Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2009-03-10
Astropart.Phys.31:312-319,2009
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
Received at Editorial Office: 5 Dec 2008. Accepted for publication in Astroparticle Physics: 3 Mar 2009
Scientific paper
10.1016/j.astropartphys.2009.03.
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.
Arqueros Fernando
Dova Maria Teresa
Garcia-Pinto D.
Manceñido M. E.
Mariazzi A. G.
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