Search for neutrinoless double beta decay with GERDA phase II

Publikation: Beitrag in Buch/Konferenzbericht/Sammelband/GutachtenBeitrag in KonferenzbandBeigetragenBegutachtung

Beitragende

  • GERDA collaboration - , Jagiellonian University in Kraków (Autor:in)
  • Professur für Kernphysik
  • National Institute for Nuclear Physics
  • Russian Research Centre Kurchatov Institute
  • RAS - Institute for Nuclear Research
  • Universität Zürich
  • Max Planck Institute for Nuclear Physics
  • Università degli Studi di Milano Bicocca
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Università degli studi di Padova
  • Technische Universität München
  • Joint Institute for Nuclear Research
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Eberhard Karls Universität Tübingen
  • European Commission Joint Research Centre Institute
  • Technische Universität Dresden

Abstract

The GERmanium Detector Array (gerda) experiment, located at the Gran Sasso underground laboratory in Italy, is one of the leading experiments for the search of 0νββ decay. In Phase II of the experiment 35.6 kg of enriched germanium detectors are operated. The application of active background rejection methods, such as a liquid argon scintillation light read-out and pulse shape discrimination of germanium detector signals, allowed to reduce the background index to the intended level of 10-3 cts/(keV·kg·yr). 

In the first five month of data taking 10.8 kg yr of exposure were accumulated. No signal has been found and together with data from Phase I a new limit for the neutrinoless double beta decay half-life of 76Ge of 5.3·1025 yr at 90% C.L. was established in June 2016. Phase II data taking is ongoing and will allow the exploration of half-lifes in the 1026 yr regime. The current status of data taking and an update on the background index are presented.

Details

OriginalspracheEnglisch
TitelWorkshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2017
Redakteure/-innenOsvaldo Civitarese, Jouni Suhonen, Ivan Stekl
Herausgeber (Verlag)American Institute of Physics Inc.
ISBN (elektronisch)9780735415775
PublikationsstatusVeröffentlicht - 16 Okt. 2017
Peer-Review-StatusJa

Publikationsreihe

ReiheAIP Conference Proceedings
Nummer1
Band1894
ISSN0094-243X

Konferenz

Titel11th Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2017
Dauer29 Mai - 2 Juni 2017
StadtPrague
LandTschechische Republik

Schlagworte

ASJC Scopus Sachgebiete