Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 71: Neutrino Astronomy 3

T 71.4: Talk

Wednesday, March 23, 2022, 17:00–17:15, T-H30

Event selection for new triggers used for neutrino detection at the Pierre Auger Observatory* — •Srijan Sehgal for the Pierre Auger collaboration — Bergische Universität Wuppertal, Wuppertal, Germany

The Pierre Auger Observatory with its large array of Surface Detector (SD) stations can be used to detect highly inclined neutrino-induced extensive air showers. 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 < 10¹⁹eV) regime with a little to no change in background events.

This talk analyzes the event selection procedure on data and neutrino-induced showers simulated with CORSIKA both reconstructed using the Auger software framework. Events in the zenith angle range of 60^o < θ < 75^o and energies below 10¹⁹eV are selected to investigate the low-energy performance of the new triggers. The main point of focus is the effect of the new triggers on efficiency and purity of an improved neutrino selection.

*Gefördert durch die BMBF Verbundforschung Astroteilchenphysik (Vorhaben 05A20PX1)