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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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Arnold, R., Augier, C., Baker, J. D., Barabash, A. S., Basharina-Freshville, A., Blondel, S., Blot, S., Bongrand, M., Boursette, D., Brudanin, V. et al.
(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:
  • ArXiv
Official URL: http://dx.doi.org/10.1103/PhysRevD.95.012007

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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
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
Dates:
DateEvent
17 January 2017Published
17 January 2017Accepted
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:
  • ArXiv
Contributors:
ContributionNameContributor ID
Research GroupNEMO-3 Collaboration, UNSPECIFIED

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