达尔文天文台对$^{136} $ xe的中性betaβ衰减的敏感性

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达尔文天文台对$^{136} $ xe的中性betaβ衰减的敏感性

Sensitivity of the DARWIN observatory to the neutrinoless double beta decay of $^{136}$Xe

论文作者

Agostini, F., Maouloud, S. E. M. Ahmed, Althueser, L., Amaro, F., Antunovic, B., Aprile, E., Baudis, L., Baur, D., Biondi, Y., Bismark, A., Breur, P. A., Brown, A., Bruno, G., Budnik, R., Capelli, C., Cardoso, J., Cichon, D., Clark, M., Colijn, A. P., Cuenca-García, J. J., Cussonneau, J. P., Decowski, M. P., Depoian, A., Dierle, J., Di Gangi, P., Di Giovanni, A., Diglio, S., Santos, J. M. F. dos, Drexlin, G., Eitel, K., Engel, R., Ferella, A. D., Fischer, H., Galloway, M., Gao, F., Girard, F., Glück, F., Grandi, L., Größle, R., Gumbsheimer, R., Hansmann-Menzemer, S., Jörg, F., Khundzakishvili, G., Kopec, A., Kuger, F., Krauss, L. M., Landsman, H., Lang, R. F., Lindemann, S., Lindner, M., Lopes, J. A. M., Villalpando, A. Loya, Macolino, C., Manfredini, A., Undagoitia, T. Marrodán, Masbou, J., Masson, E., Meinhardt, P., Milutinovic, S., Molinario, A., Monteiro, C. M. B., Murra, M., Oberlack, U. G., Pandurovic, M., Peres, R., Pienaar, J., Pierre, M., Pizzella, V., Qin, J., García, D. Ramírez, Reichard, S., Rupp, N., Sanchez-Lucas, P., Sartorelli, G., Schulte, D., Schumann, M., Lavina, L. Scotto, Selvi, M., Silva, M., Simgen, H., Steidl, M., Terliuk, A., Therreau, C., Thers, D., Thieme, K., Trotta, R., Tunnell, C. D., Valerius, K., Volta, G., Vorkapic, D., Weinheimer, C., Wittweg, C., Wolf, J., Zopounidis, J. P., Zuber, K.

论文摘要

达尔文天文台是一个提出的下一代实验，用于搜索粒子暗物质和$^{136} $ xe的中性s中准双β衰变。在其50 $ \，$ t总天然Xenon库存中，40 $ \，$ t将是时间投影室的主动目标，因此包含约3.6吨$^{136} $ XE。在这里，我们表明其预计的半衰期敏感性为$ 2.4 \ times10^{27} \，$ yr，使用5T天然氙的基准量和10 $ \，$ yr的操作，背景速度小于0.2 $〜$ evates/（t $ \ cdot $ yr）。这种敏感性基于对大型均质目标中背景和事件拓扑的详细蒙特卡洛模拟研究。达尔文的科学范围将与使用$^{136} $ XE的Xenon进行专用双β衰变实验相提并论。

The DARWIN observatory is a proposed next-generation experiment to search for particle dark matter and for the neutrinoless double beta decay of $^{136}$Xe. Out of its 50$\,$t total natural xenon inventory, 40$\,$t will be the active target of a time projection chamber which thus contains about 3.6 t of $^{136}$Xe. Here, we show that its projected half-life sensitivity is $2.4\times10^{27}\,$yr, using a fiducial volume of 5t of natural xenon and 10$\,$yr of operation with a background rate of less than 0.2$~$events/(t$\cdot$yr) in the energy region of interest. This sensitivity is based on a detailed Monte Carlo simulation study of the background and event topologies in the large, homogeneous target. DARWIN will be comparable in its science reach to dedicated double beta decay experiments using xenon enriched in $^{136}$Xe.

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