The origin of ultra-high energy cosmic rays (UHECRs) has remained a mystery for over 100
years and the search for their sources is one of the biggest ongoing challenges in …

Desde que se descubrieron los rayos cósmicos hace más de un siglo, se ha obtenido un
amplio entendimiento acerca de esta radiación proveniente del espacio. Sin embargo, con …

This thesis focuses on ultra-high energy cosmic rays (UHECRs). The origin of these atomic
nuclei, discovered over a century ago and accelerated to hundreds of EeV, remains a …

As part of the US “Snowmass” community planning exercise, the UHECR community has
come together to write a comprehensive white paper discussing the recent progress and …

Origins of ultra-high-energy cosmic rays (UHECRs) are still largely unknown. In particular,
the “2nd knee” around 10 17 eV could be related to a transition of origins from the galactic to …

We present a measurement of the cosmic-ray spectrum above 100 PeV using the part of the
surface detector of the Pierre Auger Observatory that has a spacing of 750 m. An inflection of …

ABSTRACT Ultrahigh-energy (UHE) neutrinos, with energies in the EeV (1018 eV) range,
are a promising new probe of astrophysical and particle physics phenomena. In a Universe …

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 …

The origin of ultra-high-energy cosmic rays (UHECR,> 10 18 eV) is one of the current key
topics in astroparticle physics, being an open question for many decades [1]. These particles …