论文标题
Majorana暗物质的无菌中微子门户网站：有效的操作员和紫外线完成
Sterile neutrino portals to Majorana dark matter: effective operators and UV completions
论文作者
论文摘要
对暗物质与标准模型的相互作用的严格限制表明，暗物质不会参与量规的相互作用。在这方面，通过量规单线在可见的和黑暗部门之间进行交流的可能性似乎很自然。我们考虑了一个框架，即暗物质通过与无菌中微子的耦合与标准模型进行对话，该中微子会产生活跃的中微子质量。我们专注于Majorana暗物质的情况，其遗物丰度是通过歼灭无菌中微子的热冻结设定的。我们使用有效的现场理论方法来研究可能的无菌中微子门户对暗物质。我们发现，可以使用Lepton-number持续的和Lepton-number-violating Opitors，这与活动中微子的Dirac/Majorana特征产生了有趣的联系。在第二步中，我们打开了不同的操作员，并概述了可能的肾小函数模型。我们分析了最有前途的现象学，包括一种特殊的情况，其中无菌中微子的主要质量是辐射产生的。
Stringent constraints on the interactions of dark matter with the Standard Model suggest that dark matter does not take part in gauge interactions. In this regard, the possibility of communicating between the visible and dark sectors via gauge singlets seems rather natural. We consider a framework where the dark matter talks to the Standard Model through its coupling to sterile neutrinos, which generate active neutrino masses. We focus on the case of Majorana dark matter, with its relic abundance set by thermal freeze-out through annihilations into sterile neutrinos. We use an effective field theory approach to study the possible sterile neutrino portals to dark matter. We find that both lepton-number-conserving and lepton-number-violating operators are possible, yielding an interesting connection with the Dirac/Majorana character of active neutrinos. In a second step, we open the different operators and outline the possible renormalisable models. We analyse the phenomenology of the most promising ones, including a particular case in which the Majorana mass of the sterile neutrinos is generated radiatively.
