Speaker
Prof.
INA SARCEVIC
(UNIVERSITY OF ARIZONA)
Description
The IceCube detection of High Energy Starting Events (HESE) and
the upward muon track events (6 year data) are presently hard to
explain with the single power-law astophysical flux for
energies above 30TeV. We investigate the possibility that a
significant component of the additional neutrino flux originates
due to the decay of a very heavy dark matter particle via several
possible channels into standard model particles. We perform
a full 4 parameter fit to IceCube data in which we vary
astrophysical flux normalization, power-law index, dark matter
mass, dark matter lifetime and dark matter decay mode.
We show that that dark matter with mass in the PeV range and
the lifetime around 10^27s provides much better
fit to IC data than the best-fit astrophysical flux alone.
We also find dark matter lifetime limits which are much stronger
that those obtained from gamma-ray data for all channels
except $ b \bar{b}$, which is also disfavored by the
IceCube HESE data.
Primary author
Prof.
INA SARCEVIC
(UNIVERSITY OF ARIZONA)