Update on decaying and annihilating heavy dark matter with the 6-year IceCube HESE data. (arXiv:1903.12623v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Bhattacharya_A/0/1/0/all/0/1">Atri Bhattacharya</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Esmaili_A/0/1/0/all/0/1">Arman Esmaili</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Palomares_Ruiz_S/0/1/0/all/0/1">Sergio Palomares-Ruiz</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Sarcevic_I/0/1/0/all/0/1">Ina Sarcevic</a>
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.
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.
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