For the first time a proper comparison of the average depth of shower maximum (X max)
published by the Pierre Auger and Telescope Array Observatories is presented. The X max …

A bstract The forward η mesons production has been observed by the Large Hadron
Collider forward (LHCf) experiment in proton-proton collision at\(\sqrt {s}\)= 13 TeV. This …

The origin of ultrahigh energy cosmic rays (UHECR) is still unknown. However, great
progress has been achieved in past years due to the good quality and large statistics in …

The search for the origin of cosmic rays is as active as ever, mainly driven by new insights
provided by recent pieces of observation. Much effort is being channelled in putting the so …

Relativistic jets launched by supermassive black holes, so-called active galactic nuclei
(AGNs), are known as the most energetic particle accelerators in the universe. However, the …

The paper presents joint analysis of the characteristics of the electron-photon and
Cherenkov components, and muons with a threshold ϵ thr≥ 1 GeV and zenith angles less …

We present a concept for large-area, low-cost detection of ultra-high energy cosmic rays
(UHECRs) with a Fluorescence detector Array of Single-pixel Telescopes (FAST) …

The Telescope Array (TA) collaboration has reported a hotspot of 19 ultrahigh-energy
cosmic rays (UHECRs). Using a universal model with one source and energy-dependent …

Great advances have been made in the study of ultra-high energy cosmic rays (UHECR) in
the past 2 decades. These include the discovery of the spectral cut-off near eV and complex …

The Auger-TA composition working group reports on a comparison of $ X_\mathrm {max} $
distributions measured by the Pierre Auger and Telescope Array Observatories. The shapes …