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Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of Ca48 with the NEMO-3 detector
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NEMO-3 Collaboration (Including:
). (2016) Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of Ca48 with the NEMO-3 detector. Physical Review D (Particles, Fields, Gravitation and Cosmology), 93 (11). 112008. doi:10.1103/PhysRevD.93.112008![[img]](http://wrap.warwick.ac.uk/style/images/fileicons/application_pdf.png) |
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Official URL: http://dx.doi.org/10.1103/PhysRevD.93.112008
Abstract
The NEMO-3 experiment at the Modane Underground Laboratory investigates the double-beta decay of 48Ca. Using 5.25 yr of data recorded with a 6.99 g sample of 48 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 48Ca is measured to be T2ν1/2=[6.4+0.7−0.6(stat)+1.2 −0.9(syst)]×1019 yr. A search for neutrinoless double-beta decay of 48Ca yields a null result, and a corresponding lower limit on the half-life is found to be T0ν1/2 >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
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Half-life (Nuclear physics), Isoptopes -- Decay, Double beta decay, Neutrinos -- Mass -- Measurement, Laboratoire souterrain de Modane | ||||||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||||||
| Publisher: | American Physical Society | ||||||||
| ISSN: | 1550-7998 | ||||||||
| Official Date: | 14 June 2016 | ||||||||
| Dates: |
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| Date of first compliant deposit: | 18 January 2017 | ||||||||
| Volume: | 93 | ||||||||
| Number: | 11 | ||||||||
| Article Number: | 112008 | ||||||||
| DOI: | 10.1103/PhysRevD.93.112008 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access | ||||||||
| Funder: | Czech Science Foundation (CSF), Centre national de la recherche scientifique (France) (CNRS), Rossiĭskiĭ fond fundamentalʹnykh issledovaniĭ [Russian Foundation for Basic Research] (RFBR), Science and Technology Facilities Council (Great Britain) (STFC) | ||||||||
| Open Access Version: |
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