Cosmic ray physics with ARGO-YBJ

TL;DR

This paper reports on the ARGO-YBJ experiment's extensive data collection over five years, providing precise measurements of cosmic ray energy spectra and composition from TeV to PeV energies, enhancing understanding of cosmic ray origins.

Contribution

It presents new, high-precision measurements of the cosmic ray energy spectrum and composition in the 10^{12} to 10^{16} eV range, focusing on the knee region.

Findings

All-particle and proton+helium spectra measured accurately.

Results support models of cosmic ray origin and propagation.

Cross-validation among different experimental techniques.

Abstract

The ARGO--YBJ experiment has been in stable data taking for more than five years at the Yangbajing cosmic ray observatory (Tibet, P.R. China, 4300 m a.s.l.). The detector collected about $5\times10^{11}$ events in a wide energy range from few TeVs up to the PeV region. In this work we summarize the latest results in cosmic ray physics particularly focusing on the cosmic ray energy spectrum. The results of the measurement of the all-particle and proton plus helium energy spectra in the energy region between $10^{12} - 10^{16}$ eV are discussed. A precise measurement of the cosmic ray energy spectrum and composition in this energy region allows a better understanding of the origin of the knee and provides a powerful cross-check among different experimental techniques.