Energetics of the ultrahigh-energy cosmic rays (UHECRs) generated in the Universe is
crucial for pinning down their candidate sources. Using the recent Auger data on UHECR …

Abstract The Telescope Array surface detector stations record the temporal development of
the signal from the extensive air shower front which carries information about the type of the …

Ultra-high energy cosmic ray experimental data are now of very good statistical significance
even in the region of the expected GZK feature. The identification of their sources requires …

The origin and nature of ultrahigh-energy cosmic rays (UHECRs, E> 10 18 eV) is one of the
most intriguing unsolved problems of modern astrophysics. This review is dedicated to the …

Astrophysical and cosmogenic neutrinos are produced in the interactions of ultra-high
energy cosmic rays. Astrophysical neutrinos originate from the interactions of cosmic ray …

We review the experimental evidences about flux and mass composition of ultra high energy
cosmic rays in connection with theoretical scenarios concerning astrophysical sources. In …

A key to resolving the mystery of ultrahigh energy cosmic rays is the measurement of the
mass composition by air shower experiments. However, the interpretation of the observed …

The possibility for a self-consistent description of all the basic features of the observed
cosmic ray spectra and primary composition variations in the energy range of 10 15÷ 10 20 …

GRBs have long been considered as potential sources of hadronic acceleration of ultra-high
energy cosmic rays and, more recently, as potential sources of the diffuse neutrino flux …

Using the Auger mass-composition analysis of ultra high energy cosmic rays, based on the
shape-fitting of X max distributions [1], we demonstrate that mass composition and energy …