A Combined Astrophysical and Dark Matter Interpretation of the IceCube HESE and Throughgoing Muon Events

Understand

We perform a combined likelihood analysis for the IceCube 6-year high-energy starting events (HESE) and 8-year throughgoing muon events above 10 TeV using a two-component neutrino flux model.

• The two-component flux can be motivated either from purely astrophysical sources or due to a beyond Standard Model contribution, such as decaying heavy dark matter.
• We find that the astrophysical plus dark matter interpretation is mildly preferred by the current data over the purely astrophysical explanation.
• As for the astrophysical neutrinos, we consider two different source flavor compositions corresponding to the standard pion decay and muon-damped pion decay sources.