In this report we review the important progress made in recent years towards understanding
the experimental data on ultra-high-energy (E≳ 1 0 9 GeV) cosmic rays. We begin with a …

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 …

Magnetic Penrose process (MPP) is not only the most exciting and fascinating process
mining the rotational energy of black hole but it is also the favored astrophysically viable …

Neutrinos with energies above 1017 eV are detectable with the Surface Detector Array of the
Pierre Auger Observatory. The identification is efficiently performed for neutrinos of all …

Neutrinos in the cosmic ray flux with energies near 1 EeV and above are detectable with the
Surface Detector array (SD) of the Pierre Auger Observatory. We report here on searches …

We present a combined fit of a simple astrophysical model of UHECR sources to both the
energy spectrum and mass composition data measured by the Pierre Auger Observatory …

We present a new method for probing the hadronic interaction models at ultrahigh energy
and extracting details about mass composition. This is done using the time profiles of the …

The production and acceleration mechanisms of ultrahigh-energy cosmic rays (UHECRs) of
energy> 10 20 eV, clearly beyond the GZK cutoff limit, remain unclear, which points to the …

The interaction of ultra-high-energy cosmic rays (UHECRs) with pervasive photon fields
generates associated cosmogenic fluxes of neutrinos and photons due to photohadronic …

The Pierre Auger Observatory has begun a major Upgrade of its already impressive
capabilities, with an emphasis on improved mass composition determination using the …