Final results of the Aurora experiment to study 2$\beta$ decay of $^{116}$Cd with enriched $^{116}$CdWO$_4$ crystal scintillators
| Autor: | Barabash, A. S., Belli, P., Bernabei, R., Cappella, F., Caracciolo, V., Cerulli, R., Chernyak, D. M., Danevich, F. A., d'Angelo, S., Incicchitti, A., Kasperovych, D. V., Kobychev, V. V., Konovalov, S. I., Laubenstein, M., Poda, D. V., Polischuk, O. G., Shlegel, V. N., Tretyak, V. I., Umatov, V. I., Vasiliev, Ya. V. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 98, 092007 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.98.092007 |
| Popis: | The double-beta decay of $^{116}$Cd has been investigated with the help of radiopure enriched $^{116}$CdWO$_4$ crystal scintillators (mass of 1.162 kg) at the Gran Sasso underground laboratory. The half-life of $^{116}$Cd relatively to the $2\nu2\beta$ decay to the ground state of $^{116}$Sn was measured with the highest up-to-date accuracy as $T_{1/2}=(2.63^{+0.11}_{-0.12})\times10^{19}$ yr. A new improved limit on the 0$\nu$2$\beta$ decay of $^{116}$Cd to the ground state of $^{116}$Sn was set as $T_{1/2}\geq 2.2 \times 10^{23}$ yr at 90\% C.L., which is the most stringent known restriction for this isotope. It corresponds to the effective Majorana neutrino mass limit in the range $\langle m_\nu\rangle\le(1.0-1.7)$ eV, depending on the nuclear matrix elements used in the estimations. New improved half-life limits for the 0$\nu$2$\beta$ decay with majoron(s) emission, Lorentz-violating $2\nu2\beta$ decay and $2\beta$ transitions to excited states of $^{116}$Sn were set at the level of $T_{1/2}\geq 10^{20}-10^{22}$ yr. New limits for the hypothetical lepton-number violating parameters (right-handed currents admixtures in weak interaction, the effective majoron-neutrino coupling constants, R-parity violating parameter, Lorentz-violating parameter, heavy neutrino mass) were set. Comment: 30 pages, 17 figures and 7 tables |
| Databáze: | arXiv |
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