Search for double beta decay of ${}^{116}$Cd with enriched ${}^{116}$CdWO${}_4$ crystal scintillators (Aurora experiment)

Abstract

The Aurora experiment to investigate double beta decay of ${}^{116}$Cd with the help of 1.162 kg cadmium tungstate crystal scintillators enriched in ${}^{116}$Cd to 82\% is in progress at the Gran Sasso Underground Laboratory. The half-life of ${}^{116}$Cd relatively to the two neutrino double beta decay is measured with the highest up-to-date accuracy $T_{1/2}=(2.62\pm 0.14)\times 10^{19}$ yr. The sensitivity of the experiment to the neutrinoless double beta decay of ${}^{116}$Cd to the ground state of ${}^{116}$Sn is estimated as $T_{1/2}\ge 1.9\times 10^{23}$ yr at 90\% CL, which corresponds to the effective Majorana neutrino mass limit $⟨m_{\nu }⟩\le (1.2-1.8)$ eV. New limits are obtained for the double beta decay of ${}^{116}$Cd to the excited levels of ${}^{116}$Sn, and for the neutrinoless double beta decay with emission of majorons.

arXiv comment5 pages, 3 figures, 1 table, submitted as proceedings of the TAUP 2015 conference

References in corpus (18)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Theory of neutrinoless double beta decay
• Phase space factors for double-$\beta$ decay
• Theory of Neutrinos: A White Paper
• 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
• Neutrinoless Double Beta Decay and Physics Beyond the Standard Model
• The event generator DECAY4 for simulation of double beta processes and decay of radioactive nuclei
• Neutrinoless double beta decay and neutrino physics
• Limits on the neutrino mass from neutrinoless double-$\beta$ decay
• Neutrinoless Double-Beta Decay: a Probe of Physics Beyond the Standard Model
• Precise half-life values for two neutrino double beta decay
• Neutrinoless Double Beta Decay
• Low background detector with enriched 116CdWO4 crystal scintillators to search for double beta decay of 116Cd
• New results of 116Cd double beta decay study with 116CdWO4 scintillators
• CdWO4 crystal scintillators from enriched isotopes for double beta decay experiments
• Search for 2β decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators

Cited by in corpus (10)

• Neutrinoless double beta decay and neutrino mass
• Impact of the quenching of $g_{\mathrm{A}}$ on the sensitivity of $0\nu \beta \beta$ experiments
• Final results of the Aurora experiment to study 2$\beta$ decay of ${}^{116}$Cd with enriched ${}^{116}$CdWO${}_4$ crystal scintillators
• 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
• Improvement of radiopurity level of enriched ${}^{116}$CdWO${}_4$ and ZnWO${}_4$ crystal scintillators by recrystallization
• Unraveling the $0\nu \beta \beta$ Decay Mechanisms
• $\nu$DoBe -- A Python Tool for Neutrinoless Double Beta Decay
• First test of an enriched ${}^{116}$CdWO${}_4$ scintillating bolometer for neutrinoless double-beta-decay searches
• Double Beta Decay to the Excited States: Review
• Identification of radiopure tungsten for low background applications