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Direct measurement of the muonic content of extensive air showers between [Formula omitted] and [Formula omitted]eV at the Pierre Auger Observatory

Aab, A ; Abreu, P ; Aglietta, M ; Albury, J. M ; Allekotte, I ; Almela, A ; Alvarez Castillo, J

The European physical journal. C, Particles and fields, 2020-08, Vol.80 (8) [Periódico revisado por pares]

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Título:
Direct measurement of the muonic content of extensive air showers between [Formula omitted] and [Formula omitted]eV at the Pierre Auger Observatory
Autor: Aab, A ; Abreu, P ; Aglietta, M ; Albury, J. M ; Allekotte, I ; Almela, A ; Alvarez Castillo, J
É parte de: The European physical journal. C, Particles and fields, 2020-08, Vol.80 (8)
Descrição: The hybrid design of the Pierre Auger Observatory allows for the measurement of the properties of extensive air showers initiated by ultra-high energy cosmic rays with unprecedented precision. By using an array of prototype underground muon detectors, we have performed the first direct measurement, by the Auger Collaboration, of the muon content of air showers between [Formula omitted] and [Formula omitted] eV. We have studied the energy evolution of the attenuation-corrected muon density, and compared it to predictions from air shower simulations. The observed densities are found to be larger than those predicted by models. We quantify this discrepancy by combining the measurements from the muon detector with those from the Auger fluorescence detector at [Formula omitted] and [Formula omitted]. We find that, for the models to explain the data, an increase in the muon density of [Formula omitted] [Formula omitted] [Formula omitted] for EPOS-LHC, and of [Formula omitted] [Formula omitted] [Formula omitted] for QGSJetII-04, is respectively needed.
Editor: Springer
Idioma: Inglês

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