EPJ Web Conf.
Volume 145, 2017ISVHECRI 2016 – XIX International Symposium on Very High Energy Cosmic Ray Interactions
|Number of page(s)||8|
|Section||Cosmic Ray and Gamma-Ray Experiments|
|Published online||26 June 2017|
Recent results from the Pierre Auger Observatory on the mass composition and hadronic interactions of ultra-high energy cosmic rays
1 Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Argentina
2 Observatorio Pierre Auger, Av. San Martín Norte 304, 5613, Malargüe, Argentina
Published online: 26 June 2017
Recent results on the mass composition and hadronic interactions of ultra-high energy cosmic rays (UHECR) obtained at the Pierre Auger Observatory are reviewed. Different studies based on shower observables recorded with the fluorescence and surface detectors of the Observatory indicate that the mass composition is getting lighter for the energies below ≈ 2 EeV and heavier afterwards. A fully consistent description of the data collected at the Observatory cannot be achieved with any of the up-to-date interaction models.
© The Authors, published by EDP Sciences 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
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