| Autor: |
Augier, C., Barabash, A., Bellini, F., Benato, G., Beretta, M., Bergé, L., Billard, J., Borovlev, Yu., Cardani, L., Casali, N., Cazes, A., Chapellier, M., Chiesa, D., Dafinei, I., Danevich, F., Jesus, M., Marcillac, P., Dixon, T., Dumoulin, L., Eitel, K., Ferri, F., Fujikawa, B., Gascon, J., Gironi, L., Giuliani, A., Grigorieva, V., Gros, M., Helis, D., Huang, H., Huang, R., Imbert, L., Johnston, J., Juillard, A., Khalife, H., Kleifges, M., Kobychev, V., Kolomensky, Yu., Konovalov, S., Loaiza, P., Ma, L., Makarov, E., Mariam, R., Marini, L., Marnieros, S., Navick, X.F., Nones, C., Norman, E., Olivieri, E., Ouellet, J., Pagnanini, L., Pattavina, L., Paul, B., Pavan, M., Peng, H., Pessina, G., Pirro, S., Poda, D., Polischuk, O., Pozzi, S., Previtali, E., Redon, Th., Rojas, A., Rozov, S., Sanglard, V., Scarpaci, J., Schmidt, B., Shen, Y., Shlegel, V., Singh, V., Tomei, C., Tretyak, V., Umatov, V., Vagneron, L., Velázquez, M., Welliver, B., Winslow, L., Xue, M., Yakushev, E., Zarytskyy, M., Zolotarova, A. |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Zdroj: |
European Physical Journal |
| Popis: |
The CUPID-Mo experiment to search for 0 $$\nu \beta \beta $$ ν β β decay in $$^{100}$$ 100 Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator for CUPID, a next generation 0 $$\nu \beta \beta $$ ν β β decay experiment. CUPID-Mo was comprised of 20 enriched $$\hbox {Li}_{{2}}$$ Li 2 $$^{100}$$ 100 $$\hbox {MoO}_4$$ MoO 4 scintillating calorimeters, each with a mass of $$\sim 0.2$$ ∼ 0.2 kg, operated at $$\sim 20$$ ∼ 20 mK. We present here the final analysis with the full exposure of CUPID-Mo ( $$^{100}$$ 100 Mo exposure of 1.47 $$\hbox {kg} \times \hbox {year}$$ kg × year ) used to search for lepton number violation via 0 $$\nu \beta \beta $$ ν β β decay. We report on various analysis improvements since the previous result on a subset of data, reprocessing all data with these new techniques. We observe zero events in the region of interest and set a new limit on the $$^{100}$$ 100 Mo 0 $$\nu \beta \beta $$ ν β β decay half-life of $$T_{1/2}^{0\nu }$$ T 1 / 2 0 ν $$> {1.8}\times 10^{24}$$ > 1.8 × 10 24 year (stat. + syst.) at 90% CI. Under the light Majorana neutrino exchange mechanism this corresponds to an effective Majorana neutrino mass of $$\left$$ m β β $$ < ( 0.28 - 0.49 ) eV, dependent upon the nuclear matrix element utilized. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
