4.7 Article

Probing the origin of cosmic rays with extremely high energy neutrinos using the IceCube Observatory

Journal

PHYSICAL REVIEW D
Volume 88, Issue 11, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.88.112008

Keywords

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Funding

  1. U.S. National Science Foundation - Office of Polar Programs
  2. U.S. National Science Foundation - Physics Division
  3. University of Wisconsin Alumni Research Foundation
  4. Grid Laboratory Of Wisconsin (GLOW) grid infrastructure at the University of Wisconsin Madison
  5. Open Science Grid (OSG) grid infrastructure
  6. U.S. Department of Energy
  7. National Energy Research Scientific Computing Center
  8. Louisiana Optical Network Initiative (LONI)
  9. Natural Sciences and Engineering Research Council of Canada
  10. WestGrid and Compute/Calcul Canada
  11. Swedish Research Council
  12. Swedish Polar Research Secretariat
  13. Swedish National Infrastructure for Computing (SNIC)
  14. Knut and Alice Wallenberg Foundation, Sweden
  15. German Ministry for Education and Research (BMBF)
  16. Deutsche Forschungsgemeinschaft (DFG)
  17. Helmholtz Alliance for Astroparticle Physics (HAP)
  18. Research Department of Plasmas with Complex Interactions (Bochum), Germany
  19. Fund for Scientific Research (FNRS-FWO)
  20. FWO Odysseus Programme
  21. Flanders Institute to encourage scientific and technological research in industry (IWT)
  22. Belgian Federal Science Policy Office (Belspo)
  23. University of Oxford, United Kingdom
  24. Marsden Fund, New Zealand
  25. Australian Research Council
  26. Japan Society for Promotion of Science (JSPS)
  27. Swiss National Science Foundation (SNSF), Switzerland
  28. National Research Foundation of Korea (NRF)
  29. Direct For Mathematical & Physical Scien [1210052] Funding Source: National Science Foundation
  30. Direct For Mathematical & Physical Scien
  31. Division Of Physics [1205403, 1205807, 1307472] Funding Source: National Science Foundation
  32. Division Of Physics [1210052] Funding Source: National Science Foundation
  33. Division Of Physics
  34. Direct For Mathematical & Physical Scien [0969661, 1306958] Funding Source: National Science Foundation
  35. Science and Technology Facilities Council [PP/C506205/1, ST/J000507/1] Funding Source: researchfish
  36. STFC [PP/C506205/1, ST/J000507/1] Funding Source: UKRI

Ask authors/readers for more resources

We have searched for extremely high energy neutrinos using data taken with the IceCube detector between May 2010 and May 2012. Two neutrino-induced particle shower events with energies around 1 PeV were observed, as reported previously. In this work, we investigate whether these events could originate from cosmogenic neutrinos produced in the interactions of ultrahigh energy cosmic rays with ambient photons while propagating through intergalactic space. Exploiting IceCube's large exposure for extremely high energy neutrinos and the lack of observed events above 100 PeV, we can rule out the corresponding models at more than 90% confidence level. The model-independent quasidifferential 90% C. L. upper limit, which amounts to E-2 phi(nu e)+(nu mu)+(nu tau) = 1.2 x 10(-7) GeV cm(-2) s(-1) sr(-1) at 1 EeV, provides the most stringent constraint in the energy range from 10 PeV to 10 EeV. Our observation disfavors strong cosmological evolution of the highest energy cosmic-ray sources such as the Fanaroff-Riley type II class of radio galaxies.

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