Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 58: Cosmic Rays III

T 58.5: Vortrag

Mittwoch, 2. April 2025, 17:15–17:30, VG 3.102

Uncertainties in Atmospheric Interactions — •Alicia Fattorini for the IceCube collaboration — TU Dortmund, Dortmund, Germany

Many astrophysical measurements rely on assumptions about the absolute atmospheric flux of cosmic rays and their interaction in our atmosphere. While cosmic ray detectors such as Pierre AUGER measure cosmic rays via their secondary emissions in the atmosphere, neutrino detectors such as IceCube, and IACTs such as MAGIC are subject to a background consisting of particles from the same interactions. For all these experiments, it is particularly important to understand the processes in the atmosphere and to be able to determine the flux of the emitted secondary particles. This work focuses on uncertainties in the processes occurring in the atmosphere where secondary particles are produced in cosmic ray-induced air showers, and in the cosmic ray flux itself. The aim is to estimate the normalization of the measured spectra and to determine the origin of the systematic uncertainties.

Keywords: Extended Air Showers; Cosmic Rays; Atmosphere; Systematic Uncertainties; Cosika