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Dova, M.T.; Manceñido, M.E.; Mariazzi, A.G.; Wahlberg, H.; Arqueros, F.; García-Pinto, D.
Astroparticle physics, 05/2009, Letnik: 31, Številka: 4Journal Article
Azimuthal asymmetries in signals of non-vertical showers have been observed in ground arrays of water Cherenkov detectors, like Haverah Park and the Pierre Auger Observatory. The asymmetry in time distributions of arriving particles offers a new possibility for the determination of the mass composition. The dependence of this asymmetry on atmospheric depth shows a clear maximum at a position that is correlated with the primary species. In this work a novel method to determine mass composition based on these features of the ground signals is presented and a Monte Carlo study of its sensitivity is carried out.
