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
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.