Studies of the UHECR Mass Composition and Hadronic Interactions with the FD and SD of the Pierre Auger Observatory
Metadatos
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EDP Sciences
Fecha
2019Referencia bibliográfica
Carceller, J. M. (2019). Studies of the UHECR Mass Composition and Hadronic Interactions with the FD and SD of the Pierre Auger Observatory. In EPJ Web of Conferences (Vol. 209, p. 01042). EDP Sciences.
Resumen
With data on the depth of maximum Xmax collected during more than a decade of
operation of the Pierre Auger Observatory, we report on the inferences on the mass composition
of UHECRs in the energy range E = 1017.2 − 1019.6 eV and on the measurements
of the proton-air cross section for energies up to 1018.5 eV. We also present the results on
Xmax obtained using the information on the particle arrival times recorded by the SD stations
allowing us to extend the Xmax measurements up to 1020 eV. The inferences on mass
composition, in particular using the data of the SD, are subject to systematic uncertainties
due to uncertainties in the description of hadronic interactions at ultra-high energies. We
discuss this problem with respect to the properties of the muonic component of extensive
air-showers as derived from the SD data.