Astroparticle and particle physics at ultra-high energy: results from the Pierre Auger Observatory

TL;DR

This paper reviews the Pierre Auger Observatory's recent findings on ultra-high energy cosmic rays, including their origins, composition, and implications for fundamental physics at energies beyond current accelerators.

Contribution

It presents new measurements and analyses from the Pierre Auger Observatory that advance understanding of cosmic ray sources and high-energy particle interactions.

Findings

Evidence for the energy spectrum and composition of UHECRs

Insights into hadronic interactions at ultra-high energies

Constraints on non-standard physics effects

Abstract

The scientific achievements of the Pierre Auger Collaboration cover diverse and complementary fields of research. The search for the origin of ultra-high energy cosmic rays (UHECRs) is based on the measurement of the energy spectrum and mass composition of the primaries, on studies of multi-messengers, and on extensive anisotropy searches. With the collected data it is also possible to explore the characteristics of hadronic interactions at energies unreachable at human-made accelerators, and to assess the existence of non-standard physics effects. A selection of the latest results is presented and the emerging picture is discussed.