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%0 Thesis
%A Haack, Christian
%T Observation of high-energy neutrinos from the galaxy and beyond
%I RWTH Aachen University
%V Dissertation
%C Aachen
%M RWTH-2020-07059
%P 1 Online-Ressource (xiii, 233 Seiten) : Illustrationen, Diagramme
%D 2020
%Z Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
%Z Dissertation, RWTH Aachen University, 2020
%X The IceCube Neutrino Observatory has measured a diffuse neutrino flux of astrophysical origin above   50TeV. The magnitude of the flux is close to the Waxman-Bahcall bound, suggesting a connection to ultra-high-energy cosmic-rays above 10^19 eV and therefore an extragalactic origin. However, below PeV energies, a fraction of the flux is expected to originate from the decay of charged pions created in interactions of cosmic rays (CR)with matter in the Milky Way. This diffuse galactic neutrino flux is closely related to the diffuse galactic gamma-ray flux, and carries information about the properties of galactic CR transport. At the highest energies, an important tool in measuring the properties of the astrophysical neutrino flux is the resonant W- production in anti-electron-neutrino - electron interactions (Glashow Resonance) at 6.3PeV. Apart from increasing the anti-electron-neutrino-matter cross-section by two orders of magnitudes and thus increasing the effective area for neutrino detection, the Glashow Resonance enables discrimination of neutrino and anti-neutrino fluxes, giving insight to the neutrino production processes. The first part of this thesis is dedicated to a search for the diffuse galactic neutrino emission using two different emission models. Both model tests result in overfluctuations with significances below 2 sigma. The resulting upper-limits constrain the pion component of galactic diffuse emission in an energy range currently not accessible to -ray measurements. The second part of this thesis is dedicated to the analysis of a Glashow-Resonance candidate event. Details about the directional and energy reconstruction of this event will be presented. For the first time, a measurement of the astrophysical anti-electron-neutrino flux is performed.
%F PUB:(DE-HGF)11
%9 Dissertation / PhD Thesis
%R 10.18154/RWTH-2020-07059
%U https://publications.rwth-aachen.de/record/793612