论文标题
在双β衰减中搜索轻质的奇异费米子
Search for Light Exotic Fermions in Double-Beta Decays
论文作者
论文摘要
粒子物理学的标准模型预测了某些核的双$β$衰减，并发射两个活性中微子。在这封信中，我们认为，通过搜索电子光谱中的光谱扭曲，相对于标准模型期望，可以使用双$β$衰减实验来探测具有光奇异的费米的模型。我们考虑了两个具体示例：带有轻菌中微子的型号，单独生产在双$β$衰减中，以及带有$ z_2 $ -odd fermion的轻度型号，是由于$ z_2 $对称性而产生的。我们估计选择双$β$衰减实验的发现潜力，并发现未来的搜索将首次测试MEV质量尺度上关注的参数空间的新部分。
The Standard Model of Particle Physics predicts the double-$β$ decay of certain nuclei with the emission of two active neutrinos. In this letter, we argue that double-$β$ decay experiments could be used to probe models with light exotic fermions through the search for spectral distortions in the electron spectrum with respect to the Standard Model expectations. We consider two concrete examples: models with light sterile neutrinos, singly produced in the double-$β$ decay, and models with a light $Z_2$-odd fermion, pair produced due to a $Z_2$ symmetry. We estimate the discovery potential of a selection of double-$β$ decay experiments and find that future searches will test for the first time a new part of the parameter space of interest at the MeV-mass scale.
