Cosmogenic Neutrinos from Cosmic Ray Interactions with Extragalactic Infrared Photons
Daniel De Marco, Todor Stanev, F. W. Stecker
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-2.5 cosmic ray injection spectrum, for example, the event rate of neutrinos of energy above 1 PeV is more than doubled.
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