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Título: | Update on decaying and annihilating heavy dark matter with the 6-year IceCube HESE data |
Autor: | Bhattacharya, A.; Esmaili, A.; Palomares Ruiz, Sergio CSIC ORCID ; Sarcevic, I. | Palabras clave: | Dark matter theory ultra high energy photons and neutrinos |
Fecha de publicación: | may-2019 | Editor: | IOP Publishing | Citación: | Journal of Cosmology and Astroparticle Physics 2019 (3): 051 (2019) | Resumen: | 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. | Versión del editor: | http://dx.doi.org/10.1088/1475-7516/2019/05/051 | URI: | http://hdl.handle.net/10261/209199 | DOI: | 10.1088/1475-7516/2019/05/051 | Identificadores: | doi: 10.1088/1475-7516/2019/05/051 issn: 1475-7516 |
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374_Palomares_Update.pdf | 4,35 MB | Adobe PDF | Visualizar/Abrir |
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