Constraining particle dark matter using local galaxy distribution
  It has been long discussed that cosmic rays may contain signals of dark
matter. In the last couple of years an anomaly of cosmic-ray positrons has
drawn a lot of attentions, and recently an excess in cosmic-ray anti-proton has
been reported by AMS-02 collaboration. Both excesses may indicate towards
decaying or annihilating dark matter with a mass of around 1-10 TeV. In this
article we study the gamma rays from dark matter and constraints from cross
correlations with distribution of galaxies, particularly in a local volume. We
find that gamma rays due to inverse-Compton process have large intensity, and
hence they give stringent constraints on dark matter scenarios in the TeV scale
mass regime. Taking the recent developments in modeling astrophysical gamma-ray
sources as well as comprehensive possibilities of the final state products of
dark matter decay or annihilation into account, we show that the parameter
regions of decaying dark matter that are suggested to explain the excesses are
excluded. We also discuss the constrains on annihilating scenarios.
