PT Journal
AU Bhattacharya, A
   Esmaili, A
   Palomares-Ruiz, S
   Sarcevic, I
TI Update on decaying and annihilating heavy dark matter with the 6-year IceCube HESE data
SO Journal of Cosmology and Astroparticle Physics
JI J. Cosmol. Astropart. Phys.
PY 2019
BP 051
EP 30pp
VL 03
IS 5
DI 10.1088/1475-7516/2019/05/051
LA English
DE dark matter theory; ultra high energy photons and neutrinos
AB 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.
ER