Arnold, R;
Augier, C;
Baker, JD;
Barabash, AS;
Basharina-Freshville, A;
Blondel, S;
Blot, S;
... Zukauskas, A; + view all
(2017)
Measurement of the 2 nu beta beta decay half-life and search for the 0 nu beta beta decay of Cd-116 with the NEMO-3 detector.
Physical Review D
, 95
(1)
, Article 012007. 10.1103/PhysRevD.95.012007.
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Abstract
The NEMO-3 experiment measured the half-life of the 2 ν β β decay and searched for the 0 ν β β decay of 116 Cd . Using 410 g of 116 Cd installed in the detector with an exposure of 5.26 y, ( 4968 ± 74 ) events corresponding to the 2 ν β β decay of 116 Cd to the ground state of 116 Sn have been observed with a signal to background ratio of about 12. The half-life of the 2 ν β β decay has been measured to be T 2 ν 1 / 2 = [ 2.74 ± 0.04 ( stat ) ± 0.18 ( syst ) ] × 1 0 19 y . No events have been observed above the expected background while searching for 0 ν β β decay. The corresponding limit on the half-life is determined to be T 0 ν 1 / 2 ≥ 1.0 × 1 0 23 y at the 90% C.L. which corresponds to an upper limit on the effective Majorana neutrino mass of ⟨ m ν ⟩ ≤ 1.4 – 2.5 eV depending on the nuclear matrix elements considered. Limits on other mechanisms generating 0 ν β β decay such as the exchange of R-parity violating supersymmetric particles, right-handed currents and majoron emission are also obtained.
| Type: | Article |
|---|---|
| Title: | Measurement of the 2 nu beta beta decay half-life and search for the 0 nu beta beta decay of Cd-116 with the NEMO-3 detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.95.012007 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevD.95.012007 |
| Additional information: | © 2017 American Physical Society |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, DOUBLE-BETA-DECAY, STATE DOMINANCE HYPOTHESIS, NUCLEAR-DATA SHEETS, NEUTRINO MASS, MAJORON, VALUES |
| 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.ucl.ac.uk/id/eprint/1540909 |
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