Garchinger Maier-Leibnitz-Kolloquium: First LEGEND-200 data in the quest for the neutrinoless double beta-decay

by Dr Luigi Pertoldi (Physik Department E15, TUM)

Thursday 4 Jul 2024, 16:15 → 17:15 Europe/Berlin

Lecture Hall, ground floor (west) (LMU building, Am Coulombwall 1, campus Garching)

The LEGEND experimental program is dedicated to the search for the neutrinoless double-beta (0νββ) decay of 76Ge with isotopically-enriched high-purity germanium (HPGe) detectors and a discovery sensitivity beyond a half-life of 10^28 years. The first phase of the project, LEGEND-200, is  stably accumulating physics data at LNGS underground lab since more than one year with 140 kg of HPGe detectors, and plans to install more in the coming months. The collaboration has scrutinized this first data to assess the sensitivity of the experiment and study the composition of the LEGEND-200 residual background. In this talk, we will present the performance of the experiment in terms of background rejection and signal acceptance, a first model of the background composition before analysis cuts and the data in the region of interest, including an updated 0νββ constraint based on LEGEND data and past experiments. We will conclude with an update on the status of the experiment's future phase, LEGEND-1000.

Hybrid access via ZOOM:
https://lmu-munich.zoom.us/j/98457332925?pwd=TWc3V1JkSHpyOTBPQVlMelhuNnZ1dz09
Meeting ID: 984 5733 2925
Passcode: 979953

kolloquium-04-07-24.pdf