The precise composition of Ultra-High Energy Cosmic Rays (UHECR), coupled with their
energy spectrum and arrival directions, can inform us as to their sources, acceleration …

In this paper we review the extragalactic propagation of ultrahigh energy cosmic-ray
(UHECR). We present the different energy loss processes of protons and nuclei, and their …

We estimate the local number density of sources of ultra-high-energy cosmic rays (UHECRs)
based on the statistical features of their arrival direction distribution. We calculate the arrival …

The composition of Ultra-High Energy Cosmic Rays (UHECR's) is important for the unsolved
question of their origin. The GZK cutoff [1],[2] has been seen by a number of experiments …

We develop a model for explaining the data of Pierre Auger Observatory (Auger) for ultra
high energy cosmic rays (UHECR), in particular, the mass composition being steadily …

The Telescope Array (TA) is the largest detector in the northern hemisphere to explore the
origin of ultra‐high energy cosmic rays (UHECR). Here we present the status and …

The authors define “ultrahigh-energy cosmic rays”(UHECRs) as those cosmic rays with
energies above 10 18 eV. It had been anticipated that there would be a cutoff in the energy …

Ultrahigh-energy cosmic rays (UHECRs) are atomic nuclei from space with vastly higher
energies than any other particles ever observed. Their origin and chemical composition …

Observations of ultrahigh energy cosmic rays (UHECR) do not uniquely determine both the
injection spectrum and the evolution model for UHECR sources—primarily because …

The field of UHECRs (Ultra-High energy cosmic Rays) and the understanding of particle
acceleration in the cosmos, as a key ingredient to the behaviour of the most powerful …