Hadronic multiparticle production: the curse of terrestrial astroparticle detectors.

by Felix Riehn (TU Dortmund)

Thursday 30 Oct 2025, 15:00 → 16:30 Europe/Berlin

seminar room 3 (bldg. 1b)

High energy particles interacting in the Earth's atmosphere, in rock or in ice shelves, will initiate cascades of interactions which eventually transform the initial particles energy into secondary particles and radiation. The secondaries and the radiation are then detected by astroparticle detectors like the Pierre Auger Observatory or the IceCube neutrino telescope. In one way or another hadronic interactions play a role in these cascades of interactions, making a thorough understanding of hadronic interactions essential for the interpretation of the signals measured by the astroparticle detectors. In this seminar I will describe how hadronic interactions and associated uncertainties enter various astroparticle experiments,give a glimpse at how hadronic interactions are modelled and what the current problems are,and finally how we hope to improve in the future.