Detecting Ultra High Energy Cosmic Rays (UHECRs) enables us to measure the proton-air
inelastic cross section σ inel p–air at energies that we are unable to access with particle …

Ultrahigh energy cosmic rays provide the highest known energy source in the Universe to
measure proton cross sections. Though conditions for collecting such data are less …

The proton-air inelastic cross section (σ p-air inel) is measured at s≈ 2 TeV at the EAS-TOP
extensive air shower experiment by studying the absorption length of cosmic ray proton …

In this work we are reporting on the measurement of the proton-air inelastic cross section σ p-
air inel using the Telescope Array detector. Based on the measurement of the σ p-air inel …

Abstract Ultra High Energy Cosmic Ray (UHECR) detectors have been reporting on the
proton-air cross section measurement beyond the capability of particle accelerators since …

The cross section of cosmic ray protons with air is derived from data collected with the Pierre
Auger Observatory [1] at energies far beyond the reach of human-made particle …

Cosmic ray data may allow the determination of the proton-air cross section at ultra-high
energy. For example, the distribution of the first interaction point in air showers reflects the …

Knowledge of the primary composition of cosmic rays is very important for understanding the
nature and origin of ultra-high-energy cosmic rays (UHECR). As cosmic rays propagate …

At s= 57±7 TeV, the Pierre Auger Observatory (PAO) measured the p-air inelastic production
cross section, σ p-air prod= 475±22 (stat)±15 20 (syst) mb, assuming a proton cosmic ray …

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Page 1 29th International Cosmic Ray Conference Pune (2005) 7, 343–346 p–air inelastic …