Speaker
Bjoern Lehnert
(TU Dresden)
Description
The GERmanium Detector Array (GERDA) is an experiment designed to investigate the neutrinoless double beta decay (0nubb) in 76Ge. An array of high purity germanium detectors enriched to 86% of 76Ge is operated inside 65m^3 of liquid argon (LAr) inside the Laboratori Nazionali del Gran Sasso.
The experiment aims to explore the 0nubb half-life up to 1.4e26 yr with a collected exposure of 100 kg yr separated into two physics phases. The data taking of Phase I started in November 2011 and is planed to finish in June 2013 with more than 20 kg yr of exposure and a background index of 2e-2 cts / (keV kg yr) around the Q-value of 2039 keV. Phase II of the experiment is being prepared with 30 additional Broad Energy Germanium (BEGe) detectors and an additional instrumentation of the LAr, aiming at a background index reduction of a factor 10 w.r. to Phase I.
This talk will present the latest results of the GERDA collaboration including a new measurement of the 2nubb spectrum of Ge76 and the decomposition of the background. Furthermore, the preparations for the blinded 0nubb analysis of Phase I data will be presented along with the roadmap and improvements planed for Phase II.
Primary author
Bjoern Lehnert
(TU Dresden)
