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

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

doi:10.1088/1475-7516/2019/05/051

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

Journal Article · 29 May 2019 · Journal of Cosmology and Astroparticle Physics

DOI: https://doi.org/10.1088/1475-7516/2019/05/051 · OSTI ID:1611217

Bhattacharya, Atri ^[1]; Esmaili, Arman ^[2]; Palomares-Ruiz, Sergio ^[3]; Sarcevic, Ina ^[4]

Univ. of Liege, (Belgium). Space sciences, Technologies and Astrophysics Research (STAR) Institute
Pontifica Universidad Catolica de Chile, Santiago (Chile)
Univ. of Valencia (Spain). Instituto de Física Corpuscular (IFIC)
Univ. of Arizona, Tucson, AZ (United States)

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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Research Organization:: Univ. of Arizona, Tucson, AZ (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0009913

OSTI ID:: 1611217

Journal Information:: Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 05; ISSN 1475-7516

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Characterization of subhalo structural properties and implications for dark matter annihilation signals Moliné, Ángeles; Sánchez-Conde, Miguel A.; Palomares-Ruiz, Sergio arXiv https://doi.org/10.48550/arxiv.1603.04057	text	January 2016

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Trinity: An Air-Shower Imaging Instrument to detect Ultrahigh Energy Neutrinos Otte, A. Nepomuk; Brown, Anthony M.; Doro, Michele arXiv https://doi.org/10.48550/arxiv.1907.08727	preprint	January 2019
Oscillations of sterile neutrinos from dark matter decay eliminates the IceCube-Fermi tension Anchordoqui, Luis A.; Barger, Vernon; Marfatia, Danny arXiv https://doi.org/10.48550/arxiv.2101.09559	text	January 2021

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