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Physics Department Colloquium
First Evidence for Energetic Cosmic Neutrinos with IceCube
Time: 3:30 PM
Place: 2241 Chamberlin Hall (coffee at 430 pm)
Speaker: Albrecht Karle, University of Wisconsin Department of Physics
Abstract: Neutrino astronomy was proposed in the early 1960s as way to explore high energy phenomena in Universe. After 20 years of experimental efforts towards a large neutrino telescope at the South Pole, IceCube has come in full operation since May 2011. One of the primary goals of IceCube is the search for an energetic astrophysical neutrinos flux. I will discuss searches for high-energy neutrinos (energies > 100 TeV) with IceCube, which have recently produced the first evidence for a flux of neutrinos beyond expectations from neutrinos generated in the EarthaEuroTMs atmosphere. This includes the detection of events with energies above 1000 TeVaEuro"the highest energy neutrinos ever observed. I will discuss our recent findings as well as strategies underway that may help to shed more light on the origin of highest energy particles in the Universe.
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