论文标题
搜索具有Cupid-0的细粒子
Search for Majoron-like particles with CUPID-0
论文作者
论文摘要
我们首次介绍了使用闪烁的低温热量表的中微子双$β$衰减（$0νββ的$β$衰减（$0νββ的$））的首次搜索。我们使用贝叶斯方法来重建背景源活动，并评估$^{82} $ SE $0νββχ_0$的潜在贡献。我们考虑了几种可能的理论模型，这些模型预测了类似主要的玻色子偶联与中微子的存在。中性玻色子在中微子双$β$衰减中的排放引起的能量光谱具有光谱指标，$ n = $ 1、2、3或7。我们没有发现这些衰减模式中的任何一个证据，将下限设置为1.2 $^$^$^$^$^$^$^$^$ n = $^$ n = $^$ n = $ n = $ n = $ n = $ n = $ n = $ n = $ n = 1.2 $^$ n = 10 $^{22} $ yr for $ n = $ n = $ 2，1.4 $ \ times $ 10 $^{22} $ yr for $ n = $ n = $ 3和2.2 $ \ times $ 10 $^{21} $ yr for $ n = $ 7。这些是$ 0M $^$^$^$^upperiative $^apection的最佳限制。
We present the first search for the Majoron-emitting modes of the neutrinoless double $β$ decay ($0νββχ_0$) using scintillating cryogenic calorimeters. We analysed the CUPID-0 Phase I data using a Bayesian approach to reconstruct the background sources activities, and evaluate the potential contribution of the $^{82}$Se $0νββχ_0$. We considered several possible theoretical models which predict the existence of a Majoron-like boson coupling to the neutrino. The energy spectra arising from the emission of such bosons in the neutrinoless double $β$ decay have spectral indices $n=$ 1, 2, 3 or 7. We found no evidence of any of these decay modes, setting a lower limit (90% of credibility interval) on the half-life of 1.2 $\times$ 10$^{23}$ yr in the case of $n=$ 1, 3.8 $\times$ 10$^{22}$ yr for $n=$ 2, 1.4 $\times$ 10$^{22}$ yr for $n=$ 3 and 2.2 $\times$ 10$^{21}$ yr for $n=$ 7. These are the best limits on the $0νββχ_0$ half-life of the $^{82}$Se, and demonstrate the potentiality of the CUPID-0 technology in this field.
