Dark Matter interpretation of low energy IceCube MESE excess

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.

20 pages, 7 figures. v2: version published in JCAP

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Cited by in corpus (10)

• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• Interpreting IceCube 6-year HESE data as an evidence for hundred TeV decaying Dark Matter
• Starburst galaxies strike back: a multi-messenger analysis with Fermi-LAT and IceCube data
• Constraints on heavy decaying dark matter from 570 days of LHAASO observations
• Probing decaying heavy dark matter with the 4-year IceCube HESE data
• First implications of Tibet AS${}_{\gamma }$ data for heavy dark matter
• Use of ANTARES and IceCube data to constrain a single power-law neutrino flux
• The prediction of using LHAASO's cosmic-ray electron measurements to constrain decaying heavy dark matter
• Energy-dependent flavour ratios in neutrino telescopes from charm
• Searching for Dark Matter Annihilation with IceCube and P-ONE