Hinting at primary composition using asymmetries in time distributions
Abstract
Evidence of azimuthal asymmetries in the time structure and signal size have been found in non-vertical showers at the Pierre Auger Observatory. It has been previously shown that the asymmetry in time distributions offers a new possibility for the determination of the mass composition. New studies have demonstrated that the dependence of the asymmetry parameter in the rise-time and fall-time distributions with sec(theta) shows a clear peak. Both, the position of the peak, X_asymax, and the size of the asymmetry at X_asymax are sensitive to primary mass composition and have a small dependence on energy. In this paper a study of the discriminating power of the new observables to separate primary species is presented.
Cite
@article{arxiv.astro-ph/0507171,
title = {Hinting at primary composition using asymmetries in time distributions},
author = {M. T. Dova and M. Mancenido and A. G. Mariazzi and F. Arqueros and D. Garcia-Pinto},
journal= {arXiv preprint arXiv:astro-ph/0507171},
year = {2007}
}
Comments
To be published in the Proceedings of 29th International Cosmic Ray Conference (ICRC 2005), Pune, India, August 3-10, 2005