Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 86: Neutrino physics 10

T 86.5: Vortrag

Donnerstag, 7. März 2024, 17:00–17:15, Geb. 30.21: Gerthsen-HS

Towards a Better Liquid Argon Anti-Coincidence Classifier for LEGEND-200 — Elisabetta Bossio², •Rosanna Deckert¹, Nils Doll¹, Patrick Krause¹, Luigi Pertoldi¹, Stefan Schönert¹, and Mario Schwarz¹ for the LEGEND collaboration — ¹Technical University of Munich, Garching, Germany — ²IRFU, CEA, Université Paris-Saclay, Paris, France

LEGEND-200 is an experiment designed to search for neutrinoless double beta decay of Ge-76. Located deep underground at LNGS, it operates up to 200 kg of enriched high-purity germanium (Ge) detectors in a liquid argon (LAr) cryostat. To achieve ultra-low backgrounds, the LAr is instrumented as an active detector to detect scintillation light emitted upon interactions with ionizing radiation, thus tagging and rejecting backgrounds. The current rejection condition of the LAr anti-coincidence cut uses the LAr detector’s light intensity information. In this talk, we will present a test statistic-based approach that exploits the time information of the LAr signals relative to the Ge signals. This new classifier can be used in a multivariate analysis to exploit the full potential of the LAr instrumentation’s rejection power.

This research is supported by the BMBF through the Verbundforschung 05A20WO2 and by the DFG through the Excellence Cluster ORIGINS and the SFB1258.

Keywords: Neutrinoless Double Beta Decay; Liquid Argon; Germanium Detectors