Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-10-14
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures, proceedings of the 29th ICRC Pune, India
Scientific paper
Several methods can be used to perform statistical inference of primary composition of cosmic rays measured with water Cerenkov detectors as those in use at the Pierre Auger Southern Observatory. In the present work we assess the impact of additional information about the number of muons in the air shower, on the problem of statistical primary mass discrimination. Several tools are studied, including neural networks, principal component analysis and traditional methods in current use in the field. For our case study we use hypothetical plastic scintillators as muon counters, buried at the side and outside the shade of the water Cerenkov tanks. The study is extended to protons and Fe nuclei impinging on an array with two different spacings, 750 and 1500 m and, therefore, suitable to the 1-10 EeV energy range. A prototype of such a detector is under construction.
Allekotte I.
Berisso Gómez M.
de Souza Vitor
Etchegoyen Alberto
Medina C.
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