Time asymmetries in extensive air showers: a novel method to identify UHECR species

D. GARCIA-PINTO, FERNANDO ARQUEROS, M. MONASOR, M.T. DOVA, A.G. MARIAZZI, HERNAN WAHLBERG

Lodz, Polonia

Conferencia; 31th International Cosmic Ray Conference; 2009

The azimuthal asymmetry in the timedistribution of shower particles detected by a groundarray offers a new possibility for the determinationof the mass composition. The dependence of thisasymmetry on atmospheric depth shows a clear maximumat a value that is correlated with the primarymass. In this work a novel method to determine masscomposition based on these features of the groundsignals is presented.