New Feature found in UHECR Energy Spectrum

New Feature found in UHECR Energy Spectrum Pierre Auger Collaboration

The energy spectrum of the highest-energy particles in the Universe, ultra-high energy cosmic rays, has been measured with the Pierre Auger Observatory with an unprecedented precision. In addition to the well-known kink in the energy spectrum, typically referred to as the ankle, a new spectral break is found at somewhat higher energy. This new break in the energy spectrum can be explained by an energy-dependent mass composition of cosmic rays. The results are published in two related papers (Phys. Rev. Lett. 125, 121106 (2020) and Phys. Rev. D 102, 062005 (2020)).

This determination of the energy spectrum is unique in having an unprecedented exposure of more than 60,000 km2 sr yr, in its method of determining the spectrum free of assumptions about the mass composition of the initial cosmic ray particle, and about details of the hadronic physics of air showers.

Read more in the Press Release

PHD Theses, Diploma Theses, Master Theses, Bachelor These


2020
PhD Theses
Search for hidden photons as dark matter candidates with the FUNK experiment. PhD dissertation.
Andrianavalomahefa, A.
2020, July 29. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000122229
Preparation of the Operation and Calibration of the Fluorescence Detector of AugerPrime. PhD dissertation.
Debatin, J. F.
2020, April 24. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000118632
Hybrid Universality Model Development and Air Shower Reconstruction for the Pierre Auger Observatory. PhD dissertation.
Hulsman, J.
2020, April 6. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000118009
Analysis of the First Data of the AugerPrime Detector Upgrade. PhD dissertation.
Taboada Núñez, Á.
2020. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000104548
2019
2018
PhD Theses
Determining the Mass Composition of Ultra-high Energy Cosmic Rays Using Air Shower Universality. PhD dissertation.
Bridgeman, A.
2018. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000085504
Inelastic diffractive event classification in proton-proton collision with the CMS experiment. PhD dissertation.
Akbiyik, M.
2018. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000084887
AMIGA muon counters and shower universality reconstruction. PhD dissertation.
Josebachuili, M.
2018. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000084389
Search for ultra-high energy photons with the AMIGA muon detector. PhD dissertation.
González, N. M.
2018. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000081130
2015
PhD Theses
Hadronic multiparticle production with Sibyll. PhD dissertation.
Riehn, F.
2015. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000052699
2013
PhD Theses
Detection of Microwave Emission of Extensive Air Showers with the CROME Experiment. PhD dissertation.
Werner, F.
2013. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000043001
Mass composition of ultra-high energy cosmic rays based on air shower universality. PhD dissertation.
Maurel, D.
2013. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000037234
2012
PhD Theses
Atmospheric Monitoring for Ground-Based Cosmic Ray Detectors. PhD dissertation.
Will, C. M.
2012. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000028831
2008
PhD Theses
Neutrino Detection with the Surface Array of the Pierre Auger Observatory. PhD dissertation.
Tamburro, A.
2008. Universität Karlsruhe (TH). doi:10.5445/IR/1000010084
Measurement of the proton-air cross section using hybrid data of the Pierre Auger Observatory. PhD dissertation.
Ulrich, R. M.
2008. Wissenschaftliche Berichte, FZKA-7389 (März 2008) Dissertation, Universität Karlsruhe 2007, Universität Karlsruhe (TH). doi:10.5445/IR/200070733
2007
Diploma Theses
The fluorescence yield of air excited by electrons measured with the AIRFLY experiment. diploma thesis.
Obermeier, A.
2007. Wissenschaftliche Berichte, FZKA-7284 (Februar 2007) Diplomarbeit, Universität Karlsruhe 2006. doi:10.5445/IR/200067269
2006
PhD Theses
Diploma Theses
Untersuchung der Lateralverteilung ausgedehnter Luftschauer anhand von Hybrid- und Oberflächendetektor-Daten des Pierre-Auger-Observatoriums. diploma thesis.
Schmidt, T.
2006. Wissenschaftliche Berichte, FZKA-7231 (Juni 2006) Diplomarbeit, Universität Karlsruhe 2006. doi:10.5445/IR/200065287
2005
PhD Theses
Description of Cherenkov light production in extensive air showers. PhD dissertation.
Nerling, F.
2005. Universität Karlsruhe (TH). doi:10.5445/IR/1000002956
Diploma Theses
Neuer Triggeralgorithmus der Auger-Fluoreszenzteleskope und Validierung ihrer Ein-Elektron-Auflösung. diploma thesis.
Asch, T.
2005. Diplomarbeit, Universität Karlsruhe 2005 Wissenschaftliche Berichte, FZKA-7179 (Dezember 2005). doi:10.5445/IR/200062146