Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of <SUP>48</SUP>Ca with the NEMO-3 detector
PIQUEMAL, F.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
Laboratoire Souterrain de Modane [LSMUMR6417]
< Leer menos
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
Laboratoire Souterrain de Modane [LSMUMR6417]
Idioma
en
Article de revue
Este ítem está publicado en
Physical Review D. 2016, vol. 93, p. 112008
American Physical Society
Resumen en inglés
The NEMO-3 experiment at the Modane Underground Laboratory investigates the double-beta decay of <SUP>48</SUP>Ca. Using 5.25 yr of data recorded with a 6.99 g sample of <SUP>48</SUP>Ca, approximately 150 double-beta decay ...Leer más >
The NEMO-3 experiment at the Modane Underground Laboratory investigates the double-beta decay of <SUP>48</SUP>Ca. Using 5.25 yr of data recorded with a 6.99 g sample of <SUP>48</SUP>Ca, approximately 150 double-beta decay candidate events are selected with a signal-to-background ratio greater than 3. The half-life for the two-neutrino double-beta decay of <SUP>48</SUP>Ca is measured to be T<SUB>1</SUB><SUP>/2 2 ν</SUP>=[6. 4<SUB>-0.6</SUB><SUP>+0.7</SUP>(stat<SUB>)</SUB><SUP>-0.9 +1.2</SUP>(syst ) ]×1 0<SUP>19</SUP> yr . A search for neutrinoless double-beta decay of <SUP>48</SUP>Ca yields a null result, and a corresponding lower limit on the half-life is found to be T<SUB>1</SUB><SUP>/2 0 ν</SUP>>2.0 ×1 0<SUP>22</SUP> yr at 90% confidence level, translating into an upper limit on the effective Majorana neutrino mass of ⟨m<SUB>β β</SUB>⟩<6.0 - 26 eV , with the range reflecting different nuclear matrix element calculations. Limits are also set on models involving Majoron emission and right-handed currents.< Leer menos
Palabras clave en inglés
High Energy Physics - Experiment
Nuclear Experiment
Physics - Instrumentation and Detectors
Orígen
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