论文标题
在直接搜索和中微子双β衰减中探测重中性瘦素的性质
Probing the Nature of Heavy Neutral Leptons in Direct Searches and Neutrinoless Double Beta Decay
论文作者
论文摘要
重型中性瘦素（HNL）是标准模型的流行扩展，以解释中微子肿块的轻度和通过瘦素发生的物质抗逆性不对称性。未来的直接搜索，例如固定的目标设置，例如沙丘和中微子双β衰减，都可以在M_N <〜1 GEV附近的HNL质量的标准中微子质量产生的标准Seesaw SeeSAW场景中探测主动性中微子混合的状态。在此激励的情况下，我们分析了未来直接搜索与中准双β衰减之间的互补性，以探测HNL的性质，即它们是Majorana还是Quasi-dirac State，以及在无菌中微子部门中的CP侵入阶段。在对互补性的分析讨论之后，我们实施了通用的固定目标实验模型沙丘。我们对直接搜索中的HNL搜索和中微子双β衰变的联合搜索如何使用Dune和Legend-1000作为代表性的例子进行了统计研究，可以探测无菌中微子的性质。
Heavy Neutral Leptons (HNLs) are a popular extension of the Standard Model to explain the lightness of neutrino masses and the matter-antimatter asymmetry through leptogenesis. Future direct searches, such as fixed target setups like DUNE, and neutrinoless double beta decay are both expected to probe the regime of active-sterile neutrino mixing in a standard Seesaw scenario of neutrino mass generation for HNL masses around m_N <~ 1 GeV. Motivated by this, we analyse the complementarity between future direct searches and neutrinoless double beta decay to probe the nature of HNLs, i.e., whether they are Majorana or quasi-Dirac states, and CP-violating phases in the sterile neutrino sector. Following an analytic discussion of the complementarity, we implement a generic fixed target experiment modelling DUNE. We perform a statistical study in how a combined search for HNLs in direct searches and neutrinoless double beta decay, using DUNE and LEGEND-1000 as representative examples, can probe the nature of sterile neutrinos.
