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arXiv 2104.11248hep-phastro-ph.CO
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标准模型U(1)扩展中的无菌中微子暗物质

Sterile neutrino dark matter in a U(1) extension of the standard model

Sho Iwamoto, Károly Seller, Zoltán Trócsányi

摘要:

我们从解释宇宙中观测到的暗物质能量密度的观点出发,探讨了标准模型--也称为超弱模型--的U(1)扩展的参数空间。新的粒子谱包含一个复杂的标量单线态和三个右手中微子,其中最轻的一个是暗物质的候选者。我们探讨了暗物质产生的冻结和冻结机制。在这两种情况下,我们发现超弱耦合与新规范玻色子的质量的平面中的区域不排除由当前的实验约束。这些区域是不同的,其中一个冻结将在不久的将来探索中性规范玻色子的搜索。

英文摘要:

We explore the parameter space of a U(1) extension of the standard model -- also called the super-weak model -- from the point of view of explaining the observed dark matter energy density in the Universe. The new particle spectrum contains a complex scalar singlet and three right-handed neutrinos, among which the lightest one is the dark matter candidate. We explore both freeze-in and freeze-out mechanisms of dark matter production. In both cases, we find regions in the plane of the super-weak coupling vs. the mass of the new gauge boson that are not excluded by current experimental constraints. These regions are distinct and the one for freeze-out will be explored in searches for neutral gauge boson in the near future.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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