论文标题

$^{82} $ se的Neutmitless双β衰减的最终结果与cupid-0

Final Result on the Neutrinoless Double Beta Decay of $^{82}$Se with CUPID-0

论文作者

Azzolini, O., Beeman, J. W., Bellini, F., Beretta, M., Biassoni, M., Brofferio, C., Bucci, C., Capelli, S., Caracciolo, V., Cardani, L., Carniti, P., Casali, N., Chiesa, D., Clemenza, M., Colantoni, I., Cremonesi, O., Cruciani, A., D'Addabbo, A., Dafinei, I., De Dominics, F., Di Domizio, S., Ferroni, F., Gironi, L., Giuliani, A., Gorla, P., Gotti, C., Keppel, G., Martinez, M., Nagorny, S., Nastasi, M., Nisi, S., Nones, C., Orlandi, D., Pagnanini, L., Pallavicini, M., Pattavina, L., Pavan, M., Pessina, G., Pettinacci, V., Pirro, S., Pozzi, S., Previtali, E., Puiu, A., Rusconi, C., Schaeffner, K., Tomei, C., Vignati, M., Zolotarova, A. S.

论文摘要

Cupid-0是一组Zn $^{82} $ SE低温量热量表,是闪烁的Bolometers Technology的第一个中等规模的演示器。第一个项目阶段(2017年3月 - 2018年12月)允许设置感兴趣的同位素的中微子双β衰减半衰期的最严重限制,即$^{82} $ SE。经过六个月的探测器升级后,Cupid -0开始了第二阶段和最后阶段(2019年6月至2020年2月)。在这封信中,我们描述了$^{82} $ se中性beta双β衰减的搜索,总曝光(I级I + II)为8.82 kg $ \ times $ \ times同位素。我们将$^{82} $ se的半衰期设置为$^{82} $ kr的基础状态,t $^{0ν} _ {1/2} $($^{82} $ se)$> $ 4.6 $ 4.6 $ \ times \ times \ mathrm {10} $ yr(24} $ yr wistrimane section for Section Antibal vorriala Anipriana seprima worrical worife worrical(90 siperiander) m $ _ {ββ} <$(263-545)MEV。我们还将最严格的下限设置为$^{82} $ se的中性衰减为0 $ _1^+$,2 $ _1^+$和2 $ _2^+$兴奋的状态$^{82} $ kr,找到1.8 $ \ times $ \ times $ 10 $^$ 10 $^{23} $ yr,3.0 $ yr,3.0 $ \ yr,3.0 $ \ yr {23 $ \ yr {23 $ 10} 3.2 $ \ times $ 10 $^{23} $ yr(90 $ \%$可信间隔)。

CUPID-0, an array of Zn$^{82}$Se cryogenic calorimeters, was the first medium-scale demonstrator of the scintillating bolometers technology. The first project phase (March 2017 - December 2018) allowed the most stringent limit on the neutrinoless double beta decay half-life of the isotope of interest, $^{82}$Se, to be set. After a six months long detector upgrade, CUPID-0 began its second and last phase (June 2019 - February 2020). In this letter, we describe the search for neutrinoless double beta decay of $^{82}$Se with a total exposure (phase I + II) of 8.82 kg$\times$yr of isotope. We set a limit on the half-life of $^{82}$Se to the ground state of $^{82}$Kr of T$^{0ν}_{1/2}$($^{82}$Se)$>$ 4.6$\times \mathrm{10}^{24}$ yr (90\% credible interval), corresponding to an effective Majorana neutrino mass m$_{ββ} <$ (263 -- 545) meV. We also set the most stringent lower limits on the neutrinoless decays of $^{82}$Se to the 0$_1^+$, 2$_1^+$ and 2$_2^+$ excited states of $^{82}$Kr, finding 1.8$\times$10$^{23}$ yr, 3.0$\times$10$^{23}$ yr, 3.2$\times$10$^{23}$ yr (90$\%$ credible interval) respectively.

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