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2015

IceCube neutrinos, decaying dark matter, and the Hubble constant

Anchordoqui, Luis A., Barger, Vernon, Goldberg, Haim et al.

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Cosmological parameters deduced from the Planck measurements of anisotropies in the cosmic microwave background are at some tension with direct astronomical measurements of various parameters at low redshifts.

Very recently, it has been conjectured that this discrepancy can be reconciled if a certain fraction of dark matter is unstable and decays between recombination and the present epoch.
Herein we show that if the superheavy relics have a branching into neutrinos B (X \to \nu \bar \nu) \sim 3 \times 10^{-9}, then this scenario can also accommodate the recently discovered extraterrestrial flux of neutrinos, relaxing the tension between IceCube results and Fermi LAT data.
The model is fully predictive and can be confronted with future IceCube data.

IceCube neutrinos, decaying dark matter, and the Hubble constant · Around

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