TY  - THES
AB  - The thesis describes the work done to explore and quantify the improvements to the neutrino detection capability of the Pierre Auger Observatory for the zenith angle range of 60°-75° with the additional electromagnetic triggers introduced in 2014. The triggers internally referred to as "new" triggers consist of Time-over-Threshold-deconvolved (ToTd) and Multiplicity-of-Positive-Steps (MoPS). Each aspect of the method used for neutrino search in the zenith range explored is investigated and updated to include these new triggers. This method is then tested on observational data collected at the observatory between 2014-2022 to look for neutrino-like events in a blind search strategy. Following a null observation new constraints to a diffuse flux of Ultra-High Energy (UHE) neutrinos are presented. An upper-limit for point-like sources of UHE neutrinos is also described for the angular range and the energies explored. The work from the thesis was also published and presented in a concise form at the 39th International Cosmic Ray Conference and can be found in PoS-ICRC2025-1170.
AU  - Sehgal, Srijan
CY  - Wuppertal
DO  - 10.25926/BUW/0-883
DP  - Bergische Universität Wuppertal
KW  - Astro-particle Physics
KW  - Ultra-High Energy neutrinos
KW  - Ultra-High Energy Cosmic Rays
KW  - New techniques and triggers
LA  - eng
N1  - Bergische Universität Wuppertal, Dissertation, 2025
PB  - Veröffentlichungen der Universität
PY  - 2025
SP  - 1 Online-Ressource (ix, 191 Seiten) : Illustrationen, Diagramme
T2  - Physik
TI  - Enhancing the sensitivity for ultra-high energy down-going neutrino detection with the Pierre Auger Observatory
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:468-2-6042
Y2  - 2026-01-18T06:10:51
ER  -