The energy of the transition from Galactic to extra-galactic origin of cosmic rays is one ofthe
major unresolved issues of cosmic-ray physics. However, strong constraints can be …

Recent observations of two coherent events with steeply upward going cosmic ray
signatures and energies of a few tenths of an EeV by the ANITA detector remain …

Ultra-high-energy cosmic rays (UHECRs) are charged particles that have been accelerated
to extreme energies, such that they are effectively travelling at the speed of light. Interactions …

Motivated by the detection of a significant dipole structure in the arrival directions of ultra-
high-energy cosmic rays above 8 EeV reported by the Pierre Auger Observatory (Auger), we …

Ultra-high energy cosmic rays (UHECRs) are the messengers of the most extreme physics in
the cosmos; however, efforts to identify their origins have thus far been thwarted by the fact …

Recent data from the Pierre Auger Observatory has revealed the presence of a large-scale
dipole in the arrival direction distribution of ultra-high energy cosmic rays (UHECR). In this …

Experimental observations of extensive air showers have revealed a deficit of the muon
content in their theoretical simulations. This hampers a precise determination of the ultra …

In this thesis, we use a phenomenological approach to the propagation of astroparticles in
order to study two relevant topics in astrophysics: Lorentz invariance violation (LIV) and the …

Particles coming from outer space with energies from 109 to 1020 eV are commonly called
cosmic rays (CRs). Some common elements are electrons, protons, helium and carbon …