Ultrahigh energy cosmic rays from neutrino emitting acceleration sources?
Ultrahigh energy cosmic rays from neutrino emitting acceleration sources?
We demonstrate by numerical flux calculations that neutrino beams producing the observed highest energy cosmic rays by weak interactions with the relic neutrino background require a non-uniform distribution of sources. Such sources have to accelerate protons at least up to 10^{23} eV, have to be opaque to their primary protons, …