Extremely energetic cosmic neutrinos and their impact on particle   physics and cosmology
  Existing and planned neutrino detectors, sensitive in the energy regime from 10^{17} eV to 10^{23} eV, offer opportunities for particle physics and cosmology. In this contribution, we discuss particularly the possibilities to infer information about physics beyond the Standard Model at center-of-mass energies beyond the reach of the Large Hadron Collider, as well as to detect big bang relic neutrinos via absorption dips in the observed neutrino spectra. 
A. Ringwald