Göttingen 2025 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 53: Neutrino Astronomy III

T 53.6: Vortrag

Mittwoch, 2. April 2025, 17:30–17:45, VG 1.105

Enhancing Sensitivity for Ultra-High Energy Down-Going Neutrino Detection with the Pierre Auger Observatory^* — •Srijan Sehgal for the Pierre-Auger collaboration — Bergische Universität Wuppertal, Wuppertal, Germany

The Pierre Auger Observatory, originally conceived to study the properties of cosmic rays, also has the capability to identify neutrino-induced extensive air showers above 10¹⁷ eV by using its large Surface Detector (SD) array. Two new SD triggers, Time-over-Threshold-deconvolved (ToTd) and Multiplicity-of-Positive Steps (MoPS), installed in 2014, were shown to vastly increase the detection capability for the neutrino-induced air showers in the lower energy (E < 10¹⁹ eV) regime.

This talk explores the role of newly implemented triggers in enhancing neutrino detection for zenith angles within the range 60^∘ < θ < 75^∘. A novel neutrino identification method, which integrates MoPS and ToTd triggers, is developed and rigorously tested on simulated neutrino-induced air showers. The method is then applied to observational data to look for neutrino-like events using a blind search strategy. On the basis of the null observation new constraints to point-like sources of ultra-high-energy neutrinos will be presented for the angular range explored.

*Supported by BMBF Verbundforschung Astroteilchenphysik (Vorhaben 05A23PX1)

Keywords: neutrino; extensive air showers; triggers; point-sources