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T: Fachverband Teilchenphysik

T 16: Neutrino Physics I

T 16.2: Vortrag

Montag, 31. März 2025, 17:00–17:15, VG 3.103

Muon Veto of LEGEND-200: Analysis and Simulations — •Gina Grünauer — Physikalisches Institut, Eberhard Karls Universität Tübingen

The Large Enriched Germanium Experiment for Neutrinoless β β Decay (LEGEND) is an phased experimental program dedicated to the search for neutrinoless double beta (0ν β β) decay of ⁷⁶Ge. To reach the aimed discovery sensitivity for a half-life of more than 10²⁸ years, a background rate of less than 10⁻⁵ cts/(keV·kg·yr) is required. A Water-Cherenkov-Veto operates for this purpose for the current experimental phase LEGEND-200. It uses photomultiplier tubes (PMTs) as light detectors in a water-tank lined with a reflective foil to increase the light yield within the system. This contribution provides the working principle as well as the ongoing data analysis and simulations of the Muon Veto of LEGEND-200.

This work is supported by the U.S. DOE and the NSF, the LANL, ORNL and LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, and MPG; the Italian INFN; the Polish NCN and MNiSW; the Czech MEYS; the Slovak RDA; the Swiss SNF; the UK STFC; the Canadian NSERC and CFI; the LNGS and SURF facilities.

Keywords: LEGEND; Water-Cherenkov-Veto; Muons; Neutrinoless Double Beta Decay; Active Background Shielding