Update on decaying and annihilating heavy dark matter with the 6-year IceCube HESE data

Atri Bhattacharya, Arman Esmaili, Sergio Palomares-Ruiz, Ina Sarcevic

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number051
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number5
DOIs
StatePublished - Apr 29 2019

Keywords

  • dark matter theory
  • ultra high energy photons and neutrinos

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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