Dresden 2013 – scientific programme

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T: Fachverband Teilchenphysik

T 92: Kosmische Strahlung 2

T 92.2: Talk

Monday, March 4, 2013, 11:20–11:35, WIL-B321

Primary energy reconstruction at KASCADE-Grande based on the S(500) observable — •Gabriel Toma — Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), P.O.BOX MG-6, Bucharest-Magurele, Romania

The primary energy of cosmic rays is inferred at KASCADE-Grande using two independently applied methods that are based on different EAS observables. A standard method is based on the correlation between the total charged particle content and the muon content of the shower, while the other method is based on the S(500) energy estimator. S(500) is a notation for the charged particle density in the air shower at 500 m distance from the shower axis and for the case of the KASCADE-Grande detector this observable was shown to be independent of the primary mass. The results of the two methods are compared when analyzing recorded data and we observe a systematic shift between the results. This does not happen when analyzing simulated events. We explain this feature as an effect of the interaction model that describes differently EAS observables such as the total charged particle content and the shape of the lateral particle density distribution.