Are IceCube neutrinos unveiling PeV-scale decaying dark matter?
  Recent observations by IceCube, notably two PeV cascades accompanied by
events at energies ~ (30-400) TeV, are clearly in excess over atmospheric
background fluxes and beg for an astroparticle physics explanation. Although
some models of astrophysical accelerators can account for the observations
within current statistics, intriguing features in the energy and possibly
angular distributions of the events make worth exploring alternatives. Here, we
entertain the possibility of interpreting the data with a few PeV mass scale
decaying Dark Matter, with lifetime of the order of 10^27 s. We discuss generic
signatures of this scenario, including its unique energy spectrum distortion
with respect to the benchmark $E_\nu^{-2}$ expectation for astrophysical
sources, as well as peculiar anisotropies. A direct comparison with the data
show a good match with the above-mentioned features. We further discuss
possible future checks of this scenario.
