论文标题
两次中微子中微子的两次中微子衰减
Two-Neutrino Double Beta Decay with Sterile Neutrinos
论文作者
论文摘要
通常被认为是针对假设的中性链双β衰减过程的实验搜索背景，两次中性双β衰变仍然提供了对标准模型以外的物理学的互补探针。在本文中，我们研究了无菌中微子的存在如何通过左撇子或右手电流耦合到标准模型，从而影响了两次中性双β衰减中即将离去的电子的能量分布和角相关性。我们特别关注运动学端点上能量分布的行为，并估计使用当前的实验数据作为无菌中微子质量的函数的主动 - 微分混合和有效的右手耦合的当前限制。我们还研究了未来实验的敏感性。我们的结果补充了0.1-10 MEV质量范围内的单个β衰减测量值对无菌中微子的相应约束。
Usually considered a background for experimental searches for the hypothetical neutrinoless double beta decay process, two-neutrino double beta decay nevertheless provides a complementary probe of physics beyond the Standard Model. In this paper we investigate how the presence of a sterile neutrino, coupled to the Standard Model either via a left-handed or right-handed current, affects the energy distribution and angular correlation of the outgoing electrons in two-neutrino double beta decay. We pay particular attention on the behaviour of the energy distribution at the kinematic endpoint and we estimate the current limits on the active-sterile mixing and effective right-handed coupling using current experimental data as a function of the sterile neutrino mass. We also investigate the sensitivities of future experiments. Our results complement the corresponding constraints on sterile neutrinos from single beta decay measurements in the 0.1 - 10 MeV mass range.
