Abstract
We discuss the production of cosmogenic neutrinos on extragalactic infrared photons in a model of its cosmological evolution. The relative importance of these infrared photons as a target for proton interactions is significant, especially in the case of steep injection spectra of the ultrahigh energy cosmic rays. For an E cosmic ray injection spectrum, for example, the event rate of neutrinos of energy above 1 PeV is more than doubled.
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