Search for neutrinos from decaying dark matter with IceCube
Apr 11, 20188 pages
Published in:
- Eur.Phys.J.C 78 (2018) 10, 831
- Published: Oct 16, 2018
e-Print:
- 1804.03848 [astro-ph.HE]
DOI:
- 10.1140/epjc/s10052-018-6273-3 (publication)
Experiments:
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Abstract: (Springer)
With the observation of high-energy astrophysical neutrinos by the IceCube Neutrino Observatory, interest has risen in models of PeV-mass decaying dark matter particles to explain the observed flux. We present two dedicated experimental analyses to test this hypothesis. One analysis uses 6 years of IceCube data focusing on muon neutrino ‘track’ events from the Northern Hemisphere, while the second analysis uses 2 years of ‘cascade’ events from the full sky. Known background components and the hypothetical flux from unstable dark matter are fitted to the experimental data. Since no significant excess is observed in either analysis, lower limits on the lifetime of dark matter particles are derived: we obtain the strongest constraint to date, excluding lifetimes shorter than at 90% CL for dark matter masses above .Note:
- 8 pages, 8 fgures
- dark matter: lifetime
- dark matter: mass
- dark matter: decay
- IceCube
- flux
- energy: high
- observatory
- background
- cascade
- tracks
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Figures(9)
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