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Final Results of GERDA on the Two-Neutrino Double-β Decay Half-Life of Ge76


Abstract

We present the measurement of the two-neutrino double-β decay rate of Ge76 performed with the GERDA Phase II experiment. With a subset of the entire GERDA exposure, 11.8 kg yr, the half-life of the process has been determined: T1/22ν=(2.022±0.018stat±0.038syst)×1021  yr. This is the most precise determination of the Ge76 two-neutrino double-β decay half-life and one of the most precise measurements of a double-β decay process. The relevant nuclear matrix element can be extracted: Meff2ν=(0.101±0.001).

Abstract

We present the measurement of the two-neutrino double-β decay rate of Ge76 performed with the GERDA Phase II experiment. With a subset of the entire GERDA exposure, 11.8 kg yr, the half-life of the process has been determined: T1/22ν=(2.022±0.018stat±0.038syst)×1021  yr. This is the most precise determination of the Ge76 two-neutrino double-β decay half-life and one of the most precise measurements of a double-β decay process. The relevant nuclear matrix element can be extracted: Meff2ν=(0.101±0.001).

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > General Physics and Astronomy
Uncontrolled Keywords:General Physics and Astronomy
Language:English
Date:3 October 2023
Deposited On:22 Dec 2023 10:17
Last Modified:28 Jun 2024 03:31
Publisher:American Physical Society
ISSN:0031-9007
OA Status:Hybrid
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/physrevlett.131.142501
Official URL:https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.142501
PubMed ID:37862664
Project Information:
  • : FunderBundesministerium für Bildung und Forschung
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  • : FunderDeutsche Forschungsgemeinschaft
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  • : FunderInstituto Nazionale di Fisica Nucleare
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  • : FunderMax-Planck-Gesellschaft
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  • : FunderRussian Foundation for Basic Research
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  • : FunderSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
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  • : FunderHorizon 2020 Framework Programme
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  • : FunderH2020
  • : Grant ID690575
  • : Project TitleInvisiblesPlus - InvisiblesPlus
  • : FunderH2020
  • : Grant ID674896
  • : Project TitleELUSIVES - The Elusives Enterprise: Asymmetries of the Invisible Universe
  • : FunderScience and Technology Facilities Council
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  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)