Neutrinoless double electron capture is a process that, if detected, would give evidence of lepton number vio-lation and the Majorana nature of neutrinos. A search for neutrinoless double electron capture of 36Ar has been performed with germanium detectors installed in liquid argon using data from Phase I of the GERmanium Detector Array (Gerda) experiment at the Gran Sasso Laboratory of INFN, Italy. No signalwas observed and an experimental lower limit on the half-life of the radiative neutrinoless double electron capture of Ar-36 was established: T-1/2 > 3.6 x 10(21) years at 90% CI.
Limit on the radiative neutrinoless double electron capture of 36 Ar from GERDA Phase I
BETTINI, ALESSANDRO;BRUGNERA, RICCARDO;GARFAGNINI, ALBERTO;HEMMER, SABINE ELISABETH;MEDINACELI VILLEGAS, EDUARDO;SADA, CINZIA;VON STURM ZU VEHLINGEN, KATHARINA CACILIE;
2016
Abstract
Neutrinoless double electron capture is a process that, if detected, would give evidence of lepton number vio-lation and the Majorana nature of neutrinos. A search for neutrinoless double electron capture of 36Ar has been performed with germanium detectors installed in liquid argon using data from Phase I of the GERmanium Detector Array (Gerda) experiment at the Gran Sasso Laboratory of INFN, Italy. No signalwas observed and an experimental lower limit on the half-life of the radiative neutrinoless double electron capture of Ar-36 was established: T-1/2 > 3.6 x 10(21) years at 90% CI.
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