Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 70: Hauptvorträge III

T 70.1: Hauptvortrag

Donnerstag, 22. März 2018, 11:00–11:35, Z6 - HS 0.004

The Pierre Auger Observatory: the quest for elucidating the nature and origin of UHECRs — •Markus Roth — KIT, Karlsruhe, Germany

Ultra-high energy cosmic rays are the most energetic particles directly measured, reaching orders of magnitude above those attained in the LHC. The Pierre Auger Observatory is the largest ultra-high energy cosmic ray observatory in the world. The huge amount of high quality data collected since 2004 up to now led to great improvements in our knowledge of ultra-high energy cosmic rays. The suppression of the cosmic-ray flux at highest energies was clearly established, and the extra-galactic origin of these particles was confirmed. On the other hand, measurements of the depth of shower maximum indicate a puzzling trend in the mass composition of cosmic rays at energy around the ankle up to the highest energy. The just started upgrade of the Observatory, dubbed AugerPrime, will improve the identification of the mass of primaries allowing us to disentangle models of origin and propagation of cosmic rays. We will present the latest results and future perspectives emphasizing the expected performance of AugerPrime.