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Measurement of the 2νββ decay half-life and search for the 0νββ decay of Cd116 with the NEMO-3 detector
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(2017) Measurement of the 2νββ decay half-life and search for the 0νββ decay of Cd116 with the NEMO-3 detector. Physical Review D (Particles, Fields, Gravitation and Cosmology), 95 (1). 012007. doi:10.1103/PhysRevD.95.012007 ISSN 1550-7998. An open access version can be found in:
Official URL: http://dx.doi.org/10.1103/PhysRevD.95.012007
Abstract
The NEMO-3 experiment measured the half-life of the 2νββ decay and searched for the 0νββ decay of 116Cd. Using 410 g of 116Cd installed in the detector with an exposure of 5.26 y, (4968±74) events corresponding to the 2νββ decay of 116Cd to the ground state of 116Sn have been observed with a signal to background ratio of about 12. The half-life of the 2νββ decay has been measured to be T2ν1/2=[2.74±0.04(stat)±0.18(syst)]×1019 y. No events have been observed above the expected background while searching for 0νββ decay. The corresponding limit on the half-life is determined to be T0ν1/2≥1.0×1023 y at the 90% C.L. which corresponds to an upper limit on the effective Majorana neutrino mass of ⟨mν⟩≤1.4–2.5 eV depending on the nuclear matrix elements considered. Limits on other mechanisms generating 0νββ decay such as the exchange of R-parity violating supersymmetric particles, right-handed currents and majoron emission are also obtained.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1550-7998 | ||||||
| Official Date: | 17 January 2017 | ||||||
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| Volume: | 95 | ||||||
| Number: | 1 | ||||||
| Article Number: | 012007 | ||||||
| DOI: | 10.1103/PhysRevD.95.012007 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Open Access Version: | |||||||
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