Speaker
Description
In view of the IceCube's 6-year high-energy starting events (HESE) sample,
we revisit the possibility that the updated data may be better explained
by a combination of neutrino fluxes from dark matter decay and an
isotropic astrophysical power-law than purely by the latter. We find
that the combined two-component flux qualitatively improves the fit
to the observed data over a purely astrophysical one, and discuss how
these updated fits compare against a similar analysis done with the
4-year HESE data. We also update fits involving dark matter decay
via multiple channels, without any contribution from the astrophysical
flux. We find that a DM-only explanation is not excluded by neutrino
data alone. Finally, we also consider the possibility of a signal
from dark matter annihilations and perform analogous analyses to
the case of decays, commenting on its implications.
