München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 98: Kosmische Strahlung 6

T 98.4: Talk

Thursday, March 12, 2009, 17:30–17:45, M118

Characterisation of the electromagnetic component of inclined air showers — •Ines Valino¹, Jaime Alvarez-Muniz², Markus Roth¹, and Enrique Zas² — ¹Karlsruhe Institut für Technologie (KIT) — ²Universidade de Santiago de Compostela, Spain

Inclined air showers - those arriving at ground with a zenith angle θ > 60^∘ - are characterised by a dominant 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 signal induced by the electromagnetic component of inclined showers in water-Cherenkov tanks of the Pierre Auger Observatory as a function of the primary energy and mass, as well as hadronic model assumed in the simulations. We also investigate the effect of intrinsic shower-to-shower fluctuations in the signal components.