Artigo Acesso aberto Revisado por pares

Direct Measurement of the Muon Density in Air Showers with the Pierre Auger Observatory

2019; EDP Sciences; Volume: 210; Linguagem: Inglês

10.1051/epjconf/201921002013

ISSN

2101-6275

Autores

Sarah Müller,

Tópico(s)

Neutrino Physics Research

Resumo

As part of the upgrade of the Pierre Auger Observatory, the Auger Muons and Infill for the Ground Array (AMIGA) underground muon detector extension will allow for direct muon measurements for showers falling into the SD-750 array. We optimized the AMIGA muon reconstruction procedure by introducing a geometrical correction for muons leaving a signal in multiple detector strips due to their inclined angle of incidence and deriving a new unbiased parametrization of the muon lateral distribution function. Furthermore, we defined a zenith-independent estimator ρ 35 of the muon density by parametrizing the attenuation of the muonic signal due to the atmosphere and soil layer above the buried detectors and quantified the relevant systematic uncertainties for AMIGA. The analysis of one year of calibrated data recorded with the prototype array of AMIGA confirms the results of previous studies indicating a disagreement between the muon content in simulations and data.

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