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 …

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 …

We demonstrate that supernova remnant (SNR) shocks embedded within massive star
clusters can reproduce both the cosmic-ray proton and all-particle spectra measured in the …

We revisit constraints on decaying very heavy dark matter (VHDM) using the latest ultrahigh-
energy cosmic-ray (UHECR; E≳ 10 18 eV) data and ultrahigh-energy (UHE) γ-ray flux upper …

Using the data of the Pierre Auger Observatory, we report on a search for signatures that
would be suggestive of super-heavy particles decaying in the Galactic halo. From the lack of …

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 …

Ground-based cosmic ray experiments detect cosmic ray mainly by measuring the
longitudinal and lateral distribution of secondary particles produced in the extensive air …

For over a century, the identification of high-energy cosmic ray (CR) sources remains an
open question. For Galactic CRs with energy up to 1015 eV, supernova remnants (SNRs) …

The cosmic-ray database, CRDB, has been gathering cosmic-ray data for the community
since 2013. We present a new release, CRDB v4. 1, providing many new quantities and …

It is shown that the relativistic jets associated with the growth and past activity of the
supermassive black hole in the Andromeda galaxy could be the main source of cosmic rays …