We perform a geometric analysis for the sky map of the IceCube TeV-PeV neutrino excess and test its compatibility with the sky map of decaying dark matter signals in our galaxy. We have found that a galactic decaying dark matter component in general improve the goodness of the fit of our model, although the pure isotropic hypothesis has a better fit than the pure dark matter one. We also consider several representative decaying dark matter, which can provide a good fit to the observed spectrum at IceCube with a dark matter lifetime of around 12 orders of magnitude longer than the age of the universe.
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ArXiv ePrint: 1311.5864
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Bai, Y., Lu, R. & Salvado, J. Geometric compatibility of IceCube TeV-PeV neutrino excess and its galactic dark matter origin. J. High Energ. Phys. 2016, 161 (2016). https://doi.org/10.1007/JHEP01(2016)161