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T: Fachverband Teilchenphysik
T 83: Methods in Astroparticle Physics IV
T 83.5: Vortrag
Donnerstag, 19. März 2026, 17:15–17:30, KS 00.004
A new optical model for LEGEND-200 with the remage simulation stack — •Manuel Huber, Rosanna Deckert, Luigi Pertoldi, and Stefan Schönert — Department of Physics, TUM School of Natural Sciences, Technical University of Munich, 85748 Garching b. München, Germany
To reach ultra-low backgrounds for the detection of the neutrinoless double-beta decay of 76Ge, the Large Enriched Germanium Experiment for Neutrinoless ββ Decay (LEGEND) operates germanium detectors in scintillating liquid argon. A quantitative model of the complex optical instrumentation of the liquid argon is crucial for developing optimal methods to discriminate signal from background. I will present the development of a Monte Carlo model for the number of detected photons in the light readout channels deployed in the currently running stage of the experimental program, LEGEND-200. It is facilitated by the new Monte Carlo simulation stack remage, based on Geant4 and our Python-based package ecosystem around pyg4ometry, that I will present. To demonstrate the applicability of the new model, comparisons of the simulated detector response with LEGEND-200 characterization data will be presented.
We acknowledge support from the DFG under Germany’s Excellence Strategy – EXC 2094 (ORIGINS) and through the Sonderforschungsbereich SFB 1258. We acknowledge support by the BMFTR Verbundprojekt 05A2023 (LEGEND).
Keywords: Neutrino Physics; Neutrinoless Double-beta Decay; Scintillation Detector; Monte-Carlo Simulation; Optical Simulation