Radio Measurements of the Depth of Air-Shower Maximum at the Pierre Auger Observatory

A. Abdul Halim,P. Abreu，D. Zavrtanik,M. Zavrtanik

Physical review D/Physical review D（2024）

Cited 899|Views32

Abstract

To interpret the mean depth of cosmic ray air shower maximum and its dispersion, we parametrize those two observables as functions of the first two moments of the ln A distribution. We examine the goodness of this simple method through simulations of test mass distributions. The application of the parameterization to Pierre Auger Observatory data allows one to study the energy dependence of the mean ln A and of its variance under the assumption of selected hadronic interaction models. We discuss possible implications of these dependences in term of interaction models and astrophysical cosmic ray sources.

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ultra high energy cosmic rays,cosmic ray experiments

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