TY  - JOUR
AU  - Bhattacharya, A.
AU  - Esmaili, A.
AU  - Palomares-Ruiz, S.
AU  - Sarcevic, I.
PY  - 2019
DA  - 2019//
TI  - Update on decaying and annihilating heavy dark matter with the 6-year IceCube HESE data
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 051
EP  - 30pp
VL  - 03
IS  - 5
PB  - Iop Publishing Ltd
KW  - dark matter theory
KW  - 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.
SN  - 1475-7516
UR  - https://arxiv.org/abs/1903.12623
UR  - https://doi.org/10.1088/1475-7516/2019/05/051
DO  - 10.1088/1475-7516/2019/05/051
LA  - English
N1  - WOS:000469808500001
ID  - Bhattacharya_etal2019
ER  -