A new surface parameter for composition studies at high energies

Details A new surface parameter for composition studies at high energies A new surface parameter for composition studies at high energies

2009-07-31

arxiv.org/abs/0907.5480v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 5 figures. 31st ICRC, LODZ 2009

Scientific paper

A new family of parameters intended for composition studies is presented. They make exclusive use of surface data combining the information from the total signal at each triggered detector and the array geometry. We perform an analytical study of these composition estimators in order to assess their reliability, stability and possible optimization. The influence of the different slopes of the proton and Iron lateral distribution function on the discrimination power of the estimators is also studied. Additionally, the stability of the parameter in face of a possible underestimation of the size of the muon component by the shower simulation codes, as it is suggested by experimental evidence, is also studied.

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