Results on Neutrinoless Double-βDecay ofGe<mml:mprescripts/><mml:none/>76from Phase I of the GERDA Experiment

2013/07/17 by M. Agostini, M. Allardt, E. Andreotti +127 · 24 citations
Mathematics · Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Detector #Double beta decay #Isotope #Lepton #Lepton number #Mathematics #Neutrino #Neutrino Physics Research #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Semiconductor detector #Statistics #hep-ex #hep-ph #nucl-ex

paper · pdf · doi:10.1103/physrevlett.111.122503

published as Phys. Rev. Lett 111 (2013) 122503 · 6 pages, 2 figures

arxiv created 2013/07/17 · openalex publication_date 2013/09/19 · arxiv updated 2013/12/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Neutrinoless double beta decay is a process that violates lepton number conservation. It is predicted to occur in extensions of the standard model of particle physics. This Letter reports the results from phase I of the Germanium Detector Array (GERDA) experiment at the Gran Sasso Laboratory (Italy) searching for neutrinoless double beta decay of the isotope ⁷⁶Ge. Data considered in the present analysis have been collected between November 2011 and May 2013 with a total exposure of 21.6 kg yr. A blind analysis is performed. The background index is about 1\ifmmode×\else\texttimes\fi10^\ensuremath-2 counts/(keV kg yr) after pulse shape discrimination. No signal is observed and a lower limit is derived for the half-life of neutrinoless double beta decay of ⁷⁶Ge, T_1/2^0\ensuremathν&gt;2.1\ifmmode×\else\texttimes\fi10²⁵ yr (90% C.L.). The combination with the results from the previous experiments with ⁷⁶Ge yields T_1/2^0\ensuremathν&gt;3.0\ifmmode×\else\texttimes\fi10²⁵ yr (90% C.L.).

Citations

• Status and prospects of searches for neutrinoless double beta decay
• Neutrinoless double beta decay and neutrino physics
• Combining and comparing neutrinoless double beta decay experiments using different nuclei

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Related

• Final Results of GERDA on the Search for Neutrinoless Double-β Decay
• Search of Neutrinoless Double Beta Decay with the GERDA Experiment
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