Multi-flavour PeV neutrino search with IceCube
August 16, 2017
August 03, 2018
The IceCube observatory, located at the South Pole has been completed in 2010 and is the largest neutrino detector in the world. PeV neutrinos have been discovered in previous analyses which were optimised for different event topologies. A new search has been developed to select PeV cascades that are not fully contained in the detector. It is therefore sensitive to the Glashow resonance at 6.3~PeV. Together with the existing high-energy-starting-events (HESE) and extreme-high-energy (EHE) channels, the combined event selection provides the highest sensitivity to the beyond-PeV region, where a cut-off in the spectrum could occur. We will show the sensitivities for six years of data taking to demonstrate the preferred scenario for the cut-off energies and possible constraints on the flavour-dependent cut-off. The result is important both for understanding the source properties and for providing the possibility of reliable astrophysical-background estimations of GZK neutrino searches.
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