophysical neutrino observation with the IceCube detector from May 2010 to May 2012 is presented. Selecting for high-energy neutrino events with vertices well contained in the detector volume, the analysis has sensitivity starting at approximately 50 TeV, and the highest energy events are a few PeV. A significant excess in flux is observed above expected backgrounds from atmospheric muons and neutrinos. The sample of 28 events includes the highest energy neutrinos ever observed, and has properties consistent in flavor, arrival direction, and energy with generic expectations for neutrinos of extraterrestrial origin. Using the new found astrophysical neutrinos, spatial searches of clusters are performed to look for exact sources, marking the birth of neutirno astronomy.
N. Kurahashi
Tue, 18 Feb 14
29/72
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