4.7 Article

Search for neutrinos from decaying dark matter with IceCube: IceCube Collaboration

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EUROPEAN PHYSICAL JOURNAL C
卷 78, 期 10, 页码 -

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SPRINGER
DOI: 10.1140/epjc/s10052-018-6273-3

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资金

  1. USA - U.S. National Science Foundation-Office of Polar Programs, U.S. National Science Foundation-Physics Division, Wisconsin Alumni Research Foundation
  2. Center for High Throughput Computing (CHTC) at the University of Wisconsin-Madison
  3. Extreme Science and Engineering Discovery Environment (XSEDE), U.S. Department of Energy-National Energy Research Scientific Computing Center
  4. Astroparticle physics computational facility at Marquette University
  5. FWO Odysseus and Big Science programmes
  6. Belgian Federal Science Policy Office
  7. Germany - Bundesministerium fur Bildung und Forschung (BMBF)
  8. Deutsche Forschungsgemeinschaft (DFG)
  9. Helmholtz Alliance for Astroparticle Physics (HAP), Initiative and Networking Fund of the Helmholtz Association
  10. Swedish Polar Research Secretariat
  11. Knut and Alice Wallenberg Foundation
  12. Australia - Australian Research Council
  13. Compute Canada
  14. Denmark - Villum Fonden
  15. Danish National Research Foundation (DNRF)
  16. New Zealand - Marsden Fund
  17. Japan - Japan Society for Promotion of Science (JSPS)
  18. Swiss National Science Foundation (SNSF)
  19. Villum Fonden [00013161] Funding Source: researchfish
  20. STFC [ST/P000770/1] Funding Source: UKRI

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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 10(28) s at 90% CL for dark matter masses above 10 TeV.

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