Seminarios y conferencias

First results of the LEGEND-200 experiment in the search for neutrinoless double beta decay

Name: First results of the LEGEND-200 experiment in the search for neutrinoless double beta decay
Start: 2025-04-01T11:30:00+02:00
End: 2025-04-01T13:00:00+02:00
Location: No location set

por Carmen Romo Luque (Los Alamos National Laboratory)

martes 1 abr 2025, 11:30 → 13:00 Europe/Madrid

Descripción

The LEGEND experiment is trying to find the extremely rare neutrinoless double beta decay of 76Ge using isotopically-enriched high-purity germanium (HPGe) detectors. The detection of this process would imply that the neutrino is a Majorana particle and the total lepton number would not be conserved, which could be related to the cosmological asymmetry between matter and antimatter through leptogenesis.

The first phase, LEGEND-200, has been collecting physics data at LNGS in Italy for more than a year with 140 kg of HPGe detectors. The installation of more detectors is planned for the near future. The Collaboration has been focused on the analysis and understanding of the first set of LEGEND-200 data, the evaluation of the sensitivity and the study of the residual backgrounds.

In this seminar, I will discuss the neutrinoless double beta decay process and the key characteristics an experiment must have to search for it. The focus will be on the LEGEND experiment, including the results from the first year of data taking, the current background levels observed in the region of interest, and the experiment's performance in terms of background rejection. Lastly, I will provide an update on the status of the upcoming LEGEND-1000 phase.