We consider the prospects for future ultrahigh energy cosmic ray and neutrino observations
to constrain the evolution of sources producing a proton flux above 10 EeV (1 EeV= 10 18 …

Over the last decade, observations have shown that the mean mass of ultra-high-energy
cosmic rays (UHECRs) increases progressively toward the highest energies. However, the …

We use CRPropa 3 to show how the expected cosmogenic neutrino and gamma-ray spectra
depend on the maximum energy of ultra-high energy cosmic rays (UHECRs) at their …

GeV–TeV gamma-rays and PeV–EeV neutrino backgrounds provide a unique window on
the nature of the ultra-high-energy cosmic rays (UHECRs). We discuss the implications of …

We study the production of cosmogenic neutrinos and photons during the extragalactic
propagation of ultra-high-energy cosmic rays (UHECRs). For a wide range of models in …

While propagating from their source to the observer, ultrahigh energy cosmic rays interact
with cosmological photon backgrounds and generate to the so-called``cosmogenic …

The energy at which cosmic rays from extra-galactic sources begin to dominate over those
from galactic sources is an important open question in astroparticle physics. A natural …

The Pierre Auger Observatory (PAO) has measured the spectrum and composition of the
ultrahigh energy cosmic rays with unprecedented precision. We use these measurements to …

The origin and composition of ultra-high-energy cosmic rays (UHECRs) remain a mystery.
The proton dip model describes their spectral shape in the energy range above 10 9 GeV by …

Cosmogenic neutrinos are produced when ultrahigh-energy cosmic rays (UHECRs) interact
with cosmological photon fields. Limits on the diffuse flux of these neutrinos can be used to …