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Abstract: (Elsevier)
Physics beyond the standard model might imply the cosmological production of particles with grand unification scale energies. Nucleons and γ-rays from such processes are candidates for the cosmic rays observed beyond 100 EeV (10 20 eV). Using a new particle propagation code, we calculate the neutrino fluxes predicted by such scenarios if consistency with the observed cosmic ray flux and the universal γ-ray background at 1–10 GeV is required. Flux levels detectable by proposed km 3 scale neutrino observatories are allowed by these constraints. Bounds on or detection of a neutrino flux above ∼ 1 EeV would allow neutrino astronomy to probe grand unification scale physics.
Note:
  • 5 latex pages, 1 postscript figure included, uses revtex style in two column format and psfig.sty, submitted to Phys. Lett. B
  • 96.40.Tv
  • 98.70.Sa
  • 98.70.Vc
  • 98.80.Cq
  • Neutrino astronomy
  • Gamma-ray astrophysics
  • Ultra-high energy cosmic rays
  • neutrino: cosmic radiation
  • cosmic radiation: flux
  • grand unified theory
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