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We perform a geometric analysis for the sky map of the IceCube TeV-PeVneutrino excess and test its compatibility with the sky map of decaying darkmatter signals in our galaxy. Using both Kolmogorov-Smirnov and thelikelihood-ratio tests, we have found that the observed event sky map prefersto have a combination of the galactic dark matter and a homogeneous backgroundcontributions, compared to a purely galactic dark matter origin. For theassumption that the galactic dark matter is responsible for all neutrinoexcess, the current data can also exclude a wide range of dark matter profilesexcept flatter profiles such as the isothermal one. We also consider severalrepresentative decaying dark matter spectra, which can provide a good fit tothe observed spectrum at IceCube with a dark matter lifetime of around 12orders of magnitude longer than the age of the universe.

Geometric Compatibility of IceCube TeV-PeV Neutrino Excess and its Galactic Dark Matter Origin