NEMO-3 Collaboration, .;
Arnold, R;
Augier, C;
Bakalyarov, AM;
Baker, JD;
Barabash, AS;
Basharina-Freshville, A;
... Žukauskas, A; + view all
(2016)
Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of Ca 48 with the NEMO-3 detector.
Physical Review D
, 93
(11)
, Article 112008. 10.1103/PhysRevD.93.112008.
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Arnold et al Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of Ca 48 with the NEMO-3 detector VoR.pdf Download (1MB) | Preview |
Abstract
The NEMO-3 experiment at the Modane Underground Laboratory investigates the double-beta decay of Ca48. Using 5.25 yr of data recorded with a 6.99 g sample of Ca48, 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 Ca48 is measured to be T1/22ν=[6.4-0.6+0.7(stat)-0.9+1.2(syst)]×1019 yr. A search for neutrinoless double-beta decay of Ca48 yields a null result, and a corresponding lower limit on the half-life is found to be T1/20ν>2.0×1022 yr at 90% confidence level, translating into an upper limit on the effective Majorana neutrino mass of mββ<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.
| Type: | Article |
|---|---|
| Title: | Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of Ca 48 with the NEMO-3 detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.93.112008 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevD.93.112008 |
| Language: | English |
| Additional information: | Copyright © 2016 American Physical Society. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1479292 |
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