Final report on the search for neutrinoless double-β decay of 76Ge from the Gotthard underground experiment

0+) > 6.0(3.3) x 10^(23) yr for the transition to the ground state and T1/2(0+ --> 2+) > 1.4(0.65) x 10^(23) yr for the transition to the first excited state at 68% (90%) C.L. From these results we derive an upper limit for the Majorana mass of the neutrino in the range of 1.8 to 6.7 eV depending on matrix-element calculations. The same results allow limits to be set for the right-handed-current parameters: < 3.6 x 10^(-6) and < 2.2 x 10^(-8). -->
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Jazyk: English
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https://resolver.caltech.edu/CaltechAUTHORS:REUprd92
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Přírůstkové číslo: edsair.od........38..8af0f027b42c4be733a38b5fc4ff314f
Autor: Reusser, D., Treichel, M., Boehm, F., Fisher, P., Gabathuler, K., Henrikson, H. E., Jörgens, V., Mitchell, L. W., Nussbaum, C., Vuilleumier, J.-L.
Jazyk: angličtina
Rok vydání: 1992
Předmět:
Popis: We report here on the final results of a search for Ge-76 double-beta decay conducted in the Gotthard underground laboratory. The detector consists of an array of eight high-purity natural germanium crystals totaling 1095 cm^3 fiducial volume. The accumulated data set represents a sensitivity of 10.0 kg yr. No indication of neutrinoless double-beta decay was found. The measured half-life limits are T1/2(0+ --> 0+) > 6.0(3.3) x 10^(23) yr for the transition to the ground state and T1/2(0+ --> 2+) > 1.4(0.65) x 10^(23) yr for the transition to the first excited state at 68% (90%) C.L. From these results we derive an upper limit for the Majorana mass of the neutrino in the range of 1.8 to 6.7 eV depending on matrix-element calculations. The same results allow limits to be set for the right-handed-current parameters: < 3.6 x 10^(-6) and < 2.2 x 10^(-8).
Databáze: OpenAIRE
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