Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 53: Neutrino Astronomy III

T 53.4: Vortrag

Mittwoch, 2. April 2025, 17:00–17:15, VG 1.105

Search for Ultra-High Energy Neutrinos from Gamma-Ray Bursts with the Pierre Auger Observatory — •Therese Paulsen for the Pierre-Auger collaboration — Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany

Primarily designed to detect ultra-high energy (UHE) cosmic rays, the Pierre Auger Observatory also possesses excellent sensitivity to UHE neutrinos. The Surface Detector array is used to search for highly inclined neutrino-induced air showers, which, though not observed yet, have clear characteristic signatures. Due to the null observation of UHE neutrinos, we can construct upper luminosity limits on each gamma-ray burst within the Observatory’s field of view.

As the neutrino luminosity from these sources strongly depends on the modeled emission mechanisms and dissipative processes, we construct these upper limits using different neutrino spectra corresponding to distinct scenarios, for example, the one-zone fireball model. The spectra is constructed using the source code Cosmic Ray Stochastic Interactions for Propagation (CRISP), to compute quantities related to the propagation of heavier primaries within the source environment.

Keywords: Gamma-Ray Bursts; Neutrinos; Pierre Auger Observatory; CRISP; Multimessenger