Decaying dark matter at IceCube and its signature on High Energy gamma
  experiments
  The origin of neutrino flux observed in IceCube is still mainly unknown.
Typically two flux components are assumed, namely: atmospheric neutrinos and an
unknown astrophysical term. In principle the latter could also contain a
top-down contribution coming for example from decaying dark matter. In this
case one should also expect prompt and secondary gammas as well. This leads to
the possibility of a multimessenger analysis based on the simultaneous
comparison of the Dark Matter hypothesis both with neutrino and high energy
gamma rays data. In this paper, we analyze, for different decaying Dark Matter
channels, the 7.5 years IceCube HESE data, and compare the results with
previous exclusion limits coming from Fermi data. Finally, we test whether the
Dark Matter hypothesis could be further scrutinised by using forthcoming high
energy gamma rays experiments.
