Measurement of the $2\nu \beta \beta$ Decay Half-Life and Search for the $0\nu \beta \beta$ Decay of ${}^{116}$Cd with the NEMO-3 Detector

Abstract

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 ${}^{116}$Cd. Using $410$ g of ${}^{116}$Cd installed in the detector with an exposure of $5.26$ y, ($4968\pm 74$) events corresponding to the $2\nu \beta \beta$ 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 $2\nu \beta \beta$ decay has been measured to be $ T_{1/2}^{2ν}=[2.74\pm0.04\mbox{(stat.)}\pm0.18\mbox{(syst.)}]\times10^{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 $T_{1/2}^{0\nu }\ge 1.0\times 10^{23}$ y at the $90$ % C.L. which corresponds to an upper limit on the effective Majorana neutrino mass of $⟨m_{\nu }⟩\le 1.4-2.5$ 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.

References in corpus (8)

• Phase space factors for double-$\beta$ decay
• Energy density functional study of nuclear matrix elements for neutrinoless $\beta \beta$ decay
• $0\nu \beta \beta$ and $2\nu \beta \beta$ nuclear matrix elements in the interacting boson model with isospin restoration
• $0\nu \beta \beta$ and $2\nu \beta \beta$ nuclear matrix elements, QRPA, and isospin symmetry restoration
• Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO
• Precise half-life values for two neutrino double beta decay
• Systematic study of nuclear matrix elements in neutrinoless double-beta decay with a beyond mean-field covariant density functional theory
• Measurement of the background in the NEMO 3 double beta decay experiment

Cited by in corpus (10)

• Direct Measurements of Neutrino Mass
• Impact of the quenching of $g_{\mathrm{A}}$ on the sensitivity of $0\nu \beta \beta$ experiments
• Unraveling the $0\nu \beta \beta$ Decay Mechanisms
• Search for neutrinoless quadruple-$\beta$ decay of ${}^{150}$Nd with the NEMO-3 detector
• Hiding neutrinoless double beta decay in the minimal seesaw mechanism
• CP Symmetries as Guiding Posts: Revamping Tri-Bi-Maximal Mixing-I
• Probing Beyond the Standard Model Physics with Double-beta Decays
• Comprehensive Review of 2$\beta$ Decay Half-Lives
• Investigation of 2$\beta$ Decay of ${}^{116}$Cd with the Help of Enriched ${}^{116}$CdWO${}_4$ Crystal Scintillators
• Pairing properties of the double-β emitter 116Cd