The determination of the primary cosmic ray mass composition from the characteristics of extensive air showers (EAS), obtained at an observation level in the lower half of the atmosphere, is still an open problem. In this work we propose a new method of Multiparametric Topological Analysis and show its applicability for the determination of the mass composition of the primary cosmic rays at the PeV energy region.
A New multiparametric topological method for determining the primary cosmic ray mass composition in the knee energy region / Ambrosio, M.; Aramo, C.; D'Urso, D.; Erlykin, Anatoly D.; Guarino, F.; Insolia, A.. - (2004), pp. 481-488. ((Intervento presentato al convegno Vulcano Workshop 2004: Frontier Objects in Astrophysics and Particle Physics tenutosi a Vulcano, Italy nel 24-29 May 2004.