Characterisation of the electromagnetic component in ultra-high energy inclined air showers

Details Characterisation of the electromagnetic component in ultra-high energy inclined air showers Characterisation of the electromagnetic component in ultra-high energy inclined air showers

2009-10-15

arxiv.org/abs/0910.2873v1

Astroparticle Physics 32 (2010), pp. 304-317

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

31 pages, 18 figures, accepted for publication in Astroparticle Physics

Scientific paper

10.1016/j.astropartphys.2009.09.

Inclined air showers - those arriving at ground with zenith angle with respect to the vertical theta > 60 deg - are characterised by the dominance of the muonic component at ground which is accompanied by an electromagnetic halo produced mainly by muon decay and muon interactions. By means of Monte Carlo simulations we give a full characterisation of the particle densities at ground in ultra-high energy inclined showers as a function of primary energy and mass composition, as well as for different hadronic models assumed in the simulations. We also investigate the effect of intrinsic shower-to-shower fluctuations in the particle densities.

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