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arXiv · 1610.04612

Dark Matter interpretation of low energy IceCube MESE excess

M. Chianese·G. Miele·S. Morisi
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Abstract

The 2-years MESE IceCube events show a slightly excess in the energy range 10-100 TeV with a maximum local statistical significance of 2.3$\sigma$, once a hard astrophysical power-law is assumed. A spectral index smaller than 2.2 is indeed suggested by multi-messenger studies related to $p$-$p$ sources and by the recent IceCube analysis regarding 6-years up-going muon neutrinos. In the present paper, we propose a two-components scenario where the extraterrestrial neutrinos are explained in terms of an astrophysical power-law and a Dark Matter signal. We consider both decaying and annihilating Dark Matter candidates with different final states (quarks and leptons) and different halo density profiles. We perform a likelihood-ratio analysis that provides a statistical significance up to 3.9$\sigma$ for a Dark Matter interpretation of the IceCube low energy excess.

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M. Chianese, G. Miele, S. Morisi. 2016-10-14. Dark Matter interpretation of low energy IceCube MESE excess. https://doi.org/10.1088/1475-7516%2F2017%2F01%2F007

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