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arXiv · 1707.05241

Interpreting IceCube 6-year HESE data as an evidence for hundred TeV decaying Dark Matter

Marco Chianese·Gennaro Miele·Stefano Morisi
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Abstract

The assumption of a single astrophysical power-law flux to explain the IceCube 6-year HESE extraterrestrial events yields a large spectral index that is in tension with gamma-ray observations and the 6-year up-going muon neutrinos data. Adopting a spectral index belonging to the range $\left[2.0,2.2\right]$, which is compatible with the one deduced by the analysis performed on the 6-year up-going muon neutrinos data and with $p$-$p$ astrophysical sources, the latest IceCube data show an up to $2.6\,\sigma$ excess in the number of events in the energy range 40--200 TeV. We interpret such an excess as a decaying Dark Matter signal and we perform a likelihood-ratio statistical test to compare the two-component scenario with respect to the single-component one.

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Marco Chianese, Gennaro Miele, Stefano Morisi. 2017-07-17. Interpreting IceCube 6-year HESE data as an evidence for hundred TeV decaying Dark Matter. https://doi.org/10.1016/j.physletb.2017.09.016

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