Possible Interpretations of IceCube High-Energy Neutrino Events

We analyze the 37 high energy neutrino candidates reported by the IceCube collaboration after three years ot time exposure. The total flux and distribution of these events clearly reveal the presence of extraterrestrial neutrinos since the atmospheric neutrino flux is not enough to explain the data. The usual candidate to explain the presence of these high energy events are astrophysical neutrinos generated from the interaction of cosmic rays with the intergalactic media. In this work we also pursue the possibility of explaining the IceCube data in the context of a decaying long lived particle (LLP) scenario. Indeed, we analyze three different scenarios considering multiple combinations of the sources mentioned above. We find that with the current data none of these scenarios is statistically preferred over the others. The necessary exposure time required to find significant differences between the scenarios is evaluated. For completeness we also present a working model that can accommodate the necessary LLP properties in order to explain the data.