期刊
PHYSICAL REVIEW D
卷 95, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.95.012007
关键词
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资金
- funding agencies of the Czech Republic
- National Center for Scientific Research/National Institute of Nuclear and Particle Physics (France)
- Russian Foundation for Basic Research (Russia)
- Agentura na Podporu Vyskumu a Vyvoja (Slovak Republic)
- Science and Technology Facilities Council (United Kingdom)
- National Science Foundation (United States)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1505149] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/K002856/1, PP/E000452/1, ST/K002856/1 SuperNEMO, ST/H000615/1 SuperNEMO, SuperNEMO, ST/K002864/1, ST/K002813/1 SuperNEMO, ST/K002864/1 SuperNEMO, ST/H000577/1 SuperNEMO, ST/H000615/1, ST/H000607/1 SuperNEMO, ST/N000455/1, ST/K001396/1, ST/K002813/1, ST/H000577/1, ST/K00140X/1, ST/K002848/1 SuperNEMO, ST/K001426/1, 1497580] Funding Source: researchfish
- STFC [ST/K002856/1, ST/K002813/1, ST/N000455/1, ST/H000577/1, ST/K001396/1, ST/K002864/1, ST/K00140X/1, ST/H000615/1] Funding Source: UKRI
The NEMO-3 experiment measured the half-life of the 2 nu beta beta decay and searched for the 0 nu beta beta decay of Cd-116. Using 410 g of Cd-116 installed in the detector with an exposure of 5.26 y, (4968 +/- 74) events corresponding to the 2 nu beta beta decay of Cd-116 to the ground state of Sn-116 have been observed with a signal to background ratio of about 12. The half-life of the 2 nu beta beta decay has been measured to be T-1/2(2 nu) = [2.74 +/- 0.04(stat) +/- 0.18(syst)] x 10(19) y. No events have been observed above the expected background while searching for 0 nu beta beta decay. The corresponding limit on the half-life is determined to be T-1/2(0 nu) >= 1.0 x 10(23) y at the 90% C. L. which corresponds to an upper limit on the effective Majorana neutrino mass of < m(nu)> <= 1.4-2.5 eV depending on the nuclear matrix elements considered. Limits on other mechanisms generating 0 nu beta beta decay such as the exchange of R-parity violating supersymmetric particles, right-handed currents and majoron emission are also obtained.
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