INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Estimation of the invisible energy in extensive air showers with the data collected by the Pierre Auger Observatory
FOR THE PIERRE AUGER COLLABORATION; M.J. TUEROS; A. G. MARIAZZI
Conferencia; 2016 International Conference on Ultra-High Energy Cosmic Rays (UHECR2016); 2016
Institute for Cosmic Ray Research, University of Tokyo
The determination of the energy of primary cosmic rays from their extensive air showers using the fluorescence technique requires an estimation of the energy carried away by particles reaching the ground that do not deposit all their energy in the atmosphere. This estimation istypically made using Monte Carlo simulations and depends on the assumed primary particle mass and on model predictions for hadron-air collisions at high energies. In this work we review the method that the Pierre Auger Collaboration uses to obtain the invisible energy directly from hybrid events measured simultaneously with the fluorescence and the surface detectors of the Pierre Auger Observatory. As a corroboration of these results, a new method for the determination of the invisible energy using an independent data set is also presented.Both methods agree within systematic uncertainties, reducing significantly the biases related to differences between the high energy hadronic interaction models and data.