The exploration of the universe has recently entered a new era thanks to the multi-
messenger paradigm, characterized by a continuous increase in the quantity and quality of …

The present white paper is submitted as part of the “Snowmass” process to help inform the
long-term plans of the United States Department of Energy and the National Science …

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 …

Cosmic rays are observed up to the astounding energies of more than 1020 eV, making
them the most energetic particles known in the universe. However, the origin of these …

In this work we present the interpretation of the energy spectrum and mass composition data
as measured by the Pierre Auger Collaboration above 6× 1017 eV. We use an astrophysical …

EUSO-Balloon is a pathfinder for JEM-EUSO, the mission concept of a spaceborne
observatory which is designed to observe Ultra-High Energy Cosmic Ray (UHECR)-induced …

Mini-EUSO is a telescope observing the Earth in the ultraviolet band from the International
Space Station. It is a part of the JEM-EUSO program, paving the way to future larger …

The intensity of cosmic rays with energies above∼ 1014 eV is only a few particles per
square meter per day and thus too low to allow for direct measurement with satisfactory …

Next-generation neutrino experiments will push the limits in our understanding of
astroparticle physics in the neutrino sector to energies orders of magnitude higher than the …

Upcoming neutrino telescopes may discover ultra-high-energy (UHE) cosmic neutrinos, with
energies beyond 100 PeV, in the next 10–20 years. Finding their sources would identify …