# EPS-HEP2021 conference

26-30 July 2021
Zoom
Europe/Berlin timezone

## Final results of GERDA on the search for neutrinoless double beta decay

28 Jul 2021, 16:45
15m
Zoom

#### Zoom

Parallel session talk Neutrino Physics

### Speaker

Yannick Müller (Physik-Institut, University of Zurich)

### Description

The GERDA (GERmanium Detector Array) collaboration operated high-purity Ge detectors enriched in $^{76}$Ge at LNGS to search for neutrinoless double beta decay ($0\nu\beta\beta$). An observation would imply both the Majorana nature of neutrinos and the violation of lepton number conservation, with important consequences for the neutrino mass scale, and the matter-antimatter asymmetry in the Universe. The operation of high resolution Ge detectors in an active liquid Ar shield combined with a powerful pulse shape discrimination allowed the collection of a background-free data set. With a total exposure of 127.2 kg yr, a lower limit on the half-life of $0\nu\beta\beta$ in $^{76}$Ge of $T_{1/2} > 1.8 \times 10^{26}$ yr at 90% C.L was set, a world-leading constraint in the search for $0\nu\beta\beta$. In this talk I will give an overview of the experimental techniques exploited to reach the final result.

Email yannmu@physik.uzh.ch GERDA collaboration Yannick Mueller

### Primary author

Yannick Müller (Physik-Institut, University of Zurich)